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Product Catalog
VariTrane™ Products
Parallel and Series Fan-Powered
VPCF, VPWF, VPEF, VSCF, VSWF, VSEF,
LPCF, LPWF, LPEF, LSCF, LSWF, LSEF
Variable-Air-Volume (VAV) System
EA
RA
OA
supply fan
PA
cooling coil variablespeed drive thermostat
VAV box
SA
July 2013
VAV-PRC012-EN
Introduction
Fan-powered units offer energy savings due to intermittent fan control.The fan energizes only in heating mode when the space needs heat. Additional energy savings are obtained by using warm plenum air for free reheat. Motor heat is never wasted in parallel units.They are an excellent choice when minimal zone heating is needed.
Figure 1.
Parallel fan-powered terminal unit (L) & series fan-powered terminal units (R)
Figure 2.
Low height series: LSCF (L) & low height series: LSWF (R)
Figure 3.
Low height series: LSEF (L) & low height parallel: LPCF (R)
Figure 4.
Low height parallel: LPWF (L) & low height parallel: LPEF (R)
Revision Summary
VAV-PRC012-EN (16 Jul 2013).
Updated proportional water valve design.
VAV-PRC012-EN (27 June 2013).
Updated controls information. Updated dimensions for units with attenuators.
Trademarks
Earthwise, VariTrane, VariTrac, Trane and the Trane logo are trademarks of Trane in the United
States and other countries. All trademarks referenced in this document are the trademarks of their respective owners.
BACnet is a registered trademark of American Society of Heating, Refrigerating and Air-
Conditioning Engineers (ASHRAE); LONMARK and LonTalk are registered trademarks of Echelon
Corporation.
© 2013 Trane All rights reserved VAV-PRC012-EN
Table of Contents
Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . 47
Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . 53
Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . 68
Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . 70
Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . 92
Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . 98
Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . 123
Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . 134
Mechanical Specifications: Fan-Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
DDC Remote Heat Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Tracer™ UC400 and UC210 Programmable BACnet Controllers . . . . . . . 152
Trane DDC VAV Controller Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Tracer™ Programmable BACnet Controller — Unit Control Module . . . . 158
Trane LonMark DDC VAV Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Trane DDC VAV Controller Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
VAV-PRC012-EN 3
4
LonMark™ Direct Digital Controller—Unit Control Module . . . . . . . . . . . 166
Direct Digital Controller—Unit Control Module . . . . . . . . . . . . . . . . . . . . . 169
Wireless Receiver/Wireless Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 172
2
Wall Sensor and Duct CO
2
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Factory or Field Wired Auxiliary Temperature Sensor . . . . . . . . . . . . . . . 178
Trane Actuator – 90 Second at 60 Hz Drive Time . . . . . . . . . . . . . . . . . . . . 183
Belimo Actuator – 95 Second Drive Time . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Energy Savings & System Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Flow Measurement and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Additional VAV System and Product References . . . . . . . . . . . . . . . . . . . . 233
VAV-PRC012-EN
Features and Benefits
VariTrane™– VAV Leadership
VariTrane variable-air-volume (VAV) units lead the industry in quality and reliability and are designed to meet the specific needs of today’s applications. This generation of VariTrane units builds upon the history of quality and reliability and expands the products into the most complete
VAV offering in the industry.
Parallel Fan-powered units offer energy savings due to intermittent fan control. The fan energizes only in heating mode when the space needs heat. Additional energy savings are obtained by using warm plenum air for free reheat. Motor heat is never wasted in parallel units. They are an excellent choice when minimal zone heating is needed.
Series fan-powered units have fans which are always energized in occupied mode. They are common in applications such as conference rooms, cafeterias, etc., that desire constant airflow rates at all conditions.
Low-height parallel units provide the energy savings of an intermittent fan with the flexibility of an 11"–11.5” casing height. This is a good choice for tight plenum spaces.
Low-height series units have been used for years in projects with strict plenum height requirements. Units are available in 11.0" height.
Energy Efficient Earthwise™ Systems
Figure 5.
Rooftop VAV (office building)
VAV-PRC012-EN
A significant consumer of energy in commercial buildings is heating and air conditioning. One of the most energy-efficient HVAC solutions is the VAV system.This inherent system efficiency, along with high-quality, affordable DDC controls, has steadily increased demand for VAV systems over the years. VAV systems save significant energy, are able to deliver the required amount of ventilation air, and provide reliable occupant comfort.
Energy saving features must go beyond a simpleVAV unit to incorporateVAV unit level and system level control strategies like:
• Ventilation Optimization-Combines demand-controlled ventilation (using either a time-of-day schedule, an occupancy sensor, or a carbon dioxide sensor) at the zone level with ventilation reset at the system level to deliver the required amount of outdoor air to each zone, while minimizing costly over-ventilation.
5
Features and Benefits
• Fan Pressure Optimization- reduces supply fan energy by as much as 40% by intelligently reducing the pressure in the air distribution system to the lowest possible level without impacting occupant comfort.
• Night setback reduces energy consumption during unoccupied periods by raising or lowering space temperature setpoints.
• Supply AirTemperature Reset-reduces overall system energy use (balancing reduced cooling and reheat energy with increased fan energy) by raising the supply air temperature at part load, while avoiding elevated space humidity levels.
• Electrically Commutated Motors (ECM) improve the efficiency of fan-powered VAV units.
• LowTemperature Air Distribution can decrease overall system energy use by reducing airflows and the fan energy needed to move that air through the system.
To determine the potential energy savings a VAV system can bring to your applications, Trane offers energy-modeling software like System Analyzer™ and TRACE 700
®
. When TRACE™ was introduced into the HVAC industry in 1972, the HVAC design and analysis program was the first of its kind and quickly became a defacto industry standard. It continues to grow with the industry meeting requirements for ASHRAE Standard 140, ASHRAE 90.1, and the LEED® Green Building
Rating System and has now been approved by the IRS to certify energy savings for building owners. Contact your local Trane Sales Engineer for additional information.
Control Flexibility—Trane factory installs more VAV controllers than any other manufacturer in the industry. In addition to
Trane DDC controls and simple factory-mounting of non-Trane VAV controllers,
Trane now offers a LonMark™ controller that is completely factory-commissioned to maximize installation quality and system reliability. Labor savings are maximized with
Trane factory-commissioned controllers.
Accurate Flow Ring—Housed and recessed within the air valve to provide flow ring handling/shipping protection.
The patented flow ring provides unmatched airflow measurement accuracy.
Rugged Air Valve—Trane air valves are heavy gage steel with a continuously welded seam to limit inlet deformation.
This provides consistent and repeatable airflow across the flow ring with performance you can count on.
Technologically Advanced "S
Units— New super-quiet (SQ fan/motor/wheel assemblies engineered as an air deliver system to provide the most efficient design available in industry. For quiet comfort y can trust, rely on Trane SQ u
Service Friendly:
* Internal shaft visible through control box cover sight hole for blade orientation verification.
* Same-side NEC jumpback clearance—
Tough Interlocking Panels— Rug and rigidity are assured with Tra patent-pending interlocking pan provides all high- and low-voltage components on the same side to minimize field labor.
* SQ fan-powered units have improved accessability to
Superior Metal Encapsulated
VariTrane Units are complete encapsulated edges to arrest fibers and prevent erosion in internal components. Sliding panels are standard which improve safety and allow
Optional Narrow Corridor unit servicing with a single configuration — designed to minimize building technician.
Meets all NEC jumpback clearance requirements for these extra-tight areas. Narrow Corridor
or cleanability, Trane has a complete line of insulation options, incl
double-wall, matte-faced, foil-faced, closed cell, etc.
Configuration not pictured here. Refer to Series
Fan-Powered dimensional data for reference drawings.
6 VAV-PRC012-EN
Features and Benefits
Construction
UL-listed products—
Safety and reliability are vital in commercial construction. All VariTrane units are completely listed in accordance with UL -1995 as terminal units.This listing includes the VAV terminal with electric heaters. Additionally, all insulation materials pass UL 25/50 smoke and flame safety standards.
AHRI Certified Performance—
All VariTrane units are AHRI certified. AHRI 880 guarantees the pressure drop, flow performance, and acoustical performance provided is reliable and has been tested in accordance with industry accepted standards. AHRI 885 uses AHRI 880 performance and applies accepted industry methods to estimate expected “NC” sound levels within the occupied space.
Casing Design—
Interlocking Panels—VariTrane products are manufactured in the most state-of-the-art VAV facility in the world. The patent-pending interlocking panels are designed using integral I-beam construction technology. This limits deformation and creates tremendous product rigidity. An additional benefit is a smooth unit exterior with few exposed screws—ideal for exposed ceiling applications. VariTrane units are designed for use in systems that operate up to 5" w.c. of inlet pressure.
Metal Encapsulated Edges—AllVariTrane units are complete with encapsulated edges to arrest cut fibers and prevent insulation erosion into the airstream.This is the standard of care in applications concerned with fiberglass erosion or projects with either double-wall or externally wrapped duct work.
The Trane Air Valve—is at the heart of VariTrane terminal units. This is where airflow is measured and controlled.
Repeatability and ruggedness is vital.VariTrane products are the most rugged and reliable available.
18-gage Cylinder—limits deformation or damage during shipment and job site handling, and provides even airflow distribution across the flow ring for unmatched airflow measurement accuracy.
Continuously Welded Seam — an automated weld process creates the highest quality continuous seam, which is “right” every time. The welded seam improves air valve rigidity and creates consistent and repeatable airflow across the flow measurement device.The result is a truly round cylinder every time, with no flat spots caused by lower quality crimping and riviting technologies.
Flow Ring—The Trane flow ring is time tested to perform under the most demanding conditions. Additionally,Trane’s patented flow ring is recessed within the air valve cylinder to reduce the potential for damage during job site handling and installation.
VAV-PRC012-EN 7
Features and Benefits
External Shaft—The simple design provides controller flexibility and is designed to facilitate actuator field replacement.
Position Indicator—The position indicator shows current air valve position to aid in system commissioning. Many times this can be seen from the floor without climbing a ladder.
External Actuator—This feature increases serviceability, control system compatibility, and actuator clutch access for simplified commissioning.
Indoor Air Quality (IAQ) Features
The oil embargo of the early 1970s created an energy crisis, which resulted in tighter buildings, and reduced ventilation rates. A fallout issue of tighter building construction was poor indoor air quality. This heightened IAQ awareness. IAQ issues have been featured in publications from the smallest towns to the largest cities. System design should consider applicable ventilation and IAQ standards.(See your localTrane Sales Engineer or visit www.trane.com for additional information).
Good indoor air quality results from units and systems which:
• Provide the required amount of ventilation air to each zone during all operating conditions
• Limit particulates from entering occupied spaces
• Allow proper access for periodic cleaning.
8
Note:
Access made easy on new VariTrane units, as shown on this Series Fan-Powered unit.
VariTrane units are designed with simplified access and a full line of insulation options including:
Matte-faced—Typical industry standard with reduced first cost.
Closed-cell—This insulation has an R-value and performance equivalent to matte-faced insulation.
The main difference is the reduction of water vapor transmission. Closed-cell is designed for use in installations with a high chance of water formation. (It has been used to coat the exterior of chiller evaporator barrels for many years.)
Foil-faced—A fiberglass insulation with a thin aluminum coating on the air stream side to prevent fibers from becoming airborne.The aluminum lining is acceptable for many applications, however it is not as rugged as double-wall
Double-wall—Premium insulation often used in many health care applications with insulation locked between metal liners. This eliminates the possibility for insulation entering the airstream and allows for unit interior wipe-down as needed.
VariTrane VAV units are the most prepared IAQ units in the industry.
The end result is a reliable product designed for peak performance, regardless of job site conditions or handling.
VAV-PRC012-EN
Features and Benefits
Tracer™ Building Automation System
Tracer Building Automation System assures comfort within your building. Building controls have a bigger job description than they did a few years ago. It’s no longer enough to control heating and cooling systems and equipment. Sophisticated buildings require smarter technology that will carry into the future. Tracer™ controls provide the technology platform – mobile, easy-to-use, cloud-based, scalable and open - for the next generation of data-driven, technology-enabled services that are creating high performance buildings. With a Trane Tracer Building Automation
System, you’ll:
• Reduce operating costs through energy management strategies
• Consistently provide occupant comfort
• Enjoy reliable operation with standard, pre-engineered and pretested applications
• Easily troubleshoot and monitor either on site or from a remote location
• Reduce installation time and simplify troubleshooting
Whether factory-mounted or field-installed,Trane offers a wide range of controllers to suit virtually any application.These units are compatible with a variety of building types and can be used for new construction or renovation. Through extensive usability testing internally and with building operators, we’ve designed our controls for real world ease of use.
(Additional control options and sequence-of-operations are located in the “Controls” section.)
Trane VAV UCM DDC Controller
DDC (communicating electronic)—DDC controllers are today’s industry standard. DDC controllers provide system-level data used to optimize overall SYSTEM performance.
Variables such as occupied/unoccupied, minimum and maximum cfm and temperature, valve position, ventilation fraction, etc. are available on a simple twistedshielded wire pair. For additional information, see “Industry Issues: Energy Efficiency”.
Note:
One of many Trane DDC Control Options which are factory-installed, wired, calibrated, and fully tested before shipment.
Trane DDC controllers provideTrane-designed solid-state electronics intended specifically for VAV temperature control in space comfort applications. DDC control capabilities include:
• Pressure-independent (PI) operation—Provides airflow required by the room thermostat to maintain occupant comfort. The controller automatically adjusts valve position to maintain required airflow. Minimum and maximum airflow is factory-set and field-adjustable.
• Factory-set airflow and temperature setpoints
• Most advanced system integration in the industry.
Tracer VV550 LonTalk™ Controllers
LonTalk™ Controller
Trane now offers a full line of LonTalk™ controllers designed for simple integration into ANY system which can communicate via the LonMark Space Comfort Control (SCC) protocol. These controllers are also completely factory-commissioned.
VAV-PRC012-EN 9
Features and Benefits
Tracer BACnet™ Controllers
Trane now offers a full line of BACnet controllers designed for simple integration into any system which can communicate via the BACnet protocol.These controllers are factory-commissioned and shipped ready to be installed.
UC210 BACnet Controller
UC400 BACnet Controller
Trane Wireless Comm Interface (WCI)
WCI controller
Trane Wireless Zone Sensor
Provides wireless communication between the Tracer SC,
Tracer Unit Controllers, and BACnet™ Communication
Interface (BCI) modules.
The Trane WCI is the perfect alternative to Trane’s BACnet wired communication links (for example – Comm links between a Tracer SC and Tracer UC400).
Eliminating communication wire used between terminal products, zone sensors, and system controllers has substantial benefits.
• Installation time and associated risks are reduced.
• Projects are completed with fewer disruptions.
• Future re-configurations, expansions, and upgrades are easier and more cost effective.
Wireless Zone Sensor
Provides wireless communication between the Unit Controller and the zone sensor. This is an alterntive to the wired zone sensor when access and routing of communicaiton cable is an issue. It also allows very flexible mounting and relocation of zone sensors
10 VAV-PRC012-EN
Pneumatic Controller
Pneumatic Controller
Features and Benefits
Pneumatic—Pneumatic controllers provide proven reliability and performance. A full line of options provide:
• Highest quality PVR available, which maximizes zone temperature control.
Pressure-independent operation
• AllVariTrane pneumatic controllers use the patented flow sensor input to provide the most accurate performance available.
Binary Input Controller
Integration Options (Interfacing with other control systems) - Trane offers three ways to interface with other control systems.
1.
Use Trane LonMark, factory-commissioned VAV controllers
2. Use Trane Binary Input Controller (BIC). BIC allows system control through binary logic. This means that a control system on an existing campus, or those seeking “Analog noncommunicating control” can control aTrane DDCVAV unit via basic binary contact closures, like relays, etc. This can be a cost effective interface option where a full Trane DDC VAV System is not available.
3. Use Trane BACnet™ factory-commissioned VAV controllers.
Factory-installed vs. Factory-commissioned:
The terms factory-installed and factory-commissioned are often used interchangeably.Trane takes great pride in being the industry leader in factory-commissioned DDC controllers.
differentiates these concepts.
Factory-commissioned controllers provide the highest quality and most reliable units for yourVAV system. Additional testing verifies proper unit operation including occupied/unoccupied airflow, temperature setpoints, communication link functionality, and output device functionality. The benefits of factory-commissioning are standard on VariTrane terminal units with Trane DDC controls. This means that factory-commissioned quality on VariTrane VAV units is now available on ANY manufacturer’s control system that can communicate using the LonMark Space Comfort
Control (SCC) protocol. (See Controls section for complete listing of variables which are communicated.
Table 1.
Factory-installed vs. factory-commissioned
Transformer installed (option)
Wires terminated in reliable/consistent setting
Controller mounted
Electric heat contactors and fan relay wired
Factory-installed
X
X
X
X
Factory-commissioned
X
X
X
X
VAV-PRC012-EN 11
Features and Benefits
Table 1.
Factory-installed vs. factory-commissioned
Factory-installed
Testing of electric heat contactors and fan relay
Controller addressing and associated testing
Minimum & Maximum airflows settings (occupied/unoccupied)
Minimum & Maximum temperature setpoints (occupied/unoccupied)
Minimum ventilation requirements
Thumbwheel enable/disable
Heating offset
Wireless communications modules (WCI)
Wireless zone sensor
X
X
Indoor Air Quality Management During Construction
Factory-commissioned
X
X
X
X
X
X
X
X
LEED wrap option is a pressure sensitive covering that prevents contamination of the
VAV box during the construction phase. It is utilized to seal all openings without constraining the installation process.
Trane VAV Systems - Proven Performance
Trane is the industry leader in VAV systems, including factory-commissioned controls and integration with other control systems. This leadership began with customers seeking the most reliable VAV products in the industry. The solution was factory-commissioned controls (see
Factory-installed vs. Factory-commissioned). Since then, it has blossomed to include optimized system control strategies.
Control strategies are often made more complicated than necessary. VariTrane DDC controls simplify control strategies by pre-engineering control logic and sequencing into the controller.This
information is available via a twisted-shielded wire pair, and accessible via a Trane Tracer™ SC building automation system. Data is easily accessed via a computer workstation.
Optimized system control strategies, such as ventilation optimization, fan-pressure optimization, and optimal start/stop, are pre-engineered in VariTrane™ unit-level DDC controllers and theTracer
SC building automation system.
This allows a Trane VAV system to meet or exceed the latest ASHRAE 90.1 Energy Efficiency standards. Pre-engineered controls allow consistent, high quality installations which are very repeatable. The end result is PROVEN control strategies you can rely on to perform. For more information on these and other control strategies, contact your local Trane Sales Office, or visit www.trane.com.
Purchasing VAV controllers and VAV hardware from a single manufacturer provides a single contact for all HVAC system related questions.
12 VAV-PRC012-EN
Agency Certifications
There are numerous regulations and standards in the industry that determine the construction and performance parameters for VAV terminal units. Some of the more important of those standards and regulations are listed below, along with a brief description of what each one addresses.
American Society of Heating, Refrigerating and Air-conditioning Engineers
(ASHRAE) - 41.1
ASHRAE - 41.2
ASHRAE - 41.3
These standards specify methods for temperature measurement (41.1), laboratory airflow measurement (41.2), and pressure measurement (41.3). While none of these standards specifically discusses VAV air terminals, they discuss topics that are aspects of terminal box systems.
Therefore, some engineers will include these standards in their specifications as a primer on accepted measurement techniques.
ASHRAE - 62
This standard specifies the minimum ventilation rates and indoor air quality that are acceptable for occupied spaces.
ASHRAE - 111
This standard calls out procedures to be followed for testing and balancing HVAC systems. It includes descriptions of the equipment used, procedures followed, and field changes that must be made when a system is balanced.
Air-Conditioning, Heating and Refrigeration Institute (AHRI)
AHRI 880
This standard sets forth classifications, performance testing requirements, and test results reporting requirements for air terminal units.The standard contains very detailed procedures that are to be followed for the testing and certification program associated with this standard. This is one of the most commonly referenced standards in the VAV terminal unit industry.The AHRI-880 certification program is designed to police the accuracy of documented performance for terminal units. The certification program requires a sampling of at least four units be tested annually. The tested units are chosen at random by AHRI and sent to an independent laboratory for the testing.
The performance is tested at one specific operating condition.The operating characteristics tested include discharge and radiated sound power (for the damper and, in the case of fan-powered boxes, the fan), wide-open damper pressure drop, and fan motor amp draw. VariTrane terminal
units are certified according to AHRI-880.
AHRI 885
This document provides a procedure to estimate sound pressure levels in an occupied space.The
standard accounts for the amount of sound pressure in the space due to the VAV air terminal, diffusers and their connecting low pressure ductwork. While sound generated from the central system fan and ductwork may be a significant factor in determining the sound pressure level in the room, this standard does not address those factors. It focuses solely on theVAV terminal and items downstream of it. This standard is related to AHRI-880 by using sound power determined using
AHRI-880 methodology as a starting point for the AHRI-885 procedure.
Underwriter’s Laboratory (UL) 1995
Underwriter’s Laboratory is an independent testing agency that examines products and determines if those products meet safety requirements. Equipment manufacturers strive to meet
UL guidelines and obtain listing and classifications for their products because customers recognize
UL approval as a measure of a safely designed product. VariTrane VAV air terminals are listed
per UL-1995, Heating and Cooling Equipment.The terminals are listed as an entire assembly.
VAV-PRC012-EN 13
Agency Certifications
National Fire Protection Association
NFPA 70
This standard is also known as the National Electrical Code (NEC). The Code gives standards for installation of wiring and electrical equipment for most types of commercial and residential buildings. It is often referred to inVAV air terminal specifications when fan-powered boxes, electric heat or electric controls are included.
NFPA 90A
This standard does not speak directly to VAV air terminals but does discuss central system considerations pertaining to a fire and/or smoke condition. The standard discusses safety requirements in design and construction that should be followed to keep the air-handling system from spreading a fire or smoke.The standard specifies practices that are intended to stop fire and smoke from spreading through a duct system, keep the fire-resistive properties of certain building structures (fire walls, etc.) intact, and minimize fire ignition sources and combustible materials.
14 VAV-PRC012-EN
Model Number Descriptions
Digit 1, 2—Unit Type
VP = VariTrane™ Fan-Powered Parallel
VS = VariTrane Fan-Powered Series
LP = VariTrane Fan-Powered
Low-Height Parallel
LS = VariTrane Fan-Powered
Low-Height Series
Digit 3—Reheat
C = Cooling Only
E = Electric Heat
W = Hot Water Heat
Digit 4—Development Sequence
F = Sixth
Digit 5, 6—Primary Air Valve
05 = 5" inlet (350 max cfm)
06 = 6" inlet (500 max cfm)
08 = 8" inlet (900 max cfm)
10 = 10" inlet (1400 max cfm)
12 = 12" inlet (2000 max cfm)
14 = 14" inlet (3000 max cfm)
16 = 16" inlet (4000 max cfm)
RT = 8" x 14" inlet (1800 max CFM)
Note:
10, 12, 14, 16 Not Available on Low-
Height
Digit 7, 8—Secondary Air Valve
00 = N/A
Digit 9—Fan
P = 02SQ fan (500 nominal cfm)
Q = 03SQ fan (1100 nominal cfm)
R = 04SQ fan (1350 nominal cfm)
S = 05SQ fan (1550 nominal cfm)
T = 06SQ fan (1850 nominal cfm)
U = 07SQ fan (2000 nominal cfm)
V = 08SQ Fan (500 nominal cfm)
W = 09SQ Fan (900 nominal cfm)
X = 10SQ Fan (1800 nominal cfm)
Digit 10, 11—Design Sequence
** = Factory assigned
Digit 12, 13, 14, 15—Controls
DD01= Cooling Only Control
DD02= N.C. On/Off Hot Water
DD03= Prop. Hot Water
DD04= Staged On/Off E-Heat
DD05= Pulse Width Mod of E-Heat
DD07= N.O. On/Off Hot Water
DD11= VV550 DDC Controller - Cooling
Only
DD12= VV550 DDC Ctrl w/N.C. On/Off
HW Valve
DD13= VV550 DDC Ctrl w/Prop. HW
Valve
DD14= VV550 DDC Ctrl - On/Off
Electric Heat
DD15= VV550 DDC Ctrl w/Pulse Width
Modulation
DD17= VV550 DDC Ctrl w/N.O. On/Off
HW Valve
DD23= VV550 DDC- Basic plus- Local
(Electric heat- PWM) Remote
(Staged EH)
DD28= VV550 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
DD29= VV550 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
DD30= VV550 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
DD31= VV550 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
DD32= VV550 DDC-Basic plus- Local
(Electric heat- Staged) Remote
(Staged EH)
DD41= UC400 DDC-Basic (No water or electric heat)
DD42= UC400 DDC-Basic (Water heat-
Normally Closed- 2 position)
DD43= UC400 DDC-Basic (Water heat-
Modulating)
DD44= UC400 DDC-Basic (Electric heatstaged)
DD45= UC400 DDC-Basic (Electric heat-
PWM)
DD47= UC400 DDC-Basic (Water heat-
Normally Opened- 2 position)
DD53= UC400 DDC-Basic plus- Local
(Electric heat- PWM) Remote
(Staged EH)
DD58= UC400 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.O. 2-position)
DD59= UC400 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.C. 2-position)
DD60= UC400 DDC-Basic plus- Local
(Water heat- N.O. 2-position)
Remote (Water- N.C. 2-position)
DD61= UC400 DDC-Basic plus- Local
(Water heat- N.C. 2-position)
Remote (Water- N.O. 2-position)
DD62= UC400 DDC-Basic plus- Local
(Electric heat- Staged) Remote
(Staged EH)
DD65= Basic (Electric Heat- Modulating
SCR)
DD66= Basic plus – Local (Electric heat –
Modulating SCR) Remote
(Staged EH)
DD71= UC210 DDC-Basic
(Cooling only)
DD72= UC210 DDC-Basic
(Water heat-nc 2pos)
DD73= UC210 DDC-Basic
(Water heat-Modulating)
DD74= UC210 DDC-Basic
(Electric heat-staged)
DD75= UC210 DDC-Basic
(Electric heat-pwm)
DD77= UC210 DDC-Basic
(Water heat-NO 2pos)
DD83= UC210 DDC-Basic+ Local
(Electric heat-pwm)
Remote (Staged)
VAV-PRC012-EN
DD84= UC210 DDC-Basic+ Local
(Water heat Modulating)
Remote (Water-NC 2pos)
DD85= UC210 DDC-Basic+ Local
(Water heat Modulating)
Remote (Water-NO 2pos)
DD86= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-Modulating)
DD87= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-Modulating)
DD88= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-NO 2pos)
DD89= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-NC 2pos)
DD90= UC210 DDC-Basic+ Local
(Water heat NO 2pos)
Remote (Water-NC 2pos)
DD91= UC210 DDC-Basic+ Local
(Water heat NC 2pos)
Remote (Water-NO 2pos)
DD92= UC210 DDC-Basic+ Local
(Electric heat-staged)
Remote (Staged)
DD95= UC210 DDC-Ctrl w/Modulating
SCR
DD96= UC210 DDC-Space Temp Ctrl w/
Local SCR & Remote Stge Elec
Heat
DD00= Trane Actuator Only
ENCL= Shaft Only in Enclosure
ENON= Shaft Out Side for Electric Units
FM00= Other Actuator and Control
FM01= Trane supplied actuator, other control
PN00= N.O. Actuator and Linkage Only
PN05= N.O. 3000 Series, RA Stat
PN51= Pneumatic normally open w/3011,DPS fan
PN52= Pneumatic normally open w/3011, DPM fan
PNON= Shaft Out Side for Pneumatic
Units
N.C. = Normally-closed
N.O. = Normally-opened
DA Stat = Direct-acting pneumatic t-stat
(by others)
RA Stat = Reverse-acting pneumatic t-stat (by others)
PN = Pneumatic
FM = Factory installation of customersupplied controller
PVR = Pneumatic Volume Regulator
Digit 16—Insulation
A = 1/2” Matte-faced
B = 1" Matte-faced
D = 1" Foil-faced
F = 1" Double-wall
G = 3/8” Closed-cell
Digit 17—Motor Type
D = PSC Motor
E = High-efficiency motor (ECM)
15
Model Number Descriptions
Digit 18—Motor Voltage
1 = 115/60/1
2 = 277/60/1
3 = 347/60/1
4 = 208/60/1
5 = 230/50/1
Digit 19—Outlet Connection
1 = Flanged
2 = Slip & Drive
Digit 20—Attenuator
0 = No Attenuator
W = With Attenuator
Digit 21—Water Coil
0 = None
1 = 1-Row–Plenum inlet installed RH
2 = 2-Row–Plenum inlet installed RH
3 = 1-Row–Discharge installed, LH
4 = 1-Row–Discharge installed, RH
5 = 2-Row–Discharge installed, LH
6 = 2-Row–Discharge installed, RH1
A = 1-Row–Premium water coil inlet
B = 2-Row–Premium water coil inlet
C = 1-Row–Premium hot coil on discharge, LH
D = 1-Row–Premium hot coil on discharge, RH
E = 2-Row–Premium hot coil on discharge, LH
F = 2-Row–Premium hot coil on discharge, RH
Note:
1- and 2-row not available with
Low-Height
Digit 22—Electrical Connections
L = Left (Airflow hitting you in the face)
R = Right (Airflow hitting you in the face)
W = Narrow Corridor LH, Hi-Volt Inlet
Facing
X = Narrow Corridor RH, Hi-Volt Inlet
Facing
Note:
(W & X) Fan Powered Series Only
Digit 23—Transformer
0 = N/A (provided as standard)
Digit 24—Disconnect Switch
0 = None
W = With
Electric Reheat w/ door interlocking power disconnect, Cooling Only and
Water Reheat w/ toggle disconnect
Digit 25—Power Fuse
0 = None
W = With
Digit 26—Electric Heat Voltage
0 = None
A = 208/60/1
B = 208/60/3
C = 240/60/1
D = 277/60/1
E = 480/60/1
F = 480/60/3
G = 347/60/1
H = 575/60/3
J = 380/50/3
K = 120/60/1
Note:
K not available with Low Height
Digit 27, 28, 29—Electric Heat kW
000 = None
050 = 0.5 kW
010 = 1.0 kW
015 = 1.5 kW
260 = 26.0 kW
Note:
Electric Heat Voltage -
0.5 to 8.0 kW–½ kW increments
8.0 to 18.0 kW –1 kW increments
18.0 to 46.0 kW–2 kW increments
Digit 30—Electric Heat Stages
0 = None
1 = 1 Stage
2 = 2 Stages Equal
3 = 3 Stages Equal
Note:
3 not available with Low Height
Digit 31—Contactors
0 = None
1 = 24-volt magnetic
2 = 24-volt mercury
3 = PE with magnetic
4 = PE with mercury
5 = SCR heat UC400
6 = SCR heat FMTD/ENCL/DD00
Note:
SCR cannot be selected with the following configuration:
•
KW > 10, 208 volt 3 phase, Low
Height
•
KW > 22, 480 volt 3 phase, Low
Height
•
Voltage = 575 volt
Digit 32—Airflow Switch
0 = None
W = With
Digit 33—Not Used
0 = N/A
Digit 34—Actuator
0 = Standard
A = Belimo actuator
Digit 35—Wireless Sensors
0 = None
1 = Factory Mounted Wireless
Receiver (Sensor Assembly)
2 = Wireless Comm Interface
Modular FM
Note:
All sensors selected in accessories
Digit 36—Pre-Wired Factory
Solutions
0 = None
1 = Factory Mounted DTS
2 = HW Valve Harness
3 = Both DTS & HW Valve Harness
16 VAV-PRC012-EN
Selection Procedure
This section describes elements and process required to properly select fan-powered VAV terminals, and includes a specific examples. Selection procedure is iterative in nature which makes computer selection desirable. Selection of fan-powered VAV terminals involves four elements:
• Air valve selection
• Heating coil selection
• Fan size and selection
• Acoustics
Note: Use the same procedures for selecting Low-Height Fan-Powered Units.
Air Valve Selection
Provided in the Performance Data—Air Pressure Requirements section of the catalog is the unit air pressure drop at varying airflows.To select an air valve, determine the airflow required at design cooling. Next, select an air valve diameter that will allow proper airflow modulation, (a velocity of
1600 – 2000 FPM is recommended). Keep in mind that modulation below 300 FPM is not
recommended. Proper selection requires defining the minimum valve airflow (in either heating or cooling) and maintaining at least 300 FPM through the air valve.The minimum is typically set based on ventilation requirements. If zone ventilation does not come through the VAV unit, a minimum valve position can also be zero.
Heating Coil Selection
Supply Air Temperature
The first step required when selecting a heating coil is to determine the heating supply air temperature to the space, calculated using the heat transfer equation. A recommended value is
90°F, although values between 85°F and 95°F are common. Discharge air temperatures that exceed
20 degrees above space temperature are not recommended for proper diffuser operation. Air temperature difference is defined as the heating supply air temperature to the space minus the winter room design temperature.The zone design heat loss rate is denoted by the letter Q. Supply air temperature to the space equals the leaving air temperature (LAT) for the terminal unit.
Coil Leaving Air Temperature
Once the terminal unit LAT is determined, the heating requirements for the coil can be calculated.
The leaving air temperature for the coil of a parallel fan-powered terminal unit varies based on the type of unit installed heat being selected. Series unit leaving air temperatures do not vary because in each case the coil is located on the unit discharge.
Electric coil LAT equals terminal unit LAT because the coil is located on the unit discharge. Hot water coils can be located on either the discharge or, for maximum system efficiency, the plenum inlet when located on the entering air side of the fan. Coil LAT is calculated using a mixing equation.
Given the unit heating airflow and LAT, minimum primary airflow at its supply air temperature, and the volume of heated plenum air, the leaving air temperature for the hot water coil can be determined (see the unit selection example that follows for more details).
Coil Entering Air Temperature
The entering air temperature (EAT) to the coil also varies based on the coil position on the unit for parallel units.The unit heat is mounted on the discharge of a series unit.Therefore the EAT equals the temperature of blended primary and plenum air.
Parallel electric coils are mounted on the unit discharge. Hot water coils can be mounted on the discharge or on the plenum inlet. Plenum inlet mounting creates a more efficient VAV system.This
is because the parallel fan is energized only when in heating mode, and thus, when in cooling mode, the water coil is not in the airstream.
The EAT for discharge mounted coils equals the temperature of blended primary air and plenum air. For plenum inlet mounted water coils, the EAT equals the plenum air temperature.
VAV-PRC012-EN 17
Selection Procedure
Fan Size and Selection
Fan Airflow
Fan airflow is determined by calculating the difference between the unit design heating airflow and minimum primary airflow.
Fan External Static Pressure
Fan external static pressure is the total resistance experienced by the fan, which may include downstream ductwork and diffusers, heating coils, and sound attenuators. As total airflow varies so will static pressure, making calculation of external static pressure dependent on unit type.
In many applications of parallel terminals, a minimum primary airflow must be maintained to meet ventilation requirements. This primary airflow contributes to the total resistance experienced by the fan and should be accounted for in all components downstream of the fan itself, including electric coils. Hot water coils positioned on the fan inlet are not affected by the additional primary airflow.The static pressure resistance experienced by the fan due to the hot water coil is based on fan airflow only, not the total heating airflow.
With series fan-powered terminal units, all airflow passes through the fan. External static pressure requirements are the sum of the individual component pressure retirements at the design airflow of the unit.
Fan Motor Type
The fan motor type that will be used for the unit will need to be known before fan selection can begin.The ECM motor offers more efficient operation than the standard single-speed PSC motor and will use different fan curves. Because series fans operate in both heating and cooling mode, payback is typically 2–3 years for the premium ECM option. Refer to the Features and Benefits section to determine which motor is more appropriate for the unit
Selection
Once fan airflow and external static pressure are determined, reference the fan curves in the performance data section. Cross plot both airflow and external static pressure on each applicable graph. A selection between the minimum and maximum airflow ranges for the fan is required.
It is common to identify more than one fan that can meet the design requirements. Typically, selection begins with the smallest fan available to meet capacity. If this selection does not meet acoustical requirements, upsizing the fan and operating it at a slower speed can be done for quieter operation.
Acoustics
Capacity Requirement
Once both coil EAT and LAT are determined, the heat transfer (Q) for the coil must be calculated using the heat transfer equation. For electric heat units, the Q value must be converted from Btu to kW for heater selection. The required kW should be compared to availability charts in the performance data section for the unit selected. For hot water heat units, reference the capacity charts in the performance data section for the required heat transfer Q and airflow to pick the appropriate coil.
Air Valve Generated Noise
To determine the noise generated by the air valve, two pieces of information are required; design airflow and design air pressure drop. The design air pressure drop is determined by taking the difference between design inlet and static pressure (the valve’s most over-pressurized condition) and external static pressure at design cooling flow. This represents a worst-case operating condition for the valve.
18 VAV-PRC012-EN
Selection Procedure
Fan Generated Noise
To determine fan noise levels, fan airflow, external static pressure and speed information is required.
Evaluation Elements
For parallel fan-powered terminal units, the air valve and fan operation must be evaluated separately because these operations are not simultaneous. For Series fan-powered units, the air valve and fan are evaluated together because they have simultaneous operation. Access the appropriate acoustics table(s) of the catalog and determine the sound power and NC prediction for both the discharge and radiated paths. It is important to understand that discharge air noise is generally not a concern with fan-powered terminals. Radiated noise from the unit casing typically dictates the noise level of the space. If the entire unit or any element of it is generating noise in excess of the Noise Criteria requirements, the size of the appropriate portion of the terminal should be increased. Because the selection procedure is iterative, care should be taken by the designer to confirm that the change in selection does not affect other elements of the unit or system design.
Selection Example—Parallel With Hot Water Heat
Air Valve Selection
Design Cooling Airflow:1000 cfm
Minimum Ventilation Airflow: 200 cfm
Maximum Unit APD: 0.25 in. wg
Choose 10" air valve
Check – Is minimum airflow above 300 FPM? Guidelines, FPP 8)
A 10" air valve is selected with unit pressure drop = 0.01 in. wg
Heating Coil Selection
Required Information:
Zone design heat loss: 20000 Btu
Unit heating airflow: 600 cfm
Winter room design temp.: 68ºF
Coil entering water temp.: 180ºF
Minimum primary airflow: 200 cfm
Fan Airflow: 400 cfm
Plenum temperature: 70ºF
Coil flow rate: 2 gpm
Primary air temperature: 55ºF
Heat Transfer Equation (Btu)
Q = 1.085 x Cfm x D Temperature
For the heating zone, the temperature difference is the zone supply air temperature (SAT) minus the winter room design temperature.
18000 Btu = 1.085 x 600 x (SAT - 68ºF)
SAT = 95.6ºF
Because the designer chose to maximize system efficiency by having the hot water coil on the plenum inlet, the unit supply air temperature is equal to the mix of the heated plenum air from the fan and the minimum primary airflow.
600 cfm x 95.6ºF =
200 cfm x 55ºF +
(600 cfm - 200 cfm) x Coil LAT
Coil LAT = 116ºF
VAV-PRC012-EN 19
Selection Procedure
For the heating coil, the temperature difference is the calculated coil LAT minus the coil EAT
(Plenum Air Temperature).
Coil Q = 1.085 x 400 x (116-70) = 19,964 Btu = 19.96 Mbh
Coil Performance Table
Selection:
Size 02SQ fan, 1-row coil with 2 gpm =20.53 Mbh (at 400 cfm)
1-row coil with 2 gpm = 2.57 ft WPD
Fan Selection
Required Information:
Design airflow: 400 cfm
Downstream static pressure at design airflow: 0.25 in. wg
Fan external static pressure equals downstream static pressure (ductwork and diffusers) plus coil static pressure.The coil static pressure that the fan experiences is at the fan airflow (400 cfm).The
downstream static pressure the fan experiences is at fan airflow plus minimum primary airflow.
The sum of fan airflow and minimum primary airflow (600 cfm) is less than design airflow (1000 cfm) and therefore the 0.25 in. wg downstream static pressure at design airflow must be adjusted for the lower heating airflow.
Parallel Fan-Powered Unit with Water Coil (2 Options)
Plenum Inlet Mounted
Discharge Mounted
20
Using Fan Law Two:
Heating Downstream Static Pressure = (600/1000)2 x 0.25 = .09 in. wg
A size 02SQ fan has the capability to deliver approximately 650 cfm at 0.09 downstream static pressure. If an attenuator is required, use the attenuator air pressure drop tables to define additional fan static pressure.
Acoustics
Required Information:
Design inlet static press.: 1.0 in. wg
NC criteria: NC-35
The selection is a VPWF Parallel Fan-powered Terminal Unit, 10" primary, parallel fan size 02SQ, with a 1-row hot water coil.
Determine the casing radiated noise level because it typically dictates the sound level (NC) of the space. With a parallel unit, two operating conditions must be considered, design cooling and design heating.
VAV-PRC012-EN
VAV-PRC012-EN
Selection Procedure
Design Cooling (1000 cfm). Radiated valve typically sets the NC for parallel units in cooling mode.
The closest tabulated condition (1100 cfm at 1.0 in. wg ISP) has an NC=31. (A more accurate selection can be done via TOPSS electronic selection program.):
Table 2.
Selection Program Output (Radiated Valve):
Octave Band 2 3 4 5 6 7 NC
Sound Power 65 60 53 48 41 32 30
Design Heating (200 cfm valve, 400 cfm fan, 0.25 in. wg DSP). Radiated fan typically sets the NC for parallel units in heating mode.The closest cataloged condition (430 fan cfm , 0.25 in. wg DSP) has an NC=32. (A more accurate selection can be done via TOPSS electronic selection program.)
Table 3.
Selection Program Output (Radiated Fan):
Octave Band 2 3 4 5 6 7 NC
Sound Power 66 58 56 52 48 41 31
The predicted NC level for design cooling is NC-30 and for design heating is NC-31. If the catalog path attenuation assumptions are acceptable, this unit meets all of the design requirements and the selection process is complete.
Computer Selection
The advent of personal computers has served to automate many processes that were previously repetitive and time-consuming. One of those tasks is the proper scheduling, sizing, and selection of VAV terminal units. Trane has developed a computer program to perform these tasks. The software is called the Trane Official Product Selection System (TOPSS).
TheTOPSS program will take the input specifications and output the properly sized VariTrane VAV terminal unit along with the specific performance for that size unit.
The program has several required fields, denoted by red shading in theTOPSS screen, and many other optional fields to meet the criteria you have. Required values include maximum and minimum airflows, control type, and model. If selecting models with reheat, you will be required to enter information to make that selection also. The user is given the option to look at all the information for one selection on one screen or as a schedule with the other VAV units on the job.
The user can select single-duct, dual-duct, and fan-powered VAV boxes with the program, as well as most other Trane products, allowing you to select all your Trane equipment with one software program.
The program will also calculate sound power data for the selected terminal unit.The user can enter a maximum individual sound level for each octave band or a maximum NC value.The program will calculate acoustical data subject to default or user supplied sound attenuation data.
Schedule View
The program has many time-saving features such as:
• Copy/Paste from spreadsheets like Microsoft® Excel
• Easily arranged fields to match your schedule
• Time-saving templates to store default settings
The user can also export the Schedule View to Excel to modify and put into a CAD drawing as a schedule.
Specific details regarding the program, its operation, and how to obtain a copy of it are available from your local Trane sales office.
21
Selection Procedure
Selection Example—Series With Hot Water Heat and ECM
Air Valve Selection
Required Information:
Design cooling airflow: 1000 cfm
Minimum ventilation airflow: 200 cfm
Maximum unit APD: 0.40 in. wg
A 10" air valve is selected.
Check–is minimum airflow above 300 FPM?
Answer–Yes. Minimum cfm allowable = 165 cfm. (See
General Data—Valve/Controller Guidelines pp FPS 8).
The 03SQ fan will be used in this instance. By interpolating, you can choose a 10" air valve with wide-open air pressure drop of 0.32 in. wg.
Heating Coil Selection
Required Information:
Zone design heat loss: 30000 Btu
Design heating airflow: 1000 cfm
Winter room design temp.: 68ºF
Coil entering water temp.: 180ºF
Minimum primary airflow: 200 cfm
Plenum temperature: 70ºF
Primary air temperature: 55ºF
Coil flow rate: 2 gpm
Heat Transfer Equation (Btu) Q = 1.085 x Cfm x Temperature
For the heating zone, the temperature difference is the zone supply air temperature (SAT) minus the winter room design temperature.
30000 Btu = 1.085 x 1000 x (SAT-68°F)
SAT = 96ºF
Because the hot water coil is on the unit discharge of a series fan-powered unit, the unit supply air temperature is equal to the coil LAT. Coil entering air temperature (EAT) is a mix of plenum air and the minimum primary airflow.
1000 cfm x Coil EAT = 200 cfm x 55ºF + (1000 cfm - 200 cfm) x 70ºF
Coil EAT = 67ºF
For the heating coil, the temperature difference is the calculated coil LAT minus the coil EAT
(Plenum Air Temperature).
Coil Q =1.085 x 1000 x (96-70) = 31,465 Btu
On a series unit the hot water coil is located on the discharge, so the total heating airflow, 1000 cfm, passes through the coil.
Coil Performance Table
Selection:
Performance:
Size 03SQ fan, 1-row coil at 2 gpm = 32.23 MBh
1-row Coil at 2 gpm= 0.83 ft WPD
Fan Selection
Required Information.
Fan airflow: 1000 cfm
Downstream static pressure at design airflow: 0.25 in. wg
A size 03SQ fan can operate at up to 1150 cfm (1-row coil) or 1100 (2-row coil) and 0.25" downstream static pressure. Inlet and coil selections should be verified with TOPSS electronic selections.
22 VAV-PRC012-EN
Selection Procedure
VAV-PRC012-EN
If an attenuator is required, use attenuator air pressure drop tables to define additional fan static pressure.
Acoustics
Required Information.
Design inlet static press: 0.75 in. wg
NC criteria (general office space): NC-40
The selection is a VSWF Series Fan-PoweredTerminal Unit, 10" primary, series fan size 03SQ, with a 1-row hot water coil.
Determine the casing radiated noise level because it typically dictates the sound level
(NC) of the space. With a series unit, the air valve and fan operate simultaneously, so the chart for air valve and fan sound data must be consulted.
The results in the below table are for the acoustics value of a size 10" air valve with a size 03SQ fan.
The predicted NC level for design conditions is NC-38.
Octave Band
Sound Power
2
70
3
65
4
63
5
61
6
59
7
59
NC
38
Note: Ensure water coil acoustical impact is considered. For this example, the appurtenance effect
adds one (1) NC to fan-only radiated sound. Because this does not set NC for this selection, it can be overlooked. The addition of an attenuator (see same appurtenance effect tables reduces the NC four (4) points, resulting in a final selection NC = 30 (if required).
Note: Do not overlook the water coil impact on acoustics. A good rule of thumb is that it will add
1 to 2 NC to “fan only” radiated sound for most applications.
Computer Selection
The advent of personal computers has served to automate many processes that were previously repetitive and time-consuming. One of those tasks is the proper scheduling, sizing, and selection of VAV terminal units. Trane has developed a computer program to perform these tasks. The software is called the Trane Official Product Selection System (TOPSS).
TheTOPSS program will take the input specifications and output the properly sized VariTrane VAV terminal unit along with the specific performance for that size unit.
The program has several required fields, denoted by red shading in theTOPSS screen, and many other optional fields to meet the criteria you have. Required values include maximum and minimum airflows, control type, and model. If selecting models with reheat, you will be required to enter information to make that selection also. The user is given the option to look at all the information for one selection on one screen or as a schedule with the other VAV units on the job.
User can select single-duct, dual-duct, and fan-powered VAV boxes with the program, as well as most otherTrane products, allowing selection of allTrane equipment with one software program.
The program will also calculate sound power data for the selected terminal unit.The user can enter a maximum individual sound level for each octave band or a maximum NC value.The program will calculate acoustical data subject to default or user supplied sound attenuation data.
Schedule View
The program has many time-saving features such as:
• Copy/Paste from spreadsheets like Microsoft® Excel
• Easily arranged fields to match your schedule
• Time-saving templates to store default settings
User can also export Schedule View to Excel to modify and put into a CAD drawing as a schedule.
Specific details regarding program, its operation, and how to obtain a copy of it are available from your local Trane sales office.
23
Performance Data
Parallel Fan-Powered Terminal Units
Table 4.
Primary airflow control factory setting-I-P
Control Type
Direct Digital
Control/ UCM
Air Valve
Size (in.)
10
12
14
16
5
6
8
Maximum
Valve Cfm
350
500
900
1400
2000
3000
4000
Maximum
Controller Cfm
40-350
60-500
105-900
165-1400
240-2000
320-3000
420-4000
Pneumatic with
Volume
Regulator
10
12
14
16
5
6
8
350
500
900
1400
2000
2885
3785
63-350
73-500
134-900
215-1400
300-2000
408-2887
536-3789
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Minimum
Controller Cfm
0, 40-350
0, 60-500
0, 105-900
0, 165-1400
0, 240-2000
0, 320-3000
0, 420-4000
0, 63-350
0, 73-500
0, 134-900
0, 215-1400
0, 300-2000
0, 408-2887
0, 536-3789
Constant Volume
Cfm
40-350
60-500
105-900
165-1400
240-2000
320-3000
420-4000
63-350
73-500
134-900
215-1400
300-2000
408-2887
536-3789
Table 5.
Primary airflow control factory settings – SI
Control Type
Air Valve
Size (in.)
Maximum
Valve L/s
Maximum
Controller L/s
Direct Digital
Control/ UCM
10
12
14
16
5
6
8
165
236
425
661
944
1416
1888
19-165
28-236
50-425
77-661
111-944
151-1416
198-1888
Pneumatic with
Volume
Regulator
5
6
8
10
12
14
16
165
236
425
661
944
1362
1787
30-165
35-236
63-425
102-661
141-944
193-1363
253-1788
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Minimum
Controller L/s
0, 19-350
0, 28-236
0, 50-425
0, 77-661
0, 111-944
0, 151-1416
0, 198-1888
0, 30-165
0, 35-236
0, 63-425
0, 102-661
0, 141-944
0, 193-1363
0, 253-1788
Constant
Volume L/s
19-350
28-236
50-425
77-661
111-944
151-1416
198-1888
30-165
35-236
63-425
102-661
141-944
193-1363
253-1788
Table 6.
Unit air pressure drop – in. wg (I-P)
Fan/Inlet Size Airflow Cfm Cooling Only Fan/Inlet Size Airflow Cfm Cooling Only
02SQ-05
02SQ-06
60
200
350
500
0.01
0.05
0.17
0.35
05SQ-10
Note:
Unit pressure drops do not include hot water coil or attenuator pressure drops.
02SQ-08
40
150
250
350
105
350
600
900
0.01
0.03
0.08
0.17
0.01
0.03
0.09
0.21
04SQ-14
05SQ-12
320
1200
2100
3000
165
550
950
1400
240
750
1350
2000
0.01
0.01
0.01
0.01
0.01
0.01
0.02
0.05
0.01
0.01
0.01
0.01
24 VAV-PRC012-EN
Performance Data
VAV-PRC012-EN
Table 6.
Unit air pressure drop – in. wg (I-P) (continued)
Fan/Inlet Size Airflow Cfm Cooling Only
02SQ-10
03SQ-06
165
550
950
1400
60
200
350
500
0.01
0.01
0.01
0.01
0.01
0.06
0.19
0.40
03SQ-08
03SQ-10
03SQ-12
04SQ-08
04SQ-10
04SQ-12
105
350
600
900
165
550
950
1400
240
750
1350
2000
105
350
600
900
165
550
950
1400
240
750
1350
2000
0.01
0.03
0.08
0.20
0.01
0.01
0.02
0.05
0.01
0.01
0.01
0.01
0.01
0.03
0.08
0.20
0.01
0.01
0.02
0.05
0.01
0.01
0.01
0.01
Fan/Inlet Size Airflow Cfm Cooling Only
05SQ-14
06SQ-10
320
1200
2100
3000
165
550
950
1400
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
06SQ-12
06SQ-14
06SQ-16
07SQ-10
07SQ-12
07SQ-14
07SQ-16
240
750
1350
2000
320
1200
2100
3000
420
1600
2800
4000
165
550
950
1400
240
750
1350
2000
320
1200
2100
3000
420
1600
2800
4000
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
Note:
Unit pressure drops do not include hot water coil or attenuator pressure drops.
Table 7.
Coil air pressure drop – in. wg (I-P)
Fan Size
02SQ
Airflow Cfm
100
200
300
400
500
1-Row HW (in. wg)
0.00
0.01
0.01
0.02
0.02
03SQ
04SQ
05SQ
06SQ
07SQ
250
500
750
1000
1250
1400
600
900
1200
1500
1800
2000
Note:
HW Coil Only pressure drops do not include unit pressure drop.
0.01
0.02
0.04
0.07
0.10
0.12
0.02
0.04
0.06
0.09
0.12
0.15
2-Row HW (in. wg)
0.00
0.01
0.02
0.03
0.05
0.04
0.07
0.11
0.16
0.22
0.27
0.02
0.04
0.08
0.13
0.19
0.23
25
Performance Data
26
Table 8.
Attenuator air pressure drop (I-P)
Fan Size Plenum Cfm Attenuator
02SQ
03SQ
50
250
500
750
1000
1200
50
200
350
500
650
750
04SQ
50
300
600
900
1200
1450
Note:
Plenum cfm = (Fan cfm)
0.00
0.00
0.00
0.00
0.01
0.06
0.00
0.00
0.01
0.02
0.04
0.06
0.00
0.01
0.02
0.03
0.05
0.06
Table 9.
Attenuator air pressure drop (SI)
Fan Size
02SQ
03SQ
04SQ
24
142
283
425
566
684
Note:
Plenum cfm = (Fan cfm)
24
118
236
354
472
566
24
94
165
236
307
354
Plenum L/s Attenuator
0
0
2
0
0
14
0
0
2
5
10
14
5
8
0
3
11
14
Table 10. Coil air pressure drop – Pa (SI)
Fan Size
02SQ
03SQ
04SQ
05SQ
Airflow L/s
118
236
354
472
590
661
200
300
400
500
600
1-Row HW (Pa)
2
5
10
17
25
31
0
1
2
4
6
Fan Size
05SQ
06SQ
07SQ
Plenum Cfm
50
300
600
900
1200
1550
50
500
900
1300
1650
1900
50
500
1000
1500
2000
2500
Attenuator
0.00
0.01
0.03
0.06
0.10
0.14
0.00
0.00
0.02
0.06
0.13
0.24
0.00
0.01
0.04
0.08
0.15
0.25
Fan Size
05SQ
06SQ
07SQ
Plenum L/s Attenuator
24
236
425
613
779
897
24
142
283
425
566
731
24
236
472
708
944
1180
0
2
7
15
26
35
0
1
5
15
32
61
0
2
9
21
38
62
2-Row HW (Pa)
4
11
21
33
47
57
1
3
5
8
12
VAV-PRC012-EN
Performance Data
Table 10. Coil air pressure drop – Pa (SI)
06SQ
07SQ
900
1200
1500
1800
2150
2500
Note:
HW Coil Only pressure drops do not include unit pressure drop.
Table 11. Unit air pressure drop-Pa (SI)
Fan/Inlet Size
02SQ-05
02SQ-06
02SQ-08
02SQ-10
03SQ-06
03SQ-08
03SQ-10
03SQ-12
04SQ-08
04SQ-10
04SQ-12
Airflow L/s
50
165
283
425
78
260
448
661
113
354
637
944
50
165
283
425
78
260
448
661
113
354
637
944
19
71
118
165
28
94
165
236
50
165
283
425
78
260
448
661
28
94
165
236
Cooling Only
2
2
6
13
2
2
2
2
2
6
21
49
2
6
21
49
2
2
6
13
2
2
2
2
2
13
41
86
2
8
23
51
2
2
2
3
2
7
20
41
2
15
48
99
5
9
15
22
30
36
Fan/Inlet Size Airflow L/s
04SQ-14
05SQ-10
05SQ-12
05SQ-14
06SQ-10
06SQ-12
06SQ-14
06SQ-16
07SQ-10
07SQ-12
07SQ-14
07SQ-16
113
354
637
944
151
566
991
1416
198
755
1321
1888
78
260
448
661
113
354
637
944
151
566
991
1416
198
755
1321
1888
151
566
991
1416
78
260
448
661
113
354
637
944
151
566
991
1416
78
260
448
661
Note:
Unit pressure drops do not include hot water coil or attenuator pressure drops.
10
18
28
41
56
67
Cooling Only
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
6
13
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
VAV-PRC012-EN 27
Performance Data
Pa In. wg
150 0.60
Parallel 02SQ—PSC
125 0.50
100 0.40
75 0.30
50
0.20
VPCF and VPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Note:
When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa
199
In. wg
0.80
174 0.70
150
0.60
125 0.50
100 0.40
75
0.30
50
0.20
25 0.10
200
94
25 0.10
100
47
200
94
300
142
400
189
Airflow
500
236
600
283
700
330
Cfm
L/s
Pa In. wg
199 0.80
174
0.70
150 0.60
125 0.50
100
0.40
75 0.30
50
0.20
25 0.10
200
94
300
142
400
189
500
236
Parallel Fan Size 03SQ—PSC
600
283
700
330
Airflow
800
378
900
425
1000
472
1100
519
1200
566
1300
Cfm
614
L/s
Parallel 04SQ—PSC
400
189
600
283
800
378
Airflow
1000
472
1200
566
1400
661
1600
Cfm
755
L/s
28 VAV-PRC012-EN
Performance Data
Pa In. wg
199
0.80
174 0.70
150 0.60
125
0.50
100
0.40
75 0.30
50
0.20
25 0.10
300
142
500
236
700
330
Parallel 05SQ—PSC
900
425
1100
519
Airflow
1300
614
1500
708
1700
802
Cfm
L/s
VPCF and VPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Note:
When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa In. wg
199 0.80
174
0.70
150 0.60
125 0.50
100 0.40
75 0.30
50 0.20
25 0.10
400
189
600
283
Parallel 06SQ—PSC
800
378
1000
472
1200
566
1400
661
Airflow
1600
755
1800
850
2000
944
2200
Cfm
1038 L/s
Pa In. wg
199 0.80
174
0.70
150 0.60
125 0.50
100 0.40
75
0.30
50 0.20
25 0.10
500
236
Parallel 07SQ—PSC
700
330
900
425
1100
519
1300
614
1500
708
Airflow
1700
802
1900
897
2100
991
2300
1086
Cfm
L/s
VAV-PRC012-EN 29
Performance Data
Pa In. wg
125 0.50
100 0.40
75
0.30
VPxF 03SQ—ECM
50
0.20
25 0.10
100
47
200
94
300
142
400
189
500
236
600
283
Airflow
700
330
800
378
900
425
1000
472
1100
519
Cfm
L/s
Pa In. wg
125 0.50
VPCF and VPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
100 0.40
75 0.30
50
0.20
25 0.10
200
94
400
189
Pa In. wg
125 0.50
VPxF 04SQ—ECM
600
283
800
378
Airflow
1000
472
1200
566
1400
661
1600
Cfm
755
L/s
VPxF 05SQ—ECM
30
100 0.40
75
0.30
50
0.20
25 0.10
200
94
400
189
600
283
800
378
1000
472
1200
566
Airflow
1400
661
1600
755
1800
850
2000
944
Cfm
L/s
VAV-PRC012-EN
Performance Data
Pa In. wg
125 0.50
VPxF 06SQ—ECM
VPCF and VPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
100 0.40
75
0.30
50 0.20
25 0.10
400 600
283
800
378
1000
472
1200
566
1400
661
Airflow
1600
755
1800
850
2000
944
2200
1038
Cfm
L/s
Table 12. Heating capacity (MBh) - fan size 02SQ (I-P)
Rows Gpm
Water
Pressure
Drop (ft)
1-Row
Capacity
MBH
2-Row
Capacity
MBH
1.0
2.0
3.0
4.0
5.0
0.5
1.0
2.0
3.0
4.0
5.0
0.22
0.76
2.65
5.54
9.39
14.17
1.30
4.41
9.08
15.18
22.66
100
-
9.20
9.79
10.01
10.12
10.19
9.97
10.29
10.40
10.45
10.48
150
-
11.49
12.50
12.87
13.07
13.19
13.83
14.58
14.83
14.95
15.03
200
-
13.14
14.52
15.04
15.32
15.49
17.07
18.39
18.83
19.05
19.18
250
-
14.45
16.17
16.84
17.19
17.41
19.81
21.78
22.46
22.80
23.00
Airflow (Cfm)
300
-
15.56
17.60
18.39
18.82
19.09
22.13
24.82
25.76
26.23
26.52
350
-
16.52
18.87
19.79
20.29
20.60
24.13
27.56
28.77
29.40
29.78
400
-
17.38
20.02
21.07
21.64
22.00
25.85
30.03
31.54
32.32
32.80
Notes:
1. Fouling Factor = 0.0005 °F ft² h/Btu.
2. Capacity based on 70°F entering air temperature and 180°F entering water temperature.
450
-
18.16
21.09
22.26
22.90
23.30
27.35
32.27
34.09
35.04
35.62
500
-
18.93
22.08
23.38
24.09
24.54
28.67
34.31
36.45
37.56
38.25
550
-
19.64
23.02
24.44
25.22
25.71
29.83
36.18
38.63
39.92
40.72
600
-
20.30
23.90
25.44
26.29
26.83
30.86
37.90
40.67
42.13
43.03
VAV-PRC012-EN 31
Performance Data
Table 13. Heating capacity (MBh) - fan sizes 03SQ–05SQ (I-P)
1-Row
Capacity
MBH
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
2-Row
Capacity
MBH
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Rows Gpm
Water
Pressure
Drop (ft)
0.35
1.28
2.74
4.72
7.20
10.18
13.64
17.59
22.03
26.94
0.28
1.02
2.22
3.85
5.92
8.41
11.32
14.65
18.40
22.57
Airflow (Cfm)
150 300 450 600 750 900 1050 1200 1350 1500 1650
-
15.08
15.36
15.50
15.59
15.64
15.68
15.71
15.74
15.76
-
13.14
13.62
13.88
14.04
14.14
14.22
14.28
14.33
14.37
-
25.87
27.00
27.57
27.92
28.15
28.31
28.44
28.54
28.62
-
18.63
19.69
20.27
20.64
20.89
21.08
21.22
21.33
21.42
-
33.70
35.94
37.11
37.83
38.31
38.66
38.93
39.13
39.30
-
22.21
23.78
24.65
25.21
25.59
25.88
26.10
26.28
26.42
-
39.58
42.99
44.82
45.97
46.74
47.31
47.74
48.08
48.35
-
25.01
27.05
28.20
28.95
29.46
29.85
30.15
30.38
30.57
-
47.77
53.40
56.57
58.59
59.99
61.02
61.81
62.44
62.95
-
29.41
32.34
34.03
35.14
35.92
36.50
36.95
37.31
37.60
-
44.13
48.69
51.20
52.78
53.87
54.67
55.28
55.76
56.15
-
27.36
29.86
31.28
32.21
32.85
33.34
33.71
34.01
34.25
-
53.20
60.74
65.13
67.99
70.00
71.49
72.64
73.55
74.30
-
33.00
36.63
38.84
40.31
41.35
42.13
42.73
43.22
43.62
-
50.73
57.36
61.15
63.60
65.32
66.58
67.55
68.32
68.95
-
31.30
34.58
36.54
37.82
38.73
39.41
39.94
40.36
40.71
-
57.08
66.21
71.68
75.30
77.87
79.80
81.29
82.48
83.45
-
35.94
40.31
42.99
44.80
46.10
47.08
47.85
48.46
48.97
-
55.29
63.66
68.60
71.85
74.15
75.86
77.19
78.24
79.10
-
34.54
38.52
40.98
42.62
43.80
44.67
45.36
45.91
46.36
-
58.63
68.46
74.42
78.39
81.23
83.36
85.01
86.33
87.42
-
37.23
41.99
44.86
46.85
48.28
49.36
50.21
50.89
51.45
Table 14. Heating capacity (MBh) - fan sizes 06SQ & 07SQ (I-P)
Rows Gpm
Water
Pressure
Drop (ft)
1-Row
Capacity
MBH
2-Row
Capacity
MBH
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0.5
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0.11
0.36
1.24
2.57
4.32
6.49
9.04
11.99
0.68
2.24
4.57
7.59
11.29
15.64
20.61
Airflow (Cfm)
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900
-
-
32.17
35.12
36.78
37.86
38.61
39.17
-
51.03
56.65
59.73
61.67
63.00
63.97
-
-
33.60
36.76
38.60
39.79
40.63
41.25
-
53.38
59.74
63.27
65.51
67.05
68.18
-
-
34.93
38.31
40.32
41.63
42.55
43.23
-
55.46
62.53
66.50
69.04
70.79
72.07
-
-
36.17
39.77
41.95
43.38
44.38
45.13
-
57.32
65.06
69.46
72.28
74.24
75.69
-
-
37.34
41.16
43.51
45.05
46.14
46.95
-
58.98
67.37
72.18
75.29
77.45
79.05
-
-
38.43
42.50
45.01
46.66
47.83
48.70
-
60.47
69.48
74.69
78.08
80.44
82.19
-
-
39.47
43.81
46.44
48.21
49.46
50.40
-
61.83
71.42
77.02
80.67
83.24
85.14
-
-
40.45
45.07
47.82
49.70
51.04
52.04
-
63.07
73.20
79.18
83.09
85.86
87.90
-
-
41.38
46.27
49.14
51.14
52.56
53.62
-
64.20
74.86
81.19
85.36
88.31
90.51
-
-
42.27
47.42
50.42
52.53
54.04
55.16
-
65.24
76.40
83.08
87.50
90.63
92.96
-
-
43.12
48.53
51.68
53.88
55.47
56.66
-
66.20
77.83
84.84
89.50
92.81
95.28
Water Coil Performance Notes (I-P)
1.
Fouling Factor = 0.0005.
2. The off-coil temperature of the hot water coil on parallel fan-powered units must not exceed
140°F when mounted on plenum inlet.
3. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+
--------------------------------------
WTD
=
EWT LWT
=
------------------------
32 VAV-PRC012-EN
VAV-PRC012-EN
Performance Data
4. Capacity based on 70°F entering air temperature and 180°F entering water temperature. Refer to correction factors for different entering conditions.
5. For premium coils (.020” wall), water side pressure drop increases 17% and water velocity increases 7% for fixed GPM.
Table 15. Temperature correction factors for water pressure drop (ft)
Average Water Temperature
Correction Factor
200
0.970
190
0.985
180
1.000
170
1.020
160
1.030
150
1.050
140
1.080
130
1.100
120
1.130
110
1.150
Table 16. Temperature correction factors for coil capacity (MBH)
Entering Water Minus Entering Air
Correction Factor
40
0.355
50
0.446
60
0.537
70
0.629
80
0.722
90
0.814
100
0.907
110
1.000
120
1.093
130
1.187
Table 17. Heating capacity (kW) - fan size 02SQ (SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.03
0.06
0.13
0.19
0.25
0.32
0.06
0.13
0.19
0.25
0.32
Water
Pressure
Drop
(kPa)
0.66
2.26
7.91
16.57
28.08
42.34
3.89
13.19
27.13
45.38
67.73
47
-
2.69
2.87
2.93
2.97
2.99
2.92
3.02
3.05
3.06
3.07
71
-
3.37
3.66
3.77
3.83
3.87
4.05
4.27
4.35
4.38
4.40
Airflow (L/s)
94 118 142 165 189 212 236 260
-
3.85
4.26
4.41
4.49
4.54
5.00
5.39
5.52
5.58
5.62
-
4.24
4.74
4.93
5.04
5.10
5.80
6.38
6.58
6.68
6.74
-
4.56
5.16
5.39
5.52
5.59
6.49
7.27
7.55
7.69
7.77
-
4.84
5.53
5.80
5.95
6.04
7.07
8.08
8.43
8.62
8.73
-
5.09
5.87
6.18
6.34
6.45
7.58
8.80
9.24
9.47
9.61
-
5.32
6.18
6.52
6.71
6.83
8.02
9.46
9.99
10.27
10.44
-
5.55
6.47
6.85
7.06
7.19
8.40
10.06
10.68
11.01
11.21
-
5.76
6.75
7.16
7.39
7.53
8.74
10.60
11.32
11.70
11.93
283
-
5.76
6.75
7.16
7.39
7.53
8.74
10.60
11.32
11.70
11.93
Table 18. Heating capacity (kW) - fan sizes 03SQ–05SQ (SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
Water
Pressure
Drop (kPa)
1.06
3.83
8.20
14.11
21.52
30.42
40.78
52.59
65.84
80.52
0.82
3.06
6.63
11.51
17.68
25.13
33.83
43.79
55.00
67.45
Airflow (L/s)
71 142 212 283 354 425 495 566 637 708 779
-
7.58
7.91
8.08
8.18
8.25
8.30
8.33
8.36
8.39
-
5.46
5.77
5.94
6.05
6.12
6.18
6.22
6.25
6.28
-
4.42
4.50
4.54
4.57
4.58
4.60
4.61
4.61
4.62
-
3.85
3.99
4.07
4.11
4.15
4.17
4.19
4.20
4.21
-
16.20
18.66
20.11
21.06
21.73
22.23
22.62
22.93
23.18
-
10.12
11.29
12.01
12.49
12.84
13.09
13.29
13.46
13.59
-
15.59
17.80
19.09
19.92
20.51
20.95
21.29
21.56
21.77
-
9.67
10.74
11.38
11.81
12.12
12.35
12.52
12.67
12.78
-
14.87
16.81
17.92
18.64
19.14
19.51
19.80
20.02
20.21
-
9.17
10.14
10.71
11.08
11.35
11.55
11.71
11.83
11.93
-
14.00
15.65
16.58
17.17
17.58
17.88
18.12
18.30
18.45
-
8.62
9.48
9.97
10.30
10.53
10.70
10.83
10.93
11.02
-
12.93
14.27
15.01
15.47
15.79
16.02
16.20
16.34
16.45
-
8.02
8.75
9.17
9.44
9.63
9.77
9.88
9.97
10.04
-
11.60
12.60
13.14
13.47
13.70
13.87
13.99
14.09
14.17
-
7.33
7.93
8.27
8.48
8.64
8.75
8.83
8.90
8.96
-
9.88
10.53
10.88
11.09
11.23
11.33
11.41
11.47
11.52
-
6.51
6.97
7.22
7.39
7.50
7.58
7.65
7.70
7.74
-
16.73
19.40
21.01
22.07
22.82
23.39
23.82
24.17
24.46
-
10.53
11.81
12.60
13.13
13.51
13.80
14.02
14.20
14.35
-
16.73
19.40
21.01
22.07
22.82
23.39
23.82
24.17
24.46
-
10.53
11.81
12.60
13.13
13.51
13.80
14.02
14.20
14.35
33
Performance Data
Table 19. Heating capacity (kW) - fan sizes 06SQ & 07SQ (SI)
Rows L/s
1-Row
Capacity kW
0.03
0.06
0.13
0.19
0.25
0.32
0.38
0.44
2-Row
Capacity kW
0.06
0.13
0.19
0.25
0.32
0.38
0.44
Water
Pressure
Drop
(kPa)
0.33
1.09
3.71
7.68
12.92
19.39
27.04
35.84
2.02
6.70
13.65
22.70
33.76
46.74
61.61
Airflow (L/s)
425 472 519 566 613 661 708 755 802 849 897
-
-
9.43
10.29
10.78
11.10
11.32
11.48
-
-
9.85
10.77
11.31
11.66
11.91
12.09
-
-
10.24
11.23
11.82
12.20
12.47
12.67
-
-
10.60
11.66
12.30
12.71
13.01
13.23
-
-
10.94
12.06
12.75
13.20
13.52
13.76
-
-
11.26
12.46
13.19
13.67
14.02
14.27
-
-
11.57
12.84
13.61
14.13
14.50
14.77
-
-
11.86
13.21
14.01
14.57
14.96
15.25
-
-
12.13
13.56
14.40
14.99
15.40
15.72
-
-
12.39
13.90
14.78
15.40
15.84
16.17
-
-
12.39
13.90
14.78
15.40
15.84
16.17
-
14.96
16.60
17.51
18.07
18.46
18.75
-
15.64
17.51
18.54
19.20
19.65
19.98
-
16.25
18.33
19.49
20.23
20.75
21.12
-
16.80
19.07
20.36
21.18
21.76
22.18
-
17.28
19.74
21.15
22.06
22.70
23.17
-
17.72
20.36
21.89
22.88
23.58
24.09
-
18.12
20.93
22.57
23.64
24.39
24.95
-
18.48
21.45
23.20
24.35
25.16
25.76
-
18.82
21.94
23.80
25.02
25.88
26.52
-
19.12
22.39
24.35
25.64
26.56
27.24
-
19.12
22.39
24.35
25.64
26.56
27.24
Water Coil Performance Notes (SI)
1.
Fouling Factor = 0.0005.
2. The off-coil temperature of the hot water coil on parallel fan-powered units must not exceed
60°C when mounted on plenum inlet.
3. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+ -----------------------------
WTD=EWT-LWT=kW/(4.19) L/s
4. Capacity based on 21°C entering air temperature and 82°C entering water temperature. Refer to correction factors for different entering conditions.
5. For premium coils (.020” wall), water side pressure drop increases 17% and water velocity increases 7% for fixed GPM.
Table 20. Temperature correction factors for water pressure drop (kPa)
Average Water Temperature
Correction Factor
93
0.970
88
0.985
82
1.000
77
1.020
71
1.030
66
1.050
60
1.080
54
1.100
49
1.130
43
1.150
Table 21. Temperature correction factors for coil capacity (kW)
Entering Water Minus Entering Air
Correction Factor
22
0.355
27
0.446
33
0.537
38
0.629
44
0.722
50
0.814
55
0.907
61
1.000
67
1.093
72
1.187
34 VAV-PRC012-EN
Performance Data
Series Fan-Powered Terminal Units
Table 22. Primary airflow control factory settings – I-P
Control Type
Air Valve Size
(in.)
Maximum
Valve Cfm
Maximum
Controller Cfm
Direct Digital
Control/UCM
4
5
6
8
10
12
14
16
4
5
6
8
225
350
500
900
1400
2000
3000
4000
225
350
500
900
25-225
40-350
60-500
105-900
165-1400
240-2000
320-3000
420-4000
38-225
63-350
73-500
134-900
Pneumatic with
Volume Regulator
10
12
14
16
1400
2000
2885
3785
215-1400
300-2000
408-2887
536-3789
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Minimum
Controller Cfm
0, 25-225
0, 40-350
0, 60-500
0, 105-900
0, 165-1400
0, 240-2000
0, 320-3000
0, 420-4000
0, 38-225
0, 63-350
0, 73-500
0, 134-900
0, 215-1400
0, 300-2000
0, 408-2887
0, 536-3789
Table 23. Primary airflow control factory settings – SI
Control Type
Air Valve Size
(in.)
Maximum
Valve L/s
Maximum
Controller L/s
Direct Digital
Control/UCM
Pneumatic with
Volume
Regulator
10
12
14
16
6
8
4
5
10
12
14
16
6
8
4
5
106
165
236
425
661
944
1416
1888
106
165
236
425
661
944
1362
1787
12-106
19-165
28-236
50-425
77-661
111-944
151-1416
198-1888
18-106
30-165
35-236
63-425
102-661
141-944
193-1363
253-1788
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Minimum
Controller L/s
0, 12-106
0, 19-165
0, 28-236
0, 50-425
0, 77-661
0, 111-944
0, 151-1416
0, 198-1888
0, 18-106
0, 30-165
0, 35-236
0, 63-425
0, 102-661
0, 141-944
0, 193-1363
0, 253-1788
Constant
Volume L/s
12-106
19-165
28-236
50-425
77-661
111-944
151-1416
198-1888
18-106
30-165
35-236
63-425
102-661
141-944
193-1363
253-1788
Constant
Volume Cfm
25-225
40-350
60-500
105-900
165-1400
240-2000
320-3000
420-4000
38-225
63-350
73-500
134-900
215-1400
300-2000
408-2887
536-3789
VAV-PRC012-EN 35
Performance Data
Table 24. Unit air pressure drop – in. wg (I-P)
Fan/Inlet Size
2SQ-04
2SQ-05
Airflow Cfm
200
225
200
250
300
350
Unit
0.03
0.03
0.03
0.04
0.06
0.09
2SQ-06
2SQ-08
2SQ-10
03SQ-06
03SQ-08
03SQ-10
03SQ-12
04SQ-06
200
300
400
500
0.03
0.11
0.24
0.44
0.01
0.07
0.16
0.32
0.16
0.29
0.35
0.48
0.10
0.15
0.34
0.45
0.05
0.16
0.31
0.49
0.01
0.05
0.10
0.16
0.01
0.02
0.06
0.11
250
550
850
1200
250
550
850
1200
330
400
450
500
250
300
400
500
250
500
700
900
200
400
550
700
200
400
550
700
0.03
0.06
0.12
0.19
Note:
Unit pressure drops do not include hot water coil or attenuator pressure drops.
Fan/Inlet Size
04SQ-12
04SQ-14
05SQ-10
05SQ-12
05SQ-14
6SQ-10
6SQ-12
6SQ-14
6SQ-16
7SQ-10
Airflow Cfm
330
750
1150
1550
330
750
1150
1550
700
1350
2000
2600
850
1000
1200
1400
700
1150
1600
2000
700
1350
2000
2600
400
900
1400
1900
700
950
1200
1400
400
750
1100
1400
400
900
1400
1900
0.01
0.04
0.19
0.41
0.01
0.05
0.12
0.22
0.01
0.01
0.12
0.27
0.01
0.04
0.19
0.41
0.01
0.09
0.26
0.53
0.01
0.03
0.12
0.22
0.01
0.08
0.22
0.39
0.01
0.09
0.28
0.58
Unit
0.02
0.11
0.28
0.51
0.02
0.11
0.26
0.48
36 VAV-PRC012-EN
Performance Data
Table 24. Unit air pressure drop – in. wg (I-P) (continued)
Fan/Inlet Size
04SQ-08
04SQ-10
Airflow Cfm
330
500
700
900
330
700
1050
1400
Unit
0.04
0.12
0.25
0.44
0.02
0.12
0.29
0.54
Note:
Unit pressure drops do not include hot water coil or attenuator pressure drops.
Fan/Inlet Size
7SQ-12
7SQ-14
7SQ-16
Airflow Cfm
850
1200
1600
2000
850
1550
2250
3000
850
1550
2250
3000
Table 25. Coil air pressure drop – in. wg (I-P)
Fan
Size
02SQ
03SQ
04SQ
Airflow
Cfm
200
300
400
500
600
250
500
750
1000
1250
1500
1-Row HW
(in. wg)
0.01
0.02
0.04
0.06
0.08
0.01
0.02
0.05
0.08
0.12
0.16
2-Row HW
(in. wg)
0.03
0.05
0.08
0.11
0.15
0.02
0.05
0.10
0.15
0.22
0.30
Fan Size Airflow Cfm
05SQ
400
700
1000
1250
1500
1750
1-Row HW
(in. wg)
0.01
0.04
0.07
0.10
0.14
0.19
06SQ
07SQ
600
1000
1500
2000
2500
3000
0.02
0.04
0.08
0.13
0.19
0.27
Note:
HW Coil Only pressure drops do not include unit pressure drop.
2-Row HW
(in. wg)
0.03
0.08
0.13
0.19
0.26
0.34
0.04
0.08
0.15
0.23
0.34
0.47
Table 26. Attenuator air pressure drop (I-P)
Fan Size Plenum Cfm Attenuator
02SQ
03SQ
50
150
350
550
750
950
50
250
500
750
1000
1200
0.00
0.00
0.02
0.05
0.10
0.16
0.00
0.00
0.02
0.06
0.13
0.21
04SQ
50
300
600
900
1200
1500
0.00
0.02
0.07
0.14
0.24
0.35
Note:
Plenum cfm = (Fan cfm) – (Min. valve cfm)
Fan Size Plenum Cfm
05SQ
06SQ
07SQ
50
300
650
1000
1300
1650
50
500
900
1300
1700
2100
50
800
1200
1600
2000
2400
Attenuator
0.00
0.01
0.05
0.14
0.28
0.52
0.00
0.00
0.02
0.07
0.17
0.36
0.00
0.01
0.05
0.14
0.30
0.58
Unit
0.01
0.02
0.12
0.27
0.01
0.07
0.27
0.59
0.01
0.07
0.27
0.59
VAV-PRC012-EN 37
Performance Data
Table 27. Attenuator air pressure drop (SI)
Fan Size Plenum L/s Attenuator
02SQ
03SQ
04SQ
24
118
236
354
472
566
24
71
165
260
354
448
24
142
283
425
566
708
Note:
Plenum cfm = (Fan cfm) – (Min. valve cfm)
0
1
5
15
32
52
0
1
4
12
24
40
0
5
18
36
59
88
Fan Size
05SQ
06SQ
07SQ
Plenum L/s Attenuator
24
236
425
613
802
991
24
142
307
472
613
779
24
378
566
755
944
1133
0
1
4
16
42
90
0
2
12
36
70
129
0
3
12
34
75
144
Table 28. Coil air pressure drop – Pa (SI)
Fan
Size
02SQ
03SQ
04SQ
Airflow
L/s
250
400
500
600
700
118
236
354
472
590
708
1-Row HW
(Pa)
3
6
10
14
20
2
6
12
19
29
40
2-Row HW
(Pa)
7
12
19
28
38
5
13
24
38
55
75
Fan Size
Airflow L/ s
05SQ
189
330
472
590
708
826
06SQ
07SQ
850
1300
1700
2150
2550
3000
Note:
HW coil only pressure drops do not include unit pressure drop.
1-Row HW
(Pa)
4
9
17
25
35
47
4
9
19
31
47
66
2-Row HW
(Pa)
8
19
33
48
65
85
9
19
36
58
85
117
38 VAV-PRC012-EN
Performance Data
Table 29. Unit air pressure drop-Pa (SI)
Fan/Inlet Size
2SQ-04
2SQ-05
2SQ-06
2SQ-08
2SQ-10
03SQ-06
03SQ-08
03SQ-10
03SQ-12
04SQ-06
04SQ-08
Airflow Cfm
94
189
260
330
94
189
260
330
118
142
189
236
118
236
330
425
94
106
94
118
142
165
94
142
189
236
118
260
401
566
118
260
401
566
156
189
212
236
156
236
330
425
Unit
25
38
85
112
2
12
24
39
2
5
14
39
12
41
76
123
7
9
7
11
16
22
7
16
29
46
8
28
59
110
4
17
40
79
40
73
88
119
10
29
63
109
04SQ-10
156
330
495
661
5
30
73
135
04SQ-12
156
354
543
731
5
28
69
127
Note: Unit pressure drops do not include hot water coil or attenuator pressure drops.
Fan/Inlet Size
04SQ-14
05SQ-10
05SQ-12
05SQ-14
6SQ-10
6SQ-12
6SQ-14
6SQ-16
7SQ-10
7SQ-12
7SQ-14
7SQ-16
Airflow Cfm
330
543
755
944
330
637
944
1227
330
637
944
1227
401
472
566
661
401
566
755
944
401
731
1062
1416
401
731
1062
1416
156
354
543
731
189
354
519
661
189
425
661
897
189
425
661
897
330
448
566
661
VAV-PRC012-EN
Unit
2
3
31
68
2
9
47
101
2
9
47
101
2
12
2
8
31
55
5
27
65
120
1
20
55
98
2
23
71
144
2
21
65
131
55
2
5
31
68
2
18
67
147
2
18
67
147
39
Performance Data
VSCF and VSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Note:
When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
40
Pa In. wg
150
0.60
125
0.50
100
0.40
75
0.30
50
0.20
25
0.10
0
0.00
100
47
200
94
Series 02SQ—PSC
300
142
400
189
Airflow
500
236
600
283
700
330
800
378
Cfm
L/s
Pa In. wg
199 0.80
174 0.70
150 0.60
125 0.50
100
0.40
Series 03SQ—PSC
75
0.30
50
0.20
25 0.10
0
0.00
200
94
300
142
400
189
500
236
600
283
700
330
800
378
Airflow
900
425
1000
472
1100
519
1200
566
1300
614
1400
Cfm
661
L/s
Pa In. wg
199 0.80
174 0.70
150 0.60
125 0.50
100 0.40
75 0.30
50 0.20
Series 04SQ—PSC
25 0.10
0 0.00
300
142
400
189
500
236
600
283
700
330
800
378
900 1000 1100 1200 1300 1400 1500 1600 1700
Cfm
425 472 519 566 614 661 708 755 802
L/s
Airflow
VAV-PRC012-EN
Performance Data
VSCF and VSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Note:
When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
VAV-PRC012-EN
Pa
In. wg
199 0.80
174 0.70
150 0.60
125 0.50
100 0.40
75 0.30
50
0.20
25
0.10
0
0.00
300
142
500
236
700
330
Series 05SQ—PSC
900
425
1100
519
Airflow
1300
614
1500
708
1700
802
1900
897
2100
Cfm
991
L/s
Pa In. wg
199 0.80
Series 06SQ—PSC
174 0.70
150 0.60
125 0.50
100
0.40
75
0.30
50 0.20
25 0.10
0 0.00
400
189
600
283
800
378
1000 1200
472 566
1400
661
1600 1800
755
850
2000 2200
944 1038
2400
1133
2600 2800
1227
1322
Cfm
L/s
Airflow
Pa In. wg
199 0.80
174 0.70
150 0.60
125 0.50
100
0.40
75 0.30
50 0.20
25 0.10
Series 07SQ—PSC
0 0.00
800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400
Cfm
378 472 566 661 755 850 944 1038 1133
1227 1322
1416 1510
1605
L/s
Airflow
41
Performance Data
VSCF and VSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
42
Pa In. wg
125 0.50
100 0.40
75
0.30
50
0.20
25
0.10
VSxF Size 03SQ—ECM
0 0.00
100
47
200
94
300
142
400
189
500
236
600
283
700
330
Airflow
800
378
900
425
1000
472
1100
519
1200
Cfm
566
L/s
Pa In. wg
125
0.50
100 0.40
75 0.30
50
0.20
25
0.10
0 0.00
200
94
400
189
VSxF 04SQ—ECM
600
283
800
378
Airflow
1000
472
1200
566
1400
661
1600
Cfm
755
L/s
Pa In. wg
125
0.50
100 0.40
75 0.30
50
0.20
25 0.10
VSxF 05SQ—ECM
0 0.00
300
142
500
236
700
330
900
425
1100
519
Airflow
1300
614
1500
708
1700
802
1900
897
2100
Cfm
991
L/s
VAV-PRC012-EN
Performance Data
VSCF and VSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa
125
In. wg
0.50
100 0.40
75 0.30
50 0.20
25 0.10
VSxF 06SQ—ECM
0 0.00
600
283
800
378
1,000
472
1,200
566
1,400
661
1,600
755
Airflow
1,800
850
2,000
944
2,200
1038
2,400
1133
2,600
Cfm
1227
L/s
Table 30. Heating capacity (MBh) - fan size 02SQ (I-P)
Rows
1-Row
Capacity
MBH
2-Row
Capacity
MBH
Gpm
1.0
2.0
3.0
4.0
5.0
0.50
1.0
2.0
3.0
4.0
5.0
Water
Pressure
Drop (ft)
0.16
0.53
1.85
3.85
6.51
9.79
1.00
3.42
7.05
11.82
17.68
150
-
9.14
9.94
10.25
10.41
10.51
12.59
13.42
13.71
13.86
13.94
200
-
10.34
11.40
11.80
12.02
12.15
15.23
16.60
17.08
17.33
17.48
250
-
11.34
12.63
13.14
13.41
13.58
17.40
19.34
20.04
20.40
20.62
Table 31. Heating capacity (MBh) - fan sizes 03SQ 04SQ (I-P)
Rows
1-Row
Capacity
MBH
2-Row
Capacity
MBH
Gpm
6.0
7.0
8.0
9.0
10.0
1.0
2.0
3.0
4.0
5.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
Water
Pressure
Drop (ft)
0.27
1.01
2.19
3.81
5.85
8.32
11.20
14.50
18.22
22.35
0.39
1.41
3.01
5.16
7.84
11.06
14.81
19.07
200
-
15.03
15.70
16.06
16.29
16.45
16.56
16.65
16.72
16.78
-
18.93
19.46
19.72
19.88
19.98
20.06
20.12
300
-
18.19
19.23
19.80
20.16
20.41
20.59
20.73
20.84
20.93
-
25.58
26.72
27.30
27.65
27.88
28.05
28.18
400
-
20.63
22.00
22.76
23.24
23.58
23.82
24.01
24.17
24.29
-
30.93
32.79
33.75
34.34
34.74
35.02
35.24
550
-
23.57
25.41
26.44
27.11
27.57
27.91
28.18
28.39
28.56
-
37.20
40.20
41.80
42.79
43.47
43.96
44.34
300
-
12.20
13.73
14.34
14.66
14.87
19.21
21.73
22.66
23.14
23.44
Airflow (Cfm)
350
-
12.97
14.73
15.43
15.81
16.05
20.74
23.84
25.00
25.62
25.99
400
-
13.67
15.66
16.45
16.89
17.17
22.06
25.71
27.12
27.86
28.32
Airflow (Cfm)
700
-
26.00
28.29
29.59
30.43
31.02
31.46
31.80
32.08
32.30
-
41.99
46.12
48.38
49.81
50.79
51.50
52.05
850
-
28.09
30.81
32.38
33.40
34.12
34.66
35.07
35.41
35.68
-
45.78
50.97
53.88
55.73
57.01
57.96
58.68
450
-
14.32
16.52
17.41
17.90
18.21
23.19
27.39
29.03
29.90
30.44
1000
-
29.99
33.08
34.91
36.11
36.96
37.59
38.08
38.48
38.80
-
48.85
55.02
58.54
60.81
62.40
63.57
64.46
500
-
14.93
17.33
18.32
18.87
19.21
24.19
28.90
30.77
31.77
32.40
1150 1300
-
31.71
35.15
37.23
38.60
39.58
40.31
40.88
41.34
41.71
-
51.38
58.45
62.56
65.23
67.10
68.49
69.57
-
33.27
37.05
39.38
40.93
42.03
42.86
43.51
44.03
44.46
-
53.52
61.41
66.05
69.11
71.26
72.87
74.11
550
-
15.51
18.10
19.18
19.78
20.17
25.07
30.27
32.37
33.50
34.21
600
-
16.05
18.82
20.01
20.66
21.08
25.85
31.52
33.84
35.10
35.89
1450 1600
-
34.68
38.83
41.38
43.10
44.34
45.26
45.99
46.57
47.05
-
55.34
63.98
69.14
72.55
74.98
76.79
78.19
-
35.97
40.51
43.26
45.15
46.51
47.54
48.34
48.99
49.52
-
56.92
66.24
71.88
75.63
78.31
80.32
81.88
700
-
17.02
20.18
21.56
22.32
22.81
27.19
33.72
36.46
37.96
38.92
VAV-PRC012-EN 43
Performance Data
Table 32. Heating capacity (MBh) - fan size 05SQ (I-P)
Rows
1-Row
Capacity
MBH
2-Row
Capacity
MBH
Gpm
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
Water
Pressure
Drop (ft)
0.39
1.39
2.96
5.08
7.72
10.90
14.59
18.79
0.29
1.08
2.33
4.03
6.18
8.76
11.79
15.24
350
-
29.95
31.40
32.14
32.58
32.87
33.08
33.24
-
21.67
23.02
23.76
24.23
24.55
24.79
24.97
500
-
37.69
40.36
41.74
42.59
43.16
43.57
43.88
-
25.25
27.14
28.20
28.87
29.34
29.69
29.95
650
-
43.62
47.58
49.69
51.00
51.88
52.53
53.02
-
28.09
30.49
31.85
32.72
33.34
33.79
34.14
800
-
48.30
53.51
56.37
58.16
59.39
60.28
60.96
-
30.49
33.38
35.03
36.10
36.86
37.42
37.85
Airflow (Cfm)
1000 1200 1400 1600 1800 2000
-
53.17
59.95
63.77
66.21
67.90
69.14
70.09
-
33.30
36.75
38.78
40.11
41.05
41.75
42.29
-
56.95
65.16
69.90
72.97
75.11
76.69
77.91
-
35.79
39.71
42.12
43.71
44.83
45.67
46.33
-
59.97
69.45
75.05
78.72
81.30
83.22
84.70
-
37.96
42.39
45.14
46.98
48.29
49.28
50.05
-
62.43
73.07
79.45
83.68
86.69
88.93
90.66
-
39.88
44.89
47.92
50.01
51.50
52.63
53.51
-
64.49
76.15
83.26
88.02
91.42
93.97
95.95
-
41.61
47.17
50.48
52.81
54.50
55.76
56.76
-
66.24
78.82
86.60
91.85
95.63
98.47
100.69
-
43.17
49.26
52.91
55.44
57.30
58.71
59.82
2150
-
44.25
50.73
54.64
57.30
59.30
60.82
62.01
-
67.38
80.59
88.84
94.45
98.49
101.54
103.93
Table 33. Heating capacity (MBh) - fan size 06SQ & 07SQ (I-P)
Rows
1-Row
Capacity
MBH
2-Row
Capacity
MBH
Gpm
1.0
2.0
3.0
4.0
5.0
6.0
0.5
1.0
2.0
3.0
4.0
5.0
6.0
Water
Pressure
Drop (ft)
0.12
0.40
1.37
2.83
4.76
7.13
9.93
0.77
2.58
5.27
8.78
13.07
18.13
700
-
-
31.21
33.81
35.27
36.20
36.85
-
47.79
52.10
54.37
55.77
56.71
900
-
-
34.50
37.76
39.61
40.80
41.64
-
54.01
60.08
63.38
65.44
66.85
Airflow (Cfm)
1100 1300 1500 1700 1900
-
-
37.47
41.19
43.42
44.87
45.90
-
58.79
66.51
70.82
73.55
75.43
-
-
40.06
44.25
46.86
48.57
49.78
-
62.56
71.79
77.06
80.45
82.80
-
-
42.33
47.10
50.00
51.97
53.36
-
65.61
76.21
82.39
86.40
89.22
-
-
44.37
49.74
52.91
55.12
56.70
-
68.13
79.96
86.98
91.60
94.86
-
-
46.21
52.17
55.63
58.07
59.83
-
70.25
83.19
91.00
96.18
99.86
2100
-
-
47.89
54.40
58.24
60.84
62.79
-
72.05
86.00
94.54
100.26
104.34
2300
-
-
49.43
56.49
60.68
63.46
65.59
-
73.60
88.47
97.69
103.91
108.37
2500
-
-
50.85
58.43
62.97
66.00
68.24
-
74.95
90.65
100.51
107.20
112.03
2700
-
-
52.16
60.24
65.14
68.41
70.77
-
76.14
92.61
103.06
110.19
115.36
Water Coil Notes (I-P)
1.
Fouling Factor = 0.0005.
2. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD):
LAT
=
EAT
+
------------------------------------
WTD
=
EWT LWT
=
------------------------
44
3. Capacity based on 70°F entering air temperature and 180°F entering water temperature. Refer to correction factors for different entering conditions.
Table 34. Temperature correction factors for water pressure drop (ft)
Average Water Temperature
Correction Factor
200
0.970
190
0.985
180
1.000
170
1.020
160
1.030
150
1.050
140
1.080
130
1.100
120
1.130
110
1.150
VAV-PRC012-EN
Performance Data
Table 35. Temperature correction factors for coil capacity (MBH)
Entering Water Minus Entering Air
Correction Factor
40
0.355
50
0.446
60
0.537
70
0.629
80
0.722
90
0.814
100
0.907
110
1.000
120
1.093
130
1.187
Table 36. Heating capacity (kW) - fan size 02SQ (SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.03
0.06
0.13
0.19
0.25
0.32
0.06
0.13
0.19
0.25
0.32
Water
Pressure
Drop (kPa)
0.47
1.59
5.52
11.51
19.45
29.27
3.00
10.21
21.07
35.33
52.84
71
-
2.68
2.91
3.00
3.05
3.08
3.69
3.93
4.02
4.06
4.09
94
-
3.03
3.34
3.46
3.52
3.56
4.46
4.86
5.01
5.08
5.12
118
-
3.32
3.70
3.85
3.93
3.98
5.10
5.67
5.87
5.98
6.04
Table 37. Heating capacity (kW) - fan sizes 03SQ 04SQ(SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.57
0.63
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
Water
Pressure
Drop (kPa)
0.81
3.02
6.56
11.39
17.49
24.86
33.49
43.36
54.46
66.80
1.18
4.22
8.99
15.41
23.45
33.07
44.26
57.00
142
-
5.33
5.64
5.80
5.91
5.98
6.03
6.08
6.11
6.13
-
7.50
7.83
8.00
8.10
8.17
8.22
8.26
94
-
4.40
4.60
4.71
4.77
4.82
4.85
4.88
4.90
4.92
-
5.55
5.70
5.78
5.83
5.86
5.88
5.90
189
-
6.04
6.45
6.67
6.81
6.91
6.98
7.04
7.08
7.12
-
9.07
9.61
9.89
10.06
10.18
10.26
10.33
260
-
6.91
7.45
7.75
7.94
8.08
8.18
8.26
8.32
8.37
-
10.90
11.78
12.25
12.54
12.74
12.88
12.99
142
-
3.58
4.02
4.20
4.30
4.36
5.63
6.37
6.64
6.78
6.87
165
-
3.80
4.32
4.52
4.63
4.71
6.08
6.99
7.33
7.51
7.62
Airflow (L/s)
189
-
4.01
4.59
4.82
4.95
5.03
6.46
7.54
7.95
8.16
8.30
212
-
4.20
4.84
5.10
5.25
5.34
6.80
8.03
8.51
8.76
8.92
330
-
7.62
8.29
8.67
8.92
9.09
9.22
9.32
9.40
9.47
-
12.31
13.52
14.18
14.60
14.88
15.09
15.25
Airflow (L/s)
401
-
8.23
9.03
9.49
9.79
10.00
10.16
10.28
10.38
10.46
-
13.42
14.94
15.79
16.33
16.71
16.99
17.20
472
-
8.79
9.70
10.23
10.58
10.83
11.02
11.16
11.28
11.37
-
14.32
16.12
17.16
17.82
18.29
18.63
18.89
755
-
10.16
11.38
12.13
12.63
12.99
13.27
13.48
13.65
13.79
-
16.22
18.75
20.26
21.26
21.97
22.50
22.92
684
-
10.16
11.38
12.13
12.63
12.99
13.27
13.48
13.65
13.79
-
16.22
18.75
20.26
21.26
21.97
22.50
22.92
613
-
9.75
10.86
11.54
11.99
12.32
12.56
12.75
12.90
13.03
-
15.68
18.00
19.36
20.25
20.89
21.36
21.72
543
-
9.29
10.30
10.91
11.31
11.60
11.81
11.98
12.12
12.22
-
15.06
17.13
18.33
19.12
19.67
20.07
20.39
236
-
4.38
5.08
5.37
5.53
5.63
7.09
8.47
9.02
9.31
9.50
260
-
4.55
5.30
5.62
5.80
5.91
7.35
8.87
9.49
9.82
10.03
283
-
4.70
5.52
5.86
6.06
6.18
7.58
9.24
9.92
10.29
10.52
330
-
4.70
5.52
5.86
6.06
6.18
7.58
9.24
9.92
10.29
10.52
VAV-PRC012-EN 45
Performance Data
Table 38. Heating capacity (kW) - fan size 05SQ(SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
0.06
0.13
0.19
0.25
0.32
0.38
0.44
0.50
Water
Pressure
Drop (kPa)
1.16
4.16
8.85
15.17
23.09
32.57
43.60
56.16
0.87
3.22
6.95
12.04
18.46
26.20
35.23
45.57
165
-
8.78
9.20
9.42
9.55
9.63
9.70
9.74
-
6.35
6.75
6.96
7.10
7.19
7.26
7.32
236
-
11.05
11.83
12.23
12.48
12.65
12.77
12.86
-
7.40
7.95
8.26
8.46
8.60
8.70
8.78
307
-
12.78
13.94
14.56
14.95
15.21
15.39
15.54
-
8.23
8.94
9.33
9.59
9.77
9.90
10.01
Table 39. Heating capacity (kW) - fan sizes 06SQ & 07SQ (SI)
Rows
1-Row
Capacity kW
2-Row
Capacity kW
L/s
0.06
0.13
0.19
0.25
0.32
0.38
0.03
0.06
0.13
0.19
0.25
0.32
0.38
Water
Pressure
Drop (kPa)
0.36
1.20
4.10
8.46
14.22
21.30
29.68
2.31
7.71
15.74
26.24
39.08
54.19
330
-
-
9.15
9.91
10.34
10.61
10.80
-
14.01
15.27
15.94
16.34
16.62
425
-
-
10.11
11.07
11.61
11.96
12.20
-
15.83
17.61
18.58
19.18
19.59
519
-
-
10.98
12.07
12.73
13.15
13.45
-
17.23
19.49
20.75
21.55
22.11
613
-
-
11.74
12.97
13.73
14.23
14.59
-
18.33
21.04
22.58
23.58
24.27
378
-
14.16
15.68
16.52
17.04
17.40
17.67
17.87
-
8.94
9.78
10.27
10.58
10.80
10.97
11.09
472
-
15.58
17.57
18.69
19.41
19.90
20.26
20.54
-
9.76
10.77
11.37
11.76
12.03
12.24
12.40
Airflow (L/s)
566
-
16.69
19.10
20.48
21.38
22.01
22.48
22.83
-
10.49
11.64
12.34
12.81
13.14
13.39
13.58
661
-
17.57
20.35
21.99
23.07
23.83
24.39
24.82
-
11.12
12.42
13.23
13.77
14.15
14.44
14.67
Airflow (L/s)
708
-
-
12.41
13.80
14.66
15.23
15.64
-
19.23
22.33
24.14
25.32
26.15
802
-
-
13.00
14.58
15.51
16.15
16.62
-
19.97
23.43
25.49
26.85
27.80
897
-
-
13.54
15.29
16.30
17.02
17.54
-
20.59
24.38
26.67
28.19
29.27
755
-
18.30
21.41
23.28
24.52
25.41
26.06
26.57
-
11.69
13.16
14.04
14.66
15.09
15.42
15.68
849
-
18.90
22.32
24.40
25.80
26.79
27.54
28.12
-
12.19
13.82
14.79
15.48
15.97
16.34
16.63
944
-
19.41
23.10
25.38
26.92
28.03
28.86
29.51
-
12.65
14.44
15.51
16.25
16.79
17.21
17.53
991
-
-
14.03
15.94
17.07
17.83
18.40
-
21.11
25.20
27.71
29.38
30.58
1085 1180 1274
-
-
14.49
16.55
17.78
18.60
19.22
-
21.57
25.93
28.63
30.45
31.76
-
-
14.90
17.12
18.46
19.34
20.00
-
21.97
26.57
29.46
31.42
32.83
-
-
14.90
17.12
18.46
19.34
20.00
-
21.97
26.57
29.46
31.42
32.83
1015
-
19.41
23.10
25.38
26.92
28.03
28.86
29.51
-
12.65
14.44
15.51
16.25
16.79
17.21
17.53
Water Coil Notes (SI)
1.
Fouling Factor = 0.0005.
2. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+ -----------------------------
WTD
=
EWT LWT
= kW
3. Capacity based on 21°C entering air temperature and 82°Centering water temperature. Refer to correction factors for different entering conditions.
Table 40. Temperature correction factors for water pressure drop (kPa)
Average Water Temperature
Correction Factor
93
0.970
88
0.985
82
1.000
77
1.020
71
1.030
66
1.050
60
1.080
54
1.100
49
1.130
43
1.150
Table 41. Temperature correction factors for coil capacity (kW)
Entering Water Minus Entering Air
Correction Factor
22
0.355
27
0.446
33
0.537
38
0.629
44
0.722
50
0.814
55
0.907
61
1.000
67
1.093
72
1.187
46 VAV-PRC012-EN
Performance Data
Low Height Parallel Fan-Powered Terminal Units
Table 42. Primary airflow control factory settings – I-P
Control Type
Direct Digital Control/
UCM
Pneumatic with
Volume Regulator
Analog Electronic
Air Valve Size
(in.)
5
6
8
8x14
5
6
8
8x14
5
6
8
8x14
Maximum Valve
Cfm
350
500
900
2200
350
500
900
2100
350
500
900
2200
Maximum
Controller Cfm
40-350
60-500
105-900
200-2200
63-350
73-500
134-900
297-2100
82-350
120-500
210-900
440-2200
Table 43. Primary airflow control factory settings – SI
Control Type
Direct Digital Control/
UCM
Pneumatic with Volume
Regulator
Air Valve Size
(in.)
5
6
8
8x14
5
6
8
8x14
Maximum Valve
L/s
165
236
425
1038
165
236
425
991
Analog Electronic
5
6
8
8x14
165
236
425
1038
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Maximum
Controller L/s
19-165
28-236
50-425
104-1038
30-165
35-236
63-425
140-991
39-165
57-236
100-425
208-1038
Table 44. Unit air pressure drop – in. wg (I-P)
Fan/Inlet Size
08SQ-05
08SQ-06
08SQ-08
09SQ-06
Airflow Cfm
150
200
250
350
200
300
400
500
400
600
800
900
200
300
400
500
Cooling Only Unit
(in. wg)
0.01
0.02
0.03
0.05
0.01
0.04
0.06
0.09
0.01
0.09
0.16
0.20
0.01
0.04
0.06
0.09
Notes:
1. Units with Electric Coils per fan size add 0.01" (3 Pa) to cooling only value.
2. HW Coil only pressure drops are just for the heating coil.
Fan/Inlet Size
09SQ-08
09SQ-8x14
10SQ-08
10SQ-8x14
Minimum Controller
Cfm
0, 40-350
0, 60-500
0, 105-900
0, 220-2200
0, 63-350
0, 73-500
0, 134-900
0, 297-2100
0, 82-310
0, 120-360
0, 210-660
0, 440-1475
Minimum Controller
L/s
0, 19-165
0, 28-236
0, 50-425
0, 104-1038
0, 30-165
0, 35-236
0, 63-425
0, 140-991
0, 39-146
0, 57-170
0, 100-311
0, 208-696
Constant Volume
Cfm
40-350
60-500
105-900
220-2200
63-350
73-500
134-900
297-2100
82-310
120-360
210-660
440-1475
Constant Volume
L/s
19-165
28-236
50-425
104-1038
30-165
35-236
63-425
140-991
39-146
57-170
100-311
208-696
Airflow Cfm Cooling Only Unit
(in. wg)
400
600
800
900
700
1100
1500
1900
400
600
800
900
725
1000
1200
1450
0.01
0.09
0.16
0.20
0.10
0.25
0.47
0.75
0.01
0.09
0.18
0.24
0.18
0.36
0.53
0.78
VAV-PRC012-EN 47
Performance Data
Table 45. Unit air pressure drop – Pa (SI)
Inlet/Fan Size
08SQ-05
08SQ-06
08SQ-08
09SQ-06
Airflow L/s
71
94
118
165
200
142
189
236
189
283
378
425
94
142
189
236
Cooling Only
Unit (Pa)
2
5
7
13
0.01
10
16
24
2
21
40
51
2
10
16
24
Notes:
1. Units with Electric Coils per fan size add 0.01" (3 Pa) to cooling only value.
2. HW Coil only pressure drops are just for the heating coil.
Table 46. Coil air pressure drop in. wg (I-P)
Fan Size Airflow Cfm 1-Row HW
(in. wg)
2-Row HW
(in. wg)
08SQ
09SQ
250
400
550
700
850
100
200
300
400
450
0.00
0.01
0.02
0.03
0.04
0.01
0.03
0.05
0.08
0.11
0.01
0.02
0.04
0.06
0.07
0.03
0.06
0.10
0.15
0.20
10SQ
725
800
900
1000
1100
1150
0.09
0.11
0.13
0.16
0.19
0.20
0.17
0.20
0.24
0.29
0.33
0.35
Note:
HW Coil Only pressure drops do not include unit pressure drop.
Inlet/Fan Size
09SQ-08
09SQ-8x14
10SQ-08
10SQ-8x14
Airflow L/s
189
283
378
425
330
519
708
897
189
283
378
425
345
475
565
685
Cooling Only
Unit (Pa)
2
21
40
51
26
63
116
185
2
23
45
59
47
91
131
195
Pa (SI)
Fan Size Airflow L/s 1-Row HW
(Pa)
08SQ
09SQ
10SQ
118
189
260
330
401
47
94
142
189
212
342
375
425
475
520
543
3
7
12
19
27
4
7
1
2
9
22
26
33
40
46
49
2-Row HW (Pa)
7
15
25
36
51
2
5
10
15
18
43
49
60
72
82
87
Table 47. Attenuator air pressure drop
Fan Size
08SQ
09SQ
10SQ
(I-P)
Plenum Cfm
150
250
350
450
350
500
650
800
Attenuator
not available
0.01
0.03
0.05
0.07
0.05
0.08
0.13
0.18
48
Fan Size
08SQ
09SQ
10SQ
(SI)
Plenum L/s
71
118
165
212
165
236
307
378
Attenuator
not available
0.01
0.01
0.02
0.02
0.02
0.03
0.04
0.05
VAV-PRC012-EN
Performance Data
Performance Data Fan Curves
LPCF and LPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa In. wg
150 0.60
125
0.50
100 0.40
75 0.30
50 0.20
25 0.10
150
71
200
94
Low-Height Parallel 08SQ—PSC
250
118
300
142
350
165
Airflow
400
189
450
212
500
236
550
Cfm
260
L/s
Pa In. wg
199 0.80
174
0.70
150
0.60
125 0.50
100
0.40
75
0.30
50 0.20
25 0.10
400
189
Pa In. wg
199
0.80
174 0.70
150 0.60
125
0.50
100 0.40
75 0.30
50 0.20
25 0.10
300
142
500
236
Low-Height Parallel 09SQ—PSC
500
236
600
273
700
330
Airflow
800
378
Low-Height Parallel 10SQ—PSC
900
425
700
330
1000
472
Cfm
L/s
900
425
Airflow
1100
519
1300
614
1500
708
Cfm
L/s
VAV-PRC012-EN 49
Performance Data
LPCF and LPEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa In. wg
125 0.50
100 0.40
LPxF 08SQ—ECM
75 0.30
50 0.20
25
0.10
50
24
150
71
250
118
Airflow
350
165
LPxF 09SQ—ECM
450
212
Cfm
L/s
Pa In. wg
125 0.50
100 0.40
75
0.30
50
0.20
25
0.10
200
94
300
142
400
189
500
236
600
283
Airflow
700
330
800
378
900
425
1000
472
1100
Cfm
519
L/s
50 VAV-PRC012-EN
Performance Data
Table 48. Heating capacity (MBh) - fan sizes 08SQ & 09SQ (I-P)
Rows
1-Row
Capacity MBH
2-Row
Capacity MBH
Gpm
0.5
1.0
1.5
2.0
2.5
1.0
2.0
3.0
4.0
5.0
Water
Pressure
Drop (ft)
0.80
2.67
5.43
9.02
13.39
0.89
3.02
6.24
10.47
15.66
100
7.73
8.58
8.90
9.06
9.17
9.36
9.74
9.86
9.92
9.96
200
10.43
12.15
12.83
13.20
13.43
15.49
16.83
17.29
17.53
17.67
300
12.20
14.51
15.52
16.07
16.43
19.69
22.20
23.11
23.59
23.88
400
13.50
16.37
17.69
18.42
18.89
22.72
26.42
27.82
28.56
29.01
Airflow (Cfm)
500
14.51
17.98
19.56
20.47
21.06
25.00
29.83
31.72
32.73
33.36
600
15.33
19.42
21.21
22.30
23.00
26.79
32.65
35.02
36.29
37.10
700
16.03
20.69
22.72
23.97
24.79
28.23
35.03
37.85
39.39
40.36
800
16.63
21.82
24.15
25.51
26.45
29.41
37.06
40.32
42.11
43.24
900
17.15
22.85
25.46
26.95
28.00
30.41
38.83
42.49
44.52
45.81
Table 49. Heating capacity (MBh) - fan size 10SQ (I-P)
Rows
1-Row Capacity
MBH
2-Row Capacity
MBH
Gpm
1.5
2.0
3.0
4.0
5.0
0.7
1.0
1.5
2.0
2.5
Water
Pressure
Drop (ft)
1.51
2.80
5.69
9.45
14.03
1.85
3.07
6.32
10.58
15.80
700
18.46
20.69
22.72
23.97
24.79
32.51
35.03
37.85
39.39
40.36
800
19.31
21.82
24.15
25.51
26.45
34.20
37.06
40.32
42.11
43.24
900
20.07
22.85
25.46
26.95
28.00
35.65
38.83
42.49
44.52
45.81
Airflow (Cfm)
1000
20.75
23.78
26.67
28.32
29.46
36.90
40.38
44.42
46.68
48.13
1100
21.37
24.64
27.79
29.62
30.83
38.01
41.76
46.15
48.62
50.22
1200
21.93
25.43
28.84
30.84
32.14
38.98
42.99
47.71
50.39
52.13
1240
22.14
25.72
29.24
31.30
32.66
39.34
43.44
48.29
51.06
52.84
Water Coil Notes (I-P)
Note: Fouling Factor = 0.0005.
Note: The off-coil temperature of the hot water coil on parallel fan-powered units must not exceed
140°F when mounted on plenum inlet.
Note: The following equations may be used in calculating Leaving Air Temperature (LAT) and
Water Temperature Difference (WTD).
LAT
=
EAT
+ --------------------------------------
VAV-PRC012-EN
WTD
=
EWT LWT
= ------------------------
Note: Capacity based on 70°F entering air temperature and 180°F entering water temperature.
Refer to correction factors for different entering conditions.
Table 50.
Temperature correction factors for water pressure drop (WPD)
Average Water Temperature 200 190 180 170 160 150 140 130 120 110
Correction Factor 0.970 0.985 1.000 1.020 1.030 1.050 1.080 1.100 1.130 1.150
Temperature correction factors for coil capacity (MBH)
Entering Water Minus Entering Air 40 50 60 70 80 90 100 110 120 130
Correction Factor 0.355 0.446 0.537 0.629 0.722 0.814 0.907 1.000 1.093 1.187
51
Performance Data
Table 51. Heating capacity (kW) - fan sizes 08SQ & 09SQ (SI)
Rows
1-Row Capacity kW
2-Row Capacity kW
L/s
0.03
0.06
0.09
0.13
0.16
0.06
0.13
0.19
0.25
0.32
Water Pressure
Drop (kPa)
2.39
7.98
16.24
26.97
40.04
2.65
9.03
18.65
31.29
46.82
47
2.27
2.51
2.61
2.66
2.69
2.74
2.85
2.89
2.91
2.92
94
3.06
3.56
3.76
3.87
3.94
4.54
4.93
5.07
5.14
5.18
142
3.58
4.25
4.55
4.71
4.81
5.77
6.51
6.77
6.91
7.00
Table 52. Heating capacity (kW) - fan size 10SQ (SI)
Rows
1-Row Capacity kW
2-Row Capacity kW
L/s
0.04
0.06
0.09
0.13
0.16
0.09
0.13
0.19
0.25
0.32
Water Pressure
Drop (kPa)
4.51
8.37
17.02
28.25
41.94
5.53
9.19
18.89
31.61
47.22
330
5.41
6.06
6.66
7.03
7.27
9.53
10.27
11.09
11.54
11.83
378
5.66
6.40
7.08
7.48
7.75
10.02
10.86
11.82
12.34
12.67
189
3.96
4.80
5.18
5.40
5.54
6.66
7.74
8.15
8.37
8.50
Airflow (L/s)
236 283
4.25
5.27
5.73
6.00
6.17
7.33
8.74
9.30
9.59
9.78
4.49
5.69
6.22
6.54
6.74
7.85
9.57
10.26
10.64
10.87
425
5.88
6.70
7.46
7.90
8.21
10.45
11.38
12.45
13.05
13.43
Airflow (L/s)
472
6.08
6.97
7.81
8.30
8.63
10.82
11.84
13.02
13.68
14.10
519
6.26
7.22
8.14
8.68
9.03
11.14
12.24
13.52
14.25
14.72
330
4.70
6.06
6.66
7.03
7.27
8.27
10.27
11.09
11.54
11.83
566
6.43
7.45
8.45
9.04
9.42
11.42
12.60
13.98
14.77
15.28
378
4.87
6.40
7.08
7.48
7.75
8.62
10.86
11.82
12.34
12.67
585
6.49
7.54
8.57
9.17
9.57
11.53
12.73
14.15
14.96
15.49
Water Coil Notes (SI)
1.
Fouling Factor = 0.0005.
2. The off-coil temperature of the hot water coil on parallel fan-powered units must not exceed
60°C when mounted on plenum inlet.
3. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+ -----------------------------
425
5.03
6.70
7.46
7.90
8.21
8.91
11.38
12.45
13.05
13.43
WTD
=
EWT LWT
=
----------------------------------
4. Capacity based on 21°C entering air temperature and 82°C entering water temperature. Refer to correction factors for different entering conditions.
Table 53.
Temperature correction factors for water pressure drop (kPa)
Average Water Temperature 93 88 82 77 71 66 60 54 49 43
Correction Factor 0.970 0.985 1.000 1.020 1.030 1.050 1.080 1.100 1.130 1.150
Temperature correction factors for coil capacity (kW)
Entering Water Minus Entering Air 22 27 33 38 44 50 55 61 67 72
Correction Factor 0.355 0.446 0.537 0.629 0.722 0.814 0.907 1.000 1.093 1.187
52 VAV-PRC012-EN
Performance Data
Low Height Series Fan-Powered Terminal Units
Table 54. Primary airflow control factory settings-I-P
Control Type
Direct Digital Control/UCM
Air Valve Size
(in.)
Maximum Valve
Cfm
5
6
8
8x14
350
500
900
2200
Pneumatic with Volume
Regulator
Analog Electronic
5
6
8
8x14
5
6
8
8x14
350
500
900
2100
350
500
900
2200
Maximum Controller
Cfm
40-350
60-500
105-900
200-2200
63-350
73-500
134-900
297-2100
82-350
120-500
210-900
440-2200
Minimum Controller
Cfm
0, 40-350
0, 60-500
0, 105-900
0, 220-2200
0, 63-350
0, 73-500
0, 134-900
0, 297-2100
0, 82-310
0, 120-360
0, 210-660
0, 440-1475
Constant Volume
Cfm
40-350
60-500
105-900
220-2200
63-350
73-500
134-900
297-2100
82-310
120-360
210-660
440-1475
Table 55. Primary airflow control factory settings-SI
Control Type
Air Valve Size
(in.)
Maximum
Valve L/s
Direct Digital Control/ UCM
Pneumatic with Volume Regulator
Analog Electronic
5
6
8
8x14
5
6
8
8x14
5
6
8
8x14
165
236
425
1038
165
236
425
991
165
236
425
1038
Note:
Maximum airflow must be greater than or equal to minimum airflow.
Maximum Controller
L/s
Minimum Controller L/ s
19-165
28-236
50-425
104-1038
30-165
35-236
63-425
140-991
39-165
57-236
100-425
208-1038
0, 19-165
0, 28-236
0, 50-425
0, 104-1038
0, 30-165
0, 35-236
0, 63-425
0, 140-991
0, 39-146
0, 57-170
0, 100-311
0, 208-696
Table 56. Unit air pressure drop
Fan/Inlet Size
08SQ-05
08SQ-06
08SQ-08
09SQ-06
in. wg (I-P)
Airflow Cfm
150
250
350
150
275
400
500
150
275
400
500
350
400
450
500
Cooling Only
0.01
0.03
0.11
0.02
0.14
0.35
0.58
0.01
0.05
0.13
0.21
0.17
0.26
0.37
0.50
Fan/Inlet Size
08SQ-05
08SQ-06
08SQ-08
09SQ-06
Pa (SI
Airflow L/s
71
118
165
71
130
189
236
71
130
189
236
165
189
212
236
19-165
28-236
50-425
104-1038
30-165
35-236
63-425
140-991
39-146
57-170
100-311
208-696
Cooling Only
3
14
32
52
2
9
28
5
34
86
143
43
66
93
124
VAV-PRC012-EN 53
Performance Data
Table 56. Unit air pressure drop (continued)
09SQ-08
09SQ-8x14
10SQ-08
10SQ-8x14
in. wg (I-P)
400
600
750
900
600
700
900
1050
400
600
800
600
900
1100
1500
0.08
0.38
0.84
0.21
0.50
0.77
1.47
0.08
0.24
0.40
0.61
0.18
0.27
0.51
0.73
Table 57. Coil air pressure drop in.wg (I-P)
Fan
Size Airflow Cfm
1-Row HW (in. wg)
2-Row HW (in. wg)
08SQ
09SQ
100
200
300
400
500
400
550
700
850
1000
0.00
0.01
0.02
0.03
0.05
0.03
0.06
0.09
0.13
0.18
0.01
0.03
0.05
0.07
0.10
0.07
0.12
0.17
0.24
0.32
10SQ
400
800
1200
1600
2000
0.01
0.03
0.06
0.11
0.16
0.02
0.07
0.12
0.20
0.29
Note:
HW Coil Only pressure drops do not include unit pressure drop.
Table 58. Attenuator air pressure drop
Fan Size
08SQ
09SQ
10SQ
(I-P)
Plenum Cfm
150
250
350
450
350
500
650
800
400
700
1000
1300
1600
Attenuator
0.02
0.04
0.06
0.09
0.06
0.10
0.15
0.22
0.02
0.05
0.09
0.14
0.20
54
09SQ-08
8x14-09SQ
10SQ-08
10SQ-8x14
Fan Size
08SQ
09SQ
10SQ
(SI)
Plenum L/s
71
118
165
212
165
236
307
378
189
330
472
614
755
Pa (SI
189
283
354
425
283
330
425
495
189
283
378
283
425
519
708
Pa (SI)
Fan Size Airflow L/s 1-Row HW (Pa) 2-Row HW (Pa)
08SQ
09SQ
10SQ
189
260
330
401
472
47
94
142
189
236
189
378
566
755
944
9
15
23
33
44
5
9
1
3
13
3
8
16
27
40
18
29
43
0
80
3
6
11
18
25
6
16
31
50
72
Attenuator
0.01
0.01
0.02
0.03
0.02
0.03
0.05
0.06
0.01
0.02
0.03
0.04
0.06
VAV-PRC012-EN
20
94
209
51
124
191
367
21
59
100
151
44
66
126
182
Performance Data
LSCF and LSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Note:
When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Pa In. wg
199 0.80
174 0.70
150
0.60
125
0.50
100
0.40
75 0.30
50 0.20
25 0.10
0 0.00
150
71
200
94
Low-Height Series 08SQ—PSC
250
118
300
142
350
165
Airflow
400
189
450
212
500
236
550
260
600
Cfm
283
L/s
Pa In. wg
199
0.80
174 0.70
150
0.60
125 0.50
100
0.40
75
0.30
50 0.20
25 0.10
0
0.00
300
142
Low-Height Series 09SQ—PSC
400
189
500
236
600
283
700
330
Airflow
800
378
900
425
1000
472
1100
Cfm
519
L/s
Pa In. wg
199
0.80
174
0.70
150
0.60
125 0.50
100 0.40
75
0.30
50 0.20
25 0.10
0
0.00
300
142
Low-Height Series 10SQ—PSC
500
236
700
330
900
425
1100
519
1300
614
Airflow
1500
708
1700
802
1900
897
2100
991
2300
Cfm
1086
L/s
VAV-PRC012-EN 55
Performance Data
LSCF and LSEF maximum
Minimum
1-row coil maximum
2-row coil maximum
Notes:
1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency.
2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
56
Pa In. wg
125
0.50
100
0.40
75 0.30
50 0.20
25 0.10
LSxF 08SQ—ECM
0
0.00
50
24
Pa In. wg
125 0.50
100
47
150
71
200
94
250
118
300
142
Airflow
LSxF 09SQ—ECM
350
165
400
189
450
212
500
236
Cfm
L/s
100 0.40
75
0.30
50 0.20
25 0.10
0
0.00
200
94
300
142
400
189
500
236
600
283
Airflow
700
330
800
378
900
425
1000
472
Cfm
L/s
Pa In. wg
125 0.50
100 0.40
75
0.30
50
0.20
LSxF 10SQ—ECM
25 0.10
0 0.00
300
142
500
236
700
330
900
425
1100
519
Airflow
1300
614
1500
708
1700
802
1900
Cfm
897
L/s
VAV-PRC012-EN
Performance Data
Table 59. Heating capacity (MBh) - fan sizes 08SQ & 09SQ (I-P)
Rows
1-Row Capacity
MBH
2-Row Capacity
MBH
Gpm
1.0
2.0
3.0
4.0
5.0
6.0
1.0
2.0
3.0
4.0
5.0
Water
Pressure
Drop (ft)
0.15
0.58
1.27
2.24
3.48
4.98
0.76
2.60
5.39
9.06
13.57
100
-
-
7.92
8.08
8.17
8.24
9.04
9.45
9.59
9.66
9.70
200
-
-
11.16
11.48
11.69
11.83
14.59
15.95
16.43
16.68
16.83
300
-
-
13.45
13.94
14.25
14.47
18.26
20.70
21.60
22.08
22.37
400
-
-
15.34
15.98
16.39
16.69
20.87
24.34
25.68
26.40
26.85
Airflow (Cfm)
500
-
-
16.97
17.76
18.28
18.65
22.83
27.24
29.01
29.96
30.56
600
-
-
18.42
19.36
19.99
20.43
24.35
29.61
31.78
32.96
33.71
700
-
-
19.73
20.82
21.54
22.06
25.57
31.59
34.14
35.54
36.43
800
-
-
20.92
22.16
22.98
23.58
26.58
33.28
36.17
37.78
38.80
900
-
-
22.01
23.39
24.32
24.99
27.42
34.74
37.95
39.75
40.90
1000
-
-
23.02
24.54
25.57
26.31
28.14
36.02
39.53
41.51
42.78
Table 60. Heating capacity (MBh) - fan size 10SQ (I-P)
Rows
1-Row Capacity
MBH
2-Row Capacity
MBH
Gpm
1.0
2.0
4.0
6.0
8.0
10.0
1.0
2.0
3.0
4.0
5.0
Water
Pressure
Drop (ft)
0.16
0.61
2.32
5.09
8.91
13.77
1.29
4.31
8.84
14.77
22.03
450
-
-
25.05
26.10
26.66
27.02
28.40
33.46
35.30
36.25
36.83
600
-
-
28.61
30.00
30.76
31.23
32.18
39.56
42.41
43.91
44.83
750
-
-
31.67
33.40
34.34
34.95
34.87
44.37
48.23
50.30
51.58
Airflow (Cfm)
900 1050 1200 1350 1500 1650 1800 1950
-
-
34.39
36.45
37.59
38.32
-
-
36.86
39.26
40.59
41.44
-
-
39.12
41.85
43.38
44.36
-
-
41.23
44.28
46.00
47.11
-
-
43.18
46.57
48.48
49.72
-
-
45.02
48.73
50.83
52.20
-
-
46.75
50.77
53.07
54.56
-
-
48.41
52.71
55.20
56.83
36.88
48.27
53.10
55.72
57.37
38.43
51.49
57.23
60.40
62.41
39.66
54.19
60.78
64.48
66.84
40.66
56.50
63.88
68.08
70.78
41.49
58.49
66.61
71.28
74.30
42.19
60.23
69.03
74.15
77.48
42.79
61.76
71.20
76.74
80.36
43.30
63.13
73.16
79.09
82.99
Water Coil Notes
1.
Fouling Factor = 0.0005.
2. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+
--------------------------------------
WTD
=
EWT LWT
= ------------------------
3. Capacity based on 70°F entering air temperature and 180°F entering water temperature. Refer to correction factors for different entering conditions.
Table 61. Temperature correction factors for water pressure drop (ft)
Average Water Temperature
Correction Factor
200 190 180 170 160 150 140 130 120 110
0.970 0.985
1.000 1.020 1.030 1.050 1.080 1.100
1.130
1.150
Table 62. Temperature correction factors for coil capacity (MBH)
Entering Water Minus Entering Air
Correction Factor
40 50 60 70 80 90 100 110 120 130
0.355 0.446 0.537 0.629 0.722 0.814 0.907 1.000 1.093 1.187
VAV-PRC012-EN 57
Performance Data
Table 63. Heating capacity (kW) - fan size 08SQ & 09SQ (SI)
Rows
1-Row Capacity kW
2-Row Capacity kW
L/s
0.06
0.13
0.19
0.25
0.32
0.38
0.06
0.13
0.19
0.25
0.32
Water Pressure
Drop (kPa)
0.44
1.72
3.81
6.71
10.40
14.90
2.27
7.78
16.11
27.08
40.58
47
-
-
2.32
2.37
2.39
2.41
2.65
2.77
2.81
2.83
2.84
94
-
-
3.27
3.36
3.42
3.47
4.28
4.67
4.82
4.89
4.93
142
-
-
3.94
4.08
4.18
4.24
5.35
6.07
6.33
6.47
6.56
189
-
-
4.50
4.68
4.80
4.89
6.12
7.13
7.53
7.74
7.87
-
-
4.97
5.21
5.36
5.47
6.69
7.98
8.50
8.78
8.96
Airflow (L/s)
236 283 330
-
-
5.40
5.67
5.86
5.99
7.14
8.68
9.31
9.66
9.88
-
-
5.78
6.10
6.31
6.47
7.49
9.26
10.00
10.41
10.68
378
-
-
6.13
6.49
6.74
6.91
7.79
9.75
10.60
11.07
11.37
425
-
-
6.45
6.86
7.13
7.32
8.04
10.18
11.12
11.65
11.99
472
-
-
6.75
7.19
7.49
7.71
8.25
10.56
11.58
12.16
12.54
Table 64. Heating capacity (kW) - fan size 10SQ (SI)
Rows
1-Row Capacity kW
2-Row Capacity kW
L/s
0.06
0.13
0.25
0.38
0.50
0.63
0.06
0.13
0.19
0.25
0.32
Water
Pressure Drop
(kPa)
0.48
1.82
6.93
15.22
26.64
41.16
3.84
12.90
26.43
44.15
65.84
212
-
-
7.34
7.65
7.81
7.92
8.32
9.81
10.35
10.62
10.79
283
-
-
8.38
8.79
9.01
9.15
9.43
11.59
12.43
12.87
13.14
354
-
-
9.28
9.79
10.07
10.24
10.22
13.00
14.14
14.74
15.12
425
-
-
10.08
10.68
11.02
11.23
10.81
14.15
15.56
16.33
16.81
495
-
-
10.80
11.50
11.90
12.15
11.26
15.09
16.77
17.70
18.29
Airflow (L/s)
566
-
-
11.47
12.27
12.71
13.00
11.62
15.88
17.81
18.90
19.59
637
-
-
12.08
12.98
13.48
13.81
11.92
16.56
18.72
19.95
20.74
708
-
-
12.66
13.65
14.21
14.57
12.16
17.14
19.52
20.89
21.78
779
-
-
13.19
14.28
14.90
15.30
12.36
17.65
20.23
21.73
22.71
849
-
-
13.70
14.88
15.55
15.99
12.54
18.10
20.87
22.49
23.55
920
-
-
13.70
14.88
15.55
15.99
12.54
18.10
20.87
22.49
23.55
Water Coil Notes
1.
Fouling Factor = 0.0005.|
2. The following equations may be used in calculating Leaving AirTemperature (LAT) and Water
Temperature Difference (WTD).
LAT
=
EAT
+
WTD
=
EWT LWT
=
kW
4.19
Lls
3. Capacity based on 21°C entering air temperature and 82°C entering water temperature. Refer to correction factors for different entering conditions.
Table 65. Temperature correction factors for water pressure drop (kPa)
Average Water Temperature
Correction Factor
93 88 82 77 71 66 60 54 49 43
0.970 0.985
1.000 1.020 1.030
1.050
1.080 1.100 1.130 1.150
Table 66. Temperature correction factors for coil capacity (kW)
Entering Water Minus Entering Air
Correction Factor
22 27 33 38 44 50 55 61 67 72
0.355 0.446 0.537 0.629 0.722 0.814 0.907 1.000 1.093 1.187
58 VAV-PRC012-EN
Electrical Data
Parallel Fan-Powered Terminal Units
Table 67. PSC motor units—electric coil kW guidelines – minimum to maximum (VPEF)
Single-Phase Voltage Three-Phase Voltage
Fan Size Stages
02SQ
1
2
03SQ
04SQ
05SQ
06SQ
07SQ
1
2
1
2
1
2
1
2
1
2
120V
0.5-5.0
0.5-5.0
0.5-5.0
0.5-5.0
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
-
-
-
-
208V
0.5-6.0
0.5-6.0
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
240V
0.5-6.0
0.5-6.0
0.5-10.0
0.5-10.0
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
-
-
-
-
277V
0.5-6.0
1.0-6.0
0.5-11.0
1.0-11.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.
0.5-12.0
1.0-12.0
0.5-11.0
1.0-11.0
347V
0.5-6.0
1.0-6.0
0.5-11.0
1.0-11.0
0.5-14.0
1.0-14.0
0.5-15.0
1.0-15.0
0.5-15.0
1.0-15.0
0.5-15.0
1.0-15.0
480V
0.5-6.0
1.0-6.0
0.5-11.0
1.0-11.0
0.5-14.0
1.0-14.0
0.5-18.0
1.0-18.0
0.5-16.0
1.0-16.0
0.5-20.0
1.0-20.0
208V
0.5-6.0
1.0-6.0
0.5-11.0
1.0-11.0
0.5-14.0
1.0-14.0
0.5-14.0
1.0-14.0
0.5-15.0
1.0-15.0
0.5-14.0
1.0-14.0
480V
1.0-6.0
2.0-6.0
1.0-11.0
2.0-11.0
1.0-14.0
2.0-14.0
1.0-18.0
2.0-18.0
1.0-16.0
2.0-16.0
1.0-20.0
2.0-20.0
600V
1.5-6.0
3.0-6.0
1.5-11.0
3.0-11.0
1.5-14.0
3.0-14.0
1.5-18.0
3.0-18.0
1.5-16.0
3.0-16.0
1.5-20.0
3.0-20.0
380V/
50Hz
1.0-6.0
1.5-6.0
1.0-11.0
1.5-11.0
1.0-14.0
1.5-14.0
1.0-18.0
1.5-18.0
1.0-16.0
1.5-16.0
1.0-20.0
1.5-20.0
Table 68. ECM units—electric coil kW guidelines – minimum to maximum (VPEF)
Single-Phase Voltage Three-Phase Voltage
Fan Size Stages
03SQ
04SQ
05SQ
06SQ
1
2
1
2
1
2
1
2
120V
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.0
0.5-4.0
0.5-4.0
0.5-4.0
208V
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-7.0
0.5-7.0
0.5-7.0
0.5-7.0
240V
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
277V
0.5-11.0
1.0-11.0
0.5-12.0
1.0-12.0
0.5-11.0
1.0-11.0
0.5-11.0
1.0-11.0
347V
-
-
-
-
-
-
-
-
480V
0.5-11.0
1.0-11.0
0.5-14.0
1.0-14.0
0.5-18.0
1.0-18.0
0.5-16.0
1.0-16.0
208V
0.5-11.0
1.0-11.0
0.5-14.0
1.0-14.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
480V
1.0-11.0
2.0-11.0
1.0-14.0
2.0-14.0
1.0-18.0
2.0-18.0
1.0-16.0
2.0-16.0
600V
-
-
-
-
-
-
-
-
Notes:
1. Coils available with 24-VAC magnetic or mercury contactors, load carrying P.E. switches, and P.E. switch with magnetic or mercury contactors.
2. Available kW increments are by 0.5 from 0.5 kW to 8.0 kW, by 1.0 kW from 9.0 to 18.0 kW, and by 2.0 kW from 18.0 to 20.0 kW.
3. Each stage will be equal in kW output.
4. All heaters contain an auto reset thermal cutout and a manual reset cutout.
5. See section
for formulas used to calculate the current amp draw for the heater elements.
6. Recommended coil temperature rise = 20° to 30°F (-7° to -1°C). Maximum temperature rise = 55°F (12°C).
7. Heaters should not operate at cfms below the nameplate minimum.
380V/
50Hz
-
-
-
-
-
-
-
-
Table 69. Fan electrical performance (PSC)
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
HP
1/8
1/3
1/3
1/2
1/2
1
115 VAC
1.6
4.3
5.5
6.7
-
-
Maximum Fan Motor Amperage (FLA)
208 VAC
-
-
-
-
4.6
6.6
277 VAC
0.7
1.6
2.0
2.4
3.8
4.7
VAV-PRC012-EN 59
Electrical Data
Table 69. Fan electrical performance (PSC)
Notes:
1. Electric Heat Units - Units with fan sizes 02SQ to 05SQ and a primary voltage of 208/60/1, 208/60/3, or 240/60/1 have 115/60/1 VAC fan motors. Fan sizes 06SQ and 07SQ with the same voltages, have 208/60/1 VAC motors.
2. Electric Heat Units - Units with primary voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors.
3. Electric Heat Units - Units with primary voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors.
4. With 380/50/3 and 230/50/1, use 230/50 motors.
Table 70. Fan electrical performance (ECM)
Fan Size
03SQ
04SQ
05SQ
06SQ
HP
1/3
1/2
1
1
Maximum Fan Motor Amperage (FLA)
115 VAC 277 VAC
4.5
6.5
10.1
9.5
Notes:
1. Electric heat units—units with primary voltages of 208/60/1, 208/60/3, or 240/60/1 have 115-VAC fan motors.
2. Electric heat units—units with primary voltages of 277/60/1, 480/60/1, or 480/60/3 have 277-VAC fan motors.
3. 347/60/1 and 230/50/1 voltage motors not available with ECMs.
2.4
3.5
5.4
5.1
Table 71. Minimum unit electric heat Cfm guidelines (PSC)
Unit kW
11
12
13
14
15
16
6.5
7
7.5
8
9
10
17
18
20
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
02SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
201
229
257
285
312
340
118
118
118
118
146
174
03SQ
630
-
-
-
-
-
375
400
430
460
515
575
-
-
-
200
230
260
290
315
350
200
200
200
200
200
200
04SQ
-
-
-
630
690
745
810
-
-
375
400
430
460
515
575
315
315
315
315
315
350
315
315
315
315
315
315
Cfm
05SQ
630
690
745
810
860
920
375
400
430
460
515
575
973
1030
-
350
350
350
350
350
350
350
350
350
350
350
350
06SQ
-
-
-
701
758
814
870
926
982
533
533
533
533
589
645
533
533
533
533
533
533
533
533
533
533
533
533
07SQ
730
779
827
876
924
972
585
585
585
585
633
682
1021
1069
1166
585
585
585
585
585
585
585
585
585
585
585
585
60 VAV-PRC012-EN
Electrical Data
Table 72. Minimum unit electric heat L/s guidelines (PSC)
Unit kW
11
12
13
14
15
16
6.5
7
7.5
8
9
10
17
18
20
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
02SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
95
108
121
134
147
160
56
56
56
56
69
82
03SQ
-
-
-
-
-
-
297
-
-
177
189
203
217
243
271
94
109
123
137
149
165
94
94
94
94
94
94
04SQ
297
326
352
382
-
-
177
189
203
217
243
271
-
-
-
149
149
149
149
149
165
149
149
149
149
149
149
L/s
05SQ
297
326
352
382
406
434
177
189
203
217
243
271
459
486
-
165
165
165
165
165
165
165
165
165
165
165
165
Table 73. Minimum unit electric heat Cfm guidelines (ECM)
Unit kW
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
6.5
7
7.5
8
9
10
03SQ
200
230
260
290
315
350
200
200
200
200
200
200
375
400
430
460
515
575
04SQ
315
315
315
315
315
350
315
315
315
315
315
315
375
400
430
460
515
575
Cfm
05SQ
350
350
350
350
350
350
350
350
350
350
350
350
375
400
430
460
515
575
06SQ
331
358
384
410
437
463
252
252
252
252
278
305
-
-
-
252
252
252
252
252
252
252
252
252
252
252
252
VAV-PRC012-EN
06SQ
560
560
560
560
560
560
560
560
560
560
560
560
560
560
560
560
604
649
07SQ
345
367
390
413
436
459
276
276
276
276
299
322
482
505
550
276
276
276
276
276
276
276
276
276
276
276
276
61
Electrical Data
Table 73. Minimum unit electric heat Cfm guidelines (ECM) (continued)
Cfm
Unit kW
11
12
13
14
15
16
17
18
03SQ
-
-
-
630
-
-
-
-
04SQ
630
690
745
810
-
-
-
-
Table 74. Minimum unit electric heat L/s guidelines (ECM)
Unit kW
11
12
13
14
15
16
17
18
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
03SQ
-
-
-
297
-
-
-
-
177
189
203
217
243
271
94
109
123
137
149
165
94
94
94
94
94
94
04SQ
297
326
352
382
-
-
-
-
177
189
203
217
243
271
149
149
149
149
149
165
149
149
149
149
149
149
L/s
05SQ
297
326
352
382
406
434
459
486
177
189
203
217
243
271
165
165
165
165
165
165
165
165
165
165
165
165
05SQ
630
690
745
810
860
920
973
1030
06SQ
327
348
369
390
411
432
-
-
264
264
264
264
285
306
264
264
264
264
264
264
264
264
264
264
264
264
06SQ
693
738
782
826
871
915
-
-
62 VAV-PRC012-EN
Electrical Data
Series Fan-Powered Terminal Units
Table 75. VSEF—electric coil kW guidelines – minimum to maximum (PSC motor units)
Fan
Size Stages 120V 208V
Single-Phase Voltage
240V 277V 347V
02SQ
03SQ
04SQ
05SQ
1
2
1
2
1
2
1
2
0.5-5.0
0.5-5.0
0.5-5.0
0.5-5.0
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
0.5-7.0
0.5-7.0
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
06SQ
07SQ
1
2
1
2
-
-
-
-
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
(a) 4.5, 5.5, 6.5, 9, 11, 13 kW not available
(b) 12 kW not available
(c) 10, 13 kW not available
(d) 16, 17 kW not available
(e) 18 kW not available
0.5-7.0
0.5-7.0
0.5-10.0
0.5-10.0
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
-
-
-
-
0.5-7.0
1.0-7.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
0.5-11.0
1.0-11.0
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
0.5-16.0
1.0-16.0
0.5-15.0
1.0-15.0
0.5-15.0
1.0-15.0
0.5-15.0
1.0-15.0
480V
1.0-7.0
1.5-7.0
1.0-13.0
(b)
0.5-18.0
1.0-18.0
0.5-20.0
1.0-20.0
0.5-22.0
1.0-22.0
0.5-20.0
1.0-20.0
208V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
0.5-15.0
1.0-15.0
0.5-14.0
1.0-14.0
0.5-15.0
1.0-15.0
0.5-14.0
1.0-14.0
Three-Phase Voltage
480V 600V 380V/50Hz
1.0-7.0
3.5-7.0
(a)
1.0-12.0
1.0-18.0
2.5-18.0
1.0-20.0
2.5-20.0
1.0-22.0
2.0-22.0
1.0-24.0
2.0-24.0
1.5-7.0
-
1.5-13.0
-
1.5-18.0
(d)
4.0-15.0
1.5-22.0
4.0-20.0
(e)
1.5-22.0
3.0-22.0
1.5-24.0
3.0-24.0
1.5-7.0
2.5-7.0
1.0-14
(c)
1.0-18
1.5-18
1.0-22.0
1.5-22.0
1.0-22
1.5-22
-
-
Table 76. VSEF—electric coil kW guidelines – minimum to maximum (ECM units)
Single-Phase Voltage Three-Phase Voltage
Fan
Size Stages
03SQ
04SQ
1
2
1
2
05SQ
06SQ
1
2
1
2
120V 208V
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-4.0
0.5-4.0
0.5-4.0
0.5-4.0
0.5-7.0
0.5-7.0
0.5-7.0
0.5-7.0
240V
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
277V
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
0.5-11.0
1.0-11.0
0.5-11.0
1.0-11.0
-
-
-
-
347V
-
-
-
-
480V
1.0-13.0
(a)
1.5-13.0
0.5-18.0
1.0-18.0
0.5-18.0
1.0-18.0
0.5-22.0
1.0-22.0
208V
0.5-14.0
1.0-14.0
0.5-14.0
1.0-14.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
480V
1.0-12.0
3.5-12.0
(b)
1.0-18.0
(c)
2.5-15.0
1.0-22.0
2.5-20.0
1.0-22.0
2.0-22.0
600V
-
-
-
-
-
-
-
-
Notes:
1. Coils available with electric, 24 VAC magnetic or contactors, load carrying P.E. switches, and P.E. switches with magnetic or mercury contactors.
2. Available kW increments are by 0.5 from 0.5 to 8.0 kW, by 1.0 kW from 9.0 to 17.0 kW, and by 2.0 kW from 18.0 to 24.0 kW.
3. Each stage will be equal in kW output.
4. All heaters contain an auto reset thermal cutout and a manual reset cutout.
5. See section
for formulas used to calculate the current amp draw for the heater elements.
6. Recommended coil temperature rise = 20°-30°F (-7° to -1°C). Maximum temperature rise = 55°F (12°C).
7. Heaters should not operate at cfms below the nameplate minimum.
(a) 12 kW not available
(b) 4.5, 5,5, 6.5, 9, 11 kW not available
(c) 16, 17 kW not available
380V/
50Hz
-
-
-
-
-
-
-
-
Table 77. Fan electrical performance (PSC)
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
HP
1/8
1/3
1/3
1/2
1/2
115 VAC
1.6
4.3
5.5
6.7
-
Maximum Fan Motor Amperage (FLA)
208 VAC
-
-
-
-
4.6
277 VAC
0.7
1.6
2.0
2.4
3.8
VAV-PRC012-EN 63
Electrical Data
Table 77. Fan electrical performance (PSC)
07SQ 1 6.6
4.7
Notes:
1. Electric Heat Units—Units with fan sizes 02SQ to 05SQ and a primary voltage of 208/60/1, 208/60/3 or 0/60/1 use 115/60/1 VAC fan motors. Fan sizes 06SQ and 07SQ in these same voltages, have 208/60/1 VAC fan motors.
2. Electric Heat Units—Units with primary voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors.
3. Electric Heat Units—Units with primary voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors.
4. With 380/50/3 and 230/50/1 use 230/50 motors.
Table 78. Fan electrical performance (ECM)
Fan Size
03SQ
04SQ
05SQ
06SQ
HP
1/3
½
1
1
Maximum Fan Motor Amperage (FLA)
120 VAC
4.5
6.5
10.1
9.5
277 VAC
2.4
3.5
5.4
5.1
Notes:
1. Acceptable selections are any point within the shaded area. The ECM will operate on a vertical performance line using the solid state speed controller provided.
2. The ECM motor provides constant volume with changing static pressure conditions. Therefore, the fan curves for the ECM are different compared to fan curves with PSC motors.
3. By using an ECM motor, less fan sizes are used because of the wider turn-down ratios.
Table 79. Minimum unit electric
Unit kW
11
12
13
14
15
16
6.5
7
7.5
8
9
10
17
18
20
22
24
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
02SQ
-
-
-
-
-
-
372
395
-
-
-
-
-
-
-
-
-
236
259
282
304
327
350
191
191
191
191
191
214
64
03SQ
630
690
745
810
-
-
375
400
430
460
515
575
-
-
-
-
-
260
260
260
290
315
350
260
260
260
260
260
260
Heat Cfm Guidelines (PSC)
04SQ 05SQ
630
690
745
810
860
920
375
400
430
460
515
575
315
315
315
315
315
350
315
315
315
315
315
315
973
1030
-
-
-
630
690
745
810
860
920
400
400
430
460
515
575
400
400
400
400
400
400
400
400
400
400
400
400
973
1030
1150
1260
-
06SQ
713
792
872
951
1031
1110
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
700
1190
1269
1428
1587
-
07SQ
850
902
954
1006
1057
1109
850
850
850
850
850
850
850
850
850
850
850
850
850
850
850
850
850
850
1161
1213
1317
1420
1524
VAV-PRC012-EN
Electrical Data
Table 80. Minimum unit electric
Unit kW
11
12
13
14
15
16
6.5
7
7.5
8
9
10
17
18
20
22
24
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
02SQ
-
-
-
-
-
-
-
-
-
176
186
-
-
-
-
-
-
112
122
133
144
154
165
90
90
90
90
90
101
03SQ
297
326
352
382
-
-
177
189
203
217
243
271
-
-
-
-
-
123
123
123
137
149
165
123
123
123
123
123
123
Heat L/s Guidelines (PSC)
04SQ 05SQ
297
326
352
382
406
434
177
189
203
217
243
271
459
486
-
-
-
149
149
149
149
149
165
149
149
149
149
149
149
297
326
352
382
406
434
189
189
203
217
243
271
459
486
543
595
-
189
189
189
189
189
189
189
189
189
189
189
189
06SQ
336
374
411
449
486
524
330
330
330
330
330
330
562
599
674
749
-
330
330
330
330
330
330
330
330
330
330
330
330
07SQ
401
426
450
475
499
524
401
401
401
401
401
401
548
572
621
670
719
401
401
401
401
401
401
401
401
401
401
401
401
VAV-PRC012-EN 65
Electrical Data
Table 81. Minimum unit electric
Unit kW
11
12
13
14
15
16
17
18
20
22
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
03SQ
630
690
745
810
-
-
-
-
-
-
375
400
430
460
515
575
260
260
260
290
315
350
260
260
260
260
260
260
Heat Cfm Guidelines (ECM)
04SQ 05SQ
630
690
745
810
860
920
375
400
430
460
515
575
973
1030
-
-
315
315
315
315
315
350
315
315
315
315
315
315
630
690
745
810
860
920
400
400
430
460
515
575
973
1030
1150
1260
400
400
400
400
400
400
400
400
400
400
400
400
06SQ
1006
1038
1069
1101
1133
1164
943
943
943
943
943
975
1196
1228
1291
1354
943
943
943
943
943
943
943
943
943
943
943
943
66 VAV-PRC012-EN
Table 82. Minimum unit electric
Unit kW
11
12
13
14
15
16
17
18
20
22
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
03SQ
297
326
352
382
-
-
-
-
-
-
177
189
203
217
243
271
123
123
123
137
149
165
123
123
123
123
123
123
Heat L/s Guidelines (ECM)
04SQ 05SQ
297
326
352
382
406
434
177
189
203
217
243
271
459
486
-
-
149
149
149
149
149
165
149
149
149
149
149
149
297
326
352
382
406
434
189
189
203
217
243
271
459
486
543
595
189
189
189
189
189
189
189
189
189
189
189
189
Electrical Data
06SQ
475
490
505
520
535
549
445
445
445
445
445
460
564
579
609
639
445
445
445
445
445
445
445
445
445
445
445
445
VAV-PRC012-EN 67
Electrical Data
Low Height Parallel Fan-Powered Terminal Units
Table 83. LPEF—electric coil kW guidelines – minimum to maximum (PSC motor units)
Single-Phase Voltage Three-Phase Voltage
Fan Size Stages
08SQ
09SQ
10SQ
1
2
1
2
1
2
120V
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.0
0.5-4.0
208V
0.5-7.0
0.5-7.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
240V
0.5-7.0
0.5-7.0
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
277V
0.5-7.0
1.0-7.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
347V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
0.5-14.0
1.0-14.0
480V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
0.5-14.0
1.0-14.0
208V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
1.0-13.0
1.0-13.0
480V
1.0-7.0
2.0-7.0
1.0-14.0
2.0-14.0
1.0-14.0
2.0-14.0
600V
1.5-7.0
3.0-7.0
1.5-14.0
3.0-14.0
1.5-12.0
3.0-12.0
380V/
50Hz
-
-
-
-
-
-
Table 84. LPEF–electric coil kW guidelines – minimum to maximum (ECM units)
Fan Size Stages
08SQ
09SQ
1
2
1
2
120V
0.5-5.0
0.5-5.0
0.5-4.5
0.5-4.5
208V
0.5-7.0
0.5-7.0
0.5-8.0
0.5-8.0
Single-Phase Voltage
240V
0.5-7.0
0.5-7.0
0.5-9.0
0.5-9.0
277V
0.5-7.0
1.0-7.0
0.5-12.0
1.0-12.0
347V
-
-
-
-
480V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
208V
0.5-7.0
1.0-7.0
0.5-14.0
1.0-14.0
Three-Phase Voltage
480V
1.0-7.0
2.0-7.0
1.0-14.0
2.0-14.0
600V
Notes:
1. Coils available with 24 VAC magnetic or mercury contactors, load carrying P.E. switches, and P.E. switch with magnetic or mercury contractors.
2. Available kW increments are by 0.5 from 0.5 kW to 8.0 kW and by 1.0 kW from 9.0 to 14.0 kW.
3. Each stage will be equal in kW output.
4. All heaters contain an auto thermal cutout and a manual reset cutout.
5. The current amp draw for the heater elements is calculated by the formula below.
-
-
-
-
380V/
50Hz
-
-
-
-
Table 85. Fan electrical performance (PSC)
Fan Size
08SQ
09SQ
10SQ*
HP
1/3
1/3
2 x 1/8
115 VAC
5.5
5.5
9.4
Maximum Fan Motor Amperage (FLA)
277 VAC
2.5
2.5
3.5
347 VAC
Notes:
1. Electric Heat Units - Units with Primary Voltage of 208/60/1, 208/60/3 or 240/60/1 use 115 VAC fan motors.
2. Electric Heat Units - Units with Primary Voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors.
3. Electric Heat Units - Units with Primary Voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors.
4. Values are for standard, single-speed, permanent split capacitor type motors. Consult factory for non-standard motor performance.
5. Motor amps for 10SQ are total amps for two motors.
1.8
1.8
3.0
Table 86. Fan electrical performance (ECM)
Fan Size
08SQ
09SQ
HP
1/2
1/2
Maximum Fan Motor Amperage (FLA)
115 VAC 277 VAC
2.0
6.7
1.1
3.6
68 VAV-PRC012-EN
Electrical Data
Table 87. Minimum unit electric heat guidelines
Unit kW
6.5
7
7.5
8
9
10
11
12
13
14
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
08SQ
378
407
-
-
-
-
-
-
-
-
202
232
261
290
319
349
173
173
173
173
173
173
Cfm (PSC
)
09SQ
440
440
468
496
552
608
664
720
776
832
440
440
440
440
440
440
440
440
440
440
440
440
10SQ
720
720
720
720
720
720
720
720
720
-
720
720
720
720
720
720
720
720
720
720
720
720
Unit kW
6.5
7
7.5
8
9
10
11
12
13
14
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
Table 88. Minimum unit electric heat Cfm guidelines (ECM)
08SQ
Cfm (ECM)
09SQ
409
440
-
-
-
-
-
-
-
-
220
251
283
314
346
377
188
188
188
188
188
188
490
490
514
539
588
637
685
734
783
832
490
490
490
490
490
490
490
490
490
490
490
490
Unit kW
6.5
7
7.5
8
9
10
11
12
13
14
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
Unit kW
6.5
7
7.5
8
9
10
11
12
13
14
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
08SQ
178
192
-
-
-
-
-
-
-
-
95
109
123
137
151
164
82
82
82
82
82
82
L/s (PSC
)
09SQ
208
208
221
234
261
287
313
340
366
393
208
208
208
208
208
208
208
208
208
208
208
208
10SQ
340
340
340
340
340
340
340
340
340
-
340
340
340
340
340
340
340
340
340
340
340
340
08SQ
193
208
-
-
-
-
-
-
-
-
104
118
133
148
163
178
89
89
89
89
89
89
L/s (ECM)
09SQ
231
231
243
254
277
300
323
347
370
393
231
231
231
231
231
231
231
231
231
231
231
231
VAV-PRC012-EN 69
Electrical Data
Low Height Series Fan-Powered Terminal Units
Table 89. LSEF-electric coil kW guidelines-minimum to maximum (PSC motor units)
Fan Size Stages
08SQ
1
2
09SQ
10SQ
1
2
1
2
120V 208V
0.5-4.5
0.5-4.5
0.5-6.0
0.5-6.0
0.5-4.5
0.5-4.5
0.5-4.0
0.5-4.0
0.5-8.0
0.5-8.0
0.5-7.5
0.5-7.5
Single-Phase Voltage
240V
-
-
0.5-10.0
0.5-10.0
0.5-8.0
0.5-8.0
277V
0.5-6.0
0.5-6.0
0.5-12.0
1.0-12.0
0.5-11.0
1.0-11.0
347V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-15.0
1.0-15.0
480V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-18.0
1.0-18.0
Three-Phase Voltage
208V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-13.0
1.0-13.0
480V
1.0-6.0
3.0-6.0
1.0-12.0
3.0-12.0
1.0-18.0
2.0-18.0
600V
1.5-6.0
5.0-5.0
1.5-12.0
4.5, 5, 9, 10
1.5-18.0
3.0-18.0
380V/
50Hz
-
-
-
-
-
-
Table 90. LSEF-electric coil kW guidelines-minimum to maximum (ECM units)
Single-Phase Voltage Three-Phase Voltage
Fan Size Stages
08SQ
1
2
09SQ
10SQ
1
2
1
2
120V
0.5-5.0
0.5-5.0
0.5-4.5
0.5-4.5
0.5-4.5
0.5-4.5
208V
0.5-6.0
0.5-6.0
0.5-8.0
0.5-8.0
0.5-8.0
0.5-8.0
240V
0.5-6.0
0.5-6.0
0.5-10.0
0.5-10.0
0.5-9.0
0.5-9.0
277V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-12.0
1.0-12.0
347V
-
-
-
-
-
-
480V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-18.0
1.0-18.0
208V
0.5-6.0
1.0-6.0
0.5-12.0
1.0-12.0
0.5-14.0
1.0-14.0
480V
1.0-6.0
3.0-6.0
1.0-12.0
3.0-12.0
1.0-18.0
2.0-18.0
Notes:
1. Coils available with 24 VAC magnetic or mercury contactors, load carrying P.E. switches, and P.E. switch with magnetic or mercury contactors.
2. Available kW increments are by 0.5 from 0.5 kW to 8.0 kW and by 1.0 kW from 9.0 to 18.0 kW.
3. Each stage will be equal in kW output.
4. All heaters contain an auto thermal cutout and a manual reset cutout.
5. The current amp draw for the heater elements is calculated by the formula below.
600V
-
-
-
-
-
-
380V/
50Hz
-
-
-
-
-
-
Table 91. Fan electrical performance (PSC)
Fan Size
08SQ
09SQ
10SQ*
HP 115 VAC
1/3 5.5
1/3
2 x 1/3
5.5
11.0
Maximum Fan Motor Amperage (FLA)
277 VAC
2.5
2.5
5.0
347 VAC
1.8
Notes:
1. Electric Heat Units - Units with Primary Voltage of 208/60/1, 208/60/3 or 240/60/1 use 115 VAC fan motors.
2. Electric Heat Units - Units with Primary Voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors.
3. Electric Heat Units - Units with Primary Voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors.
4. Values are for standard, single-speed, permanent split capacitor type motors. Consult factory for non-standard motor performance.
5. Motor amps for 10SQ are total amps for two motors.
1.8
3.5
Table 92. Fan electrical performance (ECM)
Fan Size
08SQ
09SQ
10SQ
HP 115 VAC
1/2 1.3
1/2
2 x 1/2
Maximum Fan Motor Amperage (FLA)
5.0
7.5
277 VAC
.7
2.7
4.0
70 VAV-PRC012-EN
Table 93. Minimum unit electric heat guidelines
(PSC)
Unit kW
11
12
13
14
15
16
17
18
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
08SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
276
293
309
325
341
357
228
228
228
228
244
260
Cfm
09SQ
635
687
-
-
-
-
-
-
403
429
455
480
532
584
377
377
377
377
377
377
377
377
377
377
377
377
10SQ
655
708
762
815
869
923
976
1030
440
440
467
494
547
601
440
440
440
440
440
440
440
440
440
440
440
440
Electrical Data
Unit kW
11
12
13
14
15
16
17
18
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
08SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
130
138
146
153
161
168
108
108
108
108
115
123
10SQ
309
334
360
385
410
435
461
486
208
208
220
233
258
284
208
208
208
208
208
208
208
208
208
208
208
208
L/s
09SQ
300
324
-
-
-
-
-
-
190
202
215
227
251
275
178
178
178
178
178
178
178
178
178
178
178
178
VAV-PRC012-EN 71
Electrical Data
Table 94. Minimum unit electric heat guidelines (ECM)
Unit kW
11
12
13
14
15
16
17
18
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
08SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
221
253
284
315
346
377
128
128
128
128
159
190
Cfm
09SQ
635
687
-
-
-
-
-
-
403
429
455
480
532
584
377
377
377
377
377
377
377
377
377
377
377
377
10SQ
680
730
779
829
879
929
979
1029
480
480
505
530
580
630
480
480
480
480
480
480
480
480
480
480
480
480
08SQ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
104
119
134
149
163
178
60
60
60
60
75
90
Unit kW
11
12
13
14
15
16
17
18
6.5
7
7.5
8
9
10
3.5
4
4.5
5
5.5
6
0.5
1
1.5
2
2.5
3
L/s
09SQ
300
324
-
-
-
-
-
-
190
202
215
227
251
276
178
178
178
178
178
178
178
178
178
178
178
178
10SQ
321
345
368
391
415
438
462
486
227
227
238
250
274
297
227
227
227
227
227
227
227
227
227
227
227
227
72 VAV-PRC012-EN
Electrical Data
Formulas
Fan-Powered Parallel
Minimum Circuit Ampacity (MCA) Equation
MCA = 1.25 x (
motor amps + heater amps)
Motor amps is the sum of all motor current draws if more than one is used in the unit.
Maximum Overcurrent Protection (MOP) Equation
MOP = (2.25 x motor1 amps) + motor2 amps + heater amps motor1 amps = current draw of largest motor motor2 amps = sum of current of all other motors used in unit
General Sizing Rules:
• If MOP = 15, then fuse size = 15
• If MOP = 19, then fuse size = 15 with one exception. If heater amps x 1.25 > 15, then fuse size = 20.
• If MOP is equal to or less than MCA, then choose next fuse size greater than MCA.
• Control fusing not applicable.
• Standard Fuse Sizes: 15, 20, 25, 30, 35, 40, 45, 50, and 60.
Example:
A modelVPEF, electric reheat unit size 10-05SQ has 480/3 phase, 12 kW electric reheat with 2 stages and 277-Volt motor.
For MOP of fan-powered unit:
12 kW-480/3 heater:12x1000/480x1.73=14.45 amps
MCA = (2.4 + 14.45) x 1.25 = 21.06, MOP = (2.25 x 2.4) + 14.45 = 19.9.
Since MOP is less than or equal to MCA, then MOP = 25.
For total current draw of unit:
12kW-480/3 heater:12x1000/480x1.73=14.45
Two heat outputs (2 stages) @0.5 amps max each=1.00
Motor amps: 277 V (Fan size 0517) =2.4
Amps Max: 18.35
Useful Formulas: kW
=
ATD
=
|
ATD
= kW
amps
=
PrimaryVoltage
amps
= kW = 1214 x L/s x ATD
VAV-PRC012-EN 73
Electrical Data
Fan-Powered Series
Minimum Circuit Ampacity (MCA) Equation
• MCA = 1.25 x (Smotor amps + heater amps)
Here motor amps is the sum of all motor current draws if more than one is used in the unit.
Maximum Overcurrent Protection (MOP) Equation
• MOP = (2.25 x motor 1amps) + motor2 amps + heater amps motor1 amps = current draw of largest motor motor2 amps = sum of current draw of all other motors used in units
General Sizing Rules:
• If MOP = 15, then fuse size = 15
• If MOP = 19, then fuse size = 15 with one exception. If heater amps x 1.25 > 15, then fuse size = 20.
• If MOP is less than/equal to MCA, then choose next fuse size greater than MCA.
• Control fusing not applicable.
• Standard Fuse Sizes: 15, 20, 25, 30, 35, 40, 45, 50, and 60.
Example:
A model VSEF, electric reheat unit size 10-0517 has 480/3 phase, 12 kW electric reheat with 2 stages and 277-Volt motor.
For MOP of fan-powered unit:
12 kW - 480/3 heater:12x1000/480x1.73=14.45 amps.
MCA=(2.4 + 14.45) x 1.25 = 21.06, MOP = (2.25 x 2.4) + 14.45 = 19.9.
Since MOP is less than/equal to MCA, then MOP = 25.
For total current draw of unit:
12 kW—480/3 heater:12x1000/480x1.73=14.45
Two heat outputs (2 stages)@0.5 amps max each=1.00
Motor amps: 277 V (Fan size 0517)=2.4
Total amps max: 18.35
Used Formulas:
amps
=
PrimaryVoltage kW
=
ATD
=
ATD
= kW
amps
= kW=1214 x L/s x ATD
74 VAV-PRC012-EN
Electrical Data
Low Height Parallel Fan-Powered
Minimum Circuit Ampacity (MCA) = (motor amps + heater amps) x 1.25
Maximum Overcurrent Protection (MOP) = (2.25 x motor amps) + heater amps
General Sizing Rules:
• If MOP = 15, then fuse size = 15
• If MOP = 19, then fuse size = 15 with one exception. If heater amps x 1.25 > 15, then fuse size = 20.
• If MOP £ MCA, then choose next fuse size greater than MCA.
• Control fusing not applicable.
• Standard Fuse Sizes: 15, 20, 25, 30, 35, 40, 45, 50, and 60.
Useful Formulas:
kW
=
ATD
=
ATD
= kW
kW
=
amps
=
PrimaryVoltage
amps
=
Low-Height Series Fan-Powered
Minimum Circuit Ampacity (MCA) = (motor amps + heater amps) x 1.25
Maximum Overcurrent Protection (MOP) = (2.25 x motor amps) + heater amps
General Sizing Rules:
• If MOP = 15, then fuse size = 15
• If MOP = 19, then fuse size = 15 with one exception. If heater amps x 1.25 > 15, then fuse size = 20.
• If MOP is less than/equal to MCA, then choose next fuse size greater than MCA.
• Control fusing not applicable.
• Standard Fuse Sizes: 15, 20, 25, 30, 35, 40, 45, 50, and 60.
Useful Formulas
kW
=
3amps
=
PrimaryVoltage 3
ATD
= kW
=
1amps
=
ATD
= kW
1214 Lls
VAV-PRC012-EN 75
Acoustics Data
Parallel Fan-Powered Terminal Units
Table 95. Discharge sound power (dB)
1, 2, 4
- valve only
Fan
Size
Inlet
Size
(in)
0.5" Inlet Pressure
Ps
5
1.0" Inlet Pressure
Ps
5
1.5" Inlet Pressure
Ps
3
2.0" Inlet Pressure
Ps
5
3.0" Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
02SQ 5 250 118 65 57 54 53 50 47
02SQ
02SQ
03SQ
04SQ
03SQ
04SQ
05SQ
03SQ
04SQ
05SQ
04SQ
05SQ
6
8
02SQ 10
03SQ 6
8
10
12
14
200 94 55 51 44 43 38 30 57 52 48 47 43 39
300 142 60 53 49 48 44 35 62 56 54 53 50 43
60 54 54 53 51 50 63 56 57 57 56 56
64 58 57 56 54 50 66 60 61 59 57 55
400 189 62 54 49 47 42 36 67 60 58 57 54 46 67 61 59 60 57 49 68 62 60 61 58 52 69 64 63 63 60 56
500 236 64 57 53 51 47 41 70 63 60 59 55 47 71 65 64 65 62 55 73 68 66 68 65 58
350 165 56 49 46 45 40 33 60 54 51 48 46 45
520 245 61 54 50 49 44 37 64 58 55 52 50 47
63 58 56 53 52 51 65 60 59 56 55 55
66 62 60 57 55 52 68 64 63 60 58 56
700 330 66 60 55 53 49 42 68 63 60 57 54 49 69 65 63 60 57 52 70 67 65 62 59 54 72 69 67 65 62 57
900 425 70 64 59 57 52 45 73 67 64 61 57 52 74 70 69 66 62 57 76 72 71 68 65 60
550 260 63 55 52 52 49 39 67 60 57 57 55 47
820 387 66 58 56 56 54 44 71 64 61 61 59 51
71 65 62 62 59 54 73 67 65 65 62 58
76 70 67 67 65 58 78 72 70 70 67 61
1100 519 69 61 59 59 58 48 73 67 64 65 63 55 77 70 68 68 66 58 79 72 70 70 68 60 82 75 73 74 71 64
1400 661 71 65 62 62 60 51 76 70 67 67 65 57 82 75 72 73 71 63 85 78 76 76 74 67
100 47 48 45 41 37 33 30 49 46 44 39 37 39
200 94 52 48 43 40 35 29 55 51 47 44 41 40
50 48 47 43 45 47 51 48 47 45 49 53
57 53 52 48 47 48 58 55 54 50 51 54
300 142 57 51 46 43 36 32 60 56 51 47 44 40 62 59 56 52 50 49 63 60 59 55 54 54
400 189 59 53 48 44 38 34 64 59 54 50 46 42 65 61 57 53 50 46 66 63 59 55 52 49 68 64 62 58 56 54
600 283 63 59 56 50 46 44 65 61 57 53 48 46
175 83 48 45 42 39 34 30 50 47 44 41 41 42
350 165 52 48 44 41 35 31 56 52 49 46 43 41
525 248 57 53 49 47 42 34 61 57 54 51 47 42
73 68 64 61 56 52 75 70 68 64 60 56
53 49 47 45 47 49 55 50 49 48 51 53
60 57 55 52 51 51 62 58 58 54 54 55
65 61 59 56 53 51 66 63 62 58 56 56
700 330 62 57 53 51 47 40 64 60 57 55 51 45 66 63 60 57 54 49 68 65 63 60 56 52 70 67 66 62 59 57
1050 496 68 64 60 59 51 46 72 68 65 63 59 53 73 70 68 67 63 57 75 72 71 69 65 60
275 130 52 48 46 44 38 32 54 51 49 47 46 47
550 260 57 52 50 47 42 35 60 57 54 51 48 43
56 54 53 51 50 49 58 56 56 54 54 53
63 62 60 57 55 54 65 64 63 60 58 56
825 389 61 56 53 50 46 39 64 61 58 56 52 46 67 66 64 60 58 53 70 69 68 64 62 59
1100 519 64 60 57 54 50 43 67 64 62 59 55 49 70 67 65 62 59 53 72 69 67 64 61 56 74 71 70 67 64 60
1640 774 69 66 63 59 54 48 73 70 68 64 61 55
385 182 52 48 47 41 38 34 56 52 51 46 43 41
76 74 72 69 66 60 79 77 75 73 70 64
59 57 57 52 50 48 59 59 60 55 54 53
775 366 58 53 52 49 43 37 63 59 57 54 50 47
1160 547 62 57 55 51 47 41 67 62 60 57 54 49
1550 732 65 60 58 54 50 44 70 65 63 60 57 51
1600 755 74 68 66 64 61 55
67 65 63 59 55 52 69 67 66 61 58 55
73 68 67 64 61 55 76 71 70 67 64 59
77 71 69 67 64 58 80 75 73 71 68 62
2350 1109 70 66 65 60 56 50 75 71 69 65 61 55
525 248 55 50 48 45 41 35 59 54 53 50 48 44
1050 496 61 56 54 51 51 40 67 62 60 57 54 49
1575 743 64 59 57 54 52 44 71 65 63 60 57 52
81 75 73 71 68 62 84 79 77 75 72 66
63 59 59 55 53 52 64 62 62 58 56 55
70 68 66 62 59 56 72 70 69 65 62 58
75 72 70 67 63 59 77 75 73 70 67 62
2100 991 67 62 60 57 53 47 72 68 66 62 59 56 76 72 69 66 63 59 79 74 72 70 66 61 82 78 76 73 70 65
3200 1510 72 68 67 63 59 55 77 72 71 67 64 59 83 78 76 73 70 65 87 82 79 77 74 69
76 VAV-PRC012-EN
Acoustics Data
Table 95. Discharge sound power (dB)
1, 2, 4
- valve only (continued)
Fan
Size
Inlet
Size
(in)
0.5" Inlet Pressure
Ps
5
1.0" Inlet Pressure
Ps
5
1.5" Inlet Pressure
Ps
3
2.0" Inlet Pressure
Ps
5
3.0" Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
06SQ
07SQ
06SQ
07SQ
06SQ
07SQ
06SQ
07SQ
10
12
14
16
550 260 53 49 46 43 38 31 56 54 51 49 45 41
800 378 57 53 50 46 41 34 60 58 55 52 48 42
1000 472 60 56 53 49 44 36 63 61 58 54 50 43
1100 519 66 65 62 58 54 49
1200 566 62 59 56 52 46 39 66 64 61 57 52 46
1350 637 64 61 58 54 48 42 68 66 63 59 54 48
800 378 63 56 55 54 51 42 68 62 61 61 59 51
1100 519 65 57 56 54 52 43 72 65 63 63 60 53
60 60 58 54 52 54 62 63 62 58 56 54
64 63 61 57 54 53 66 66 65 61 59 56
67 65 63 60 56 52 69 68 67 64 61 57
70 68 66 62 58 53 72 70 69 66 62 58
72 70 68 64 60 54 74 72 71 67 63 59
71 67 65 66 64 57 73 70 68 69 67 60
75 71 69 70 67 60 77 74 72 73 71 64
79 73 71 72 70 62 81 77 74 76 74 66 1400 661 66 59 58 54 52 44 74 67 64 64 62 54
1600 755 78 72 69 69 67 60
1700 802 67 61 60 55 52 44 75 69 66 65 62 55
2000 944 69 63 61 55 52 46 76 70 67 65 63 55
1100 519 60 54 53 51 48 41 65 60 58 57 54 48
1600 755 64 58 56 55 52 45 69 64 62 61 58 52
2100 991 67 61 60 57 55 47 72 67 66 64 61 55 75 70 68 67 64 58 77 72 71 69 67 61 80 76 74 72 70 65
2500 1180 70 64 63 60 57 50 74 69 67 66 63 56 80 74 72 71 69 63 83 77 76 74 72 66
3000 1416 73 67 66 63 60 53 77 71 69 68 65 58
1400 661 62 57 54 54 51 43 67 63 61 60 57 52
83 76 74 73 71 65 87 79 78 76 74 68
72 70 67 65 62 57 75 75 72 67 65 61
2100 991 64 60 58 56 54 46 71 66 63 62 60 55
2700 1274 67 63 61 59 56 49 73 68 66 65 62 57
2800 1321
3400 1605 70 65 64 62 58 52 75 70 68 66 64 58
4000 1888 73 68 67 64 61 55 77 72 70 68 65 60
77 71 69 68 66 61
82 75 72 73 71 63 84 79 76 77 76 68
84 77 74 74 71 64 86 81 78 78 77 69
69 66 64 61 60 55 73 71 69 64 62 59
74 70 68 66 64 59 77 73 71 69 67 62
76 73 71 69 67 62 78 76 74 72 70 65
79 74 72 71 69 64 82 78 76 75 73 68
82 75 74 72 70 65 86 79 77 76 74 69
84 77 75 74 71 66 89 80 78 77 75 70
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
Table 96. Radiated sound power (dB)
1, 2, 4
- valve only
Fan
Size
Inlet
Size
(in)
0.5" Inlet Pressure
Ps
5
1.0" Inlet Pressure
Ps
5
1.5" Inlet Pressure
Ps
3
2.0" Inlet Pressure
Ps
5
3.0" Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
02SQ 5 250 118 50 48 46 42 38 30
02SQ
02SQ
6
8
200 94 48 40 38 35 31 25 48 44 42 37 33 26
300 142 51 45 42 35 29 24 54 49 46 39 33 26
53 48 47 43 38 33 54 50 47 44 41 37
57 51 50 44 38 32 60 55 53 48 42 37
400 189 54 48 46 38 32 25 58 53 49 42 35 26 60 54 51 44 37 29 61 55 52 47 40 33 63 57 55 49 43 37
500 236 52 50 48 40 33 27 62 56 52 45 37 29 65 59 56 50 42 34 65 60 57 52 45 38
350 165 53 45 40 37 31 23 55 49 44 39 35 30
520 245 57 49 44 40 34 26 59 53 48 42 37 31
60 53 50 45 41 36 62 55 52 48 45 40
64 57 53 47 43 38 66 59 56 51 46 41
700 330 61 53 48 43 37 29 63 57 52 46 40 33 66 59 55 48 43 39 68 61 57 50 45 40 70 63 60 54 48 42
900 425 66 58 53 47 41 33 68 62 56 50 44 37 72 65 61 53 48 42 73 67 63 56 50 44
VAV-PRC012-EN 77
Acoustics Data
Table 96. Radiated sound power (dB)
1, 2, 4
- valve only (continued)
Fan
Size
Inlet
Size
(in)
0.5" Inlet Pressure
Ps
5
1.0" Inlet Pressure
Ps
5
1.5" Inlet Pressure
Ps
3
2.0" Inlet Pressure
Ps
5
3.0" Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
02SQ 10
03SQ
03SQ
04SQ
03SQ
04SQ
05SQ
03SQ
04SQ
05SQ
04SQ
05SQ
06SQ
07SQ
06SQ
07SQ
6
8
10
12
14
10
12
550 260 57 50 44 39 32 25 61 54 48 42 36 28
"820 387 59 52 46 41 34 25 64 58 52 46 40 31
65 58 52 46 40 34 67 60 56 50 43 38
69 63 56 51 44 37 71 66 60 54 47 40
1100 519 62 56 50 44 41 26 66 61 54 49 42 33 70 64 58 52 45 36 72 66 60 54 48 39 75 68 63 57 51 42
1400 661 65 60 53 47 44 30 68 64 57 52 45 36 74 69 63 57 50 41 77 71 66 60 53 44
100 47 49 44 38 37 31 24 50 46 41 41 35 29
200 94 50 44 39 37 31 24 53 48 43 41 36 29
52 47 44 46 41 36 53 48 45 48 45 40
56 51 47 46 42 36 59 53 49 49 45 40
300 142 52 45 40 38 31 25 54 50 45 42 36 30 59 53 50 47 42 37 60 55 53 49 45 40
400 189 54 47 42 39 33 26 57 53 48 44 38 31 59 55 51 46 41 35 61 55 52 48 43 38 62 57 55 50 46 41
600 283 58 53 50 45 40 34 58 56 54 48 42 35
175 83 52 45 39 36 33 26 54 47 42 41 36 30
350 165 57 50 43 38 33 26 59 52 46 42 37 30
525 248 58 51 45 39 34 27 61 55 48 43 38 31
64 61 58 51 45 39 67 62 60 53 48 42
57 50 45 46 42 36 59 52 46 49 45 39
61 54 50 47 43 37 63 55 52 50 46 40
64 57 53 48 44 37 66 58 56 51 47 41
700 330 60 53 47 42 36 30 63 56 51 45 39 33 64 58 53 47 42 35 66 60 55 49 44 37 68 62 58 52 48 41
1050 496 63 59 55 49 42 35 68 62 57 51 45 38 72 65 60 54 48 41 74 67 63 56 50 43
275 130 55 49 43 38 34 27 57 51 45 42 37 30
550 260 59 54 47 40 34 28 61 56 50 45 39 34
58 53 48 47 43 36 59 54 50 50 46 40
63 58 53 51 45 41 64 60 56 54 51 44
825 389 61 55 49 42 36 29 63 58 53 46 40 35 66 61 57 51 46 41 69 64 60 54 50 44
1100 519 62 56 50 44 38 32 66 60 54 49 43 37 68 62 57 51 46 40 70 64 59 53 48 43 72 66 62 56 51 46
1640 774 65 61 55 50 43 37 70 65 58 53 46 40
385 182 52 47 42 40 36 30 55 50 45 43 40 35
76 69 64 58 51 45 79 72 67 61 55 49
59 53 48 47 44 39 61 55 50 50 47 42
775 366 59 51 45 40 35 28 63 55 48 43 38 33
1160 547 63 54 47 41 35 30 67 58 51 46 39 35
1550 732 66 58 50 43 37 31 71 62 54 48 42 36
1600 755 73 64 57 51 44 39
66 59 52 48 44 39 69 62 56 52 48 42
72 63 56 51 45 40 75 67 60 54 49 43
75 66 59 53 46 41 78 70 63 56 50 44
2350 1109 69 64 55 49 42 36 74 68 59 52 45 40
525 248 58 51 45 40 34 27 61 53 48 44 38 31
1050 496 62 56 49 42 37 30 66 59 52 46 42 34
1575 743 65 59 52 44 37 31 70 62 55 48 42 35
1000 472 55 51 44 42 38 33 59 55 48 46 42 38
1100 519 63 59 53 49 46 42
79 72 64 57 50 44 82 75 67 60 54 47
64 56 51 49 44 37 66 59 54 51 47 40
71 63 57 51 46 39 74 66 60 54 49 42
75 67 61 54 48 40 78 70 64 57 51 43
2100 991 67 60 54 45 38 33 72 64 58 50 43 36 75 66 60 53 46 40 78 69 63 56 49 43 83 74 68 61 54 46
3200 1510 72 66 59 51 44 38 77 70 63 55 48 42 83 75 68 60 53 47 86 78 71 63 56 50
550 260 51 44 42 40 37 32 54 49 45 44 42 38
800 378 53 48 43 41 37 32 57 52 47 45 42 38
58 55 49 49 48 45 61 58 52 52 52 49
62 58 52 50 48 45 65 61 55 53 52 49
65 61 54 51 48 45 68 63 57 54 52 49
1200 566 58 53 47 43 38 33 62 58 51 47 42 38
1350 637 60 55 49 44 39 34 64 60 53 48 43 39
800 378 58 50 44 40 33 26 62 55 49 45 38 31
1100 519 60 52 46 40 33 27 65 58 51 47 40 33
1400 661 62 54 46 40 34 27 67 60 53 48 41 34
1600 755 73 65 58 53 46 40
1700 802 64 56 48 42 34 28 68 62 54 48 41 35
2000 944 65 58 49 47 36 31 70 63 55 50 42 35
67 63 56 52 48 45 70 65 59 56 52 49
69 65 58 53 49 45 72 67 61 57 53 49
66 60 54 50 43 36 68 63 56 52 46 39
70 64 58 53 46 39 72 66 60 56 50 42
73 66 60 55 48 41 75 69 64 58 52 44
76 68 61 56 49 42 78 72 66 60 54 46
77 70 62 57 50 43 79 73 67 61 55 48
78 VAV-PRC012-EN
Acoustics Data
Table 96. Radiated sound power (dB)
1, 2, 4
- valve only (continued)
Fan
Size
Inlet
Size
(in)
0.5" Inlet Pressure
Ps
5
1.0" Inlet Pressure
Ps
5
1.5" Inlet Pressure
Ps
3
2.0" Inlet Pressure
Ps
5
3.0" Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
06SQ
07SQ
06SQ
07SQ
14
16
1100 519 56 49 44 40 32 25 61 55 48 44 38 30
1600 755 59 53 47 42 35 27 65 59 52 48 41 33
66 61 54 49 43 36 69 66 57 51 45 40
70 64 58 53 46 39 74 68 61 55 49 42
2100 991 64 57 51 46 38 29 68 61 55 50 43 35 72 64 58 53 46 38 74 67 61 55 49 41 77 70 64 59 52 45
2500 1180 67 59 53 48 40 31 71 63 57 52 44 36 76 68 62 56 50 42 79 72 66 60 54 46
3000 1416 71 62 56 50 42 33 74 66 59 54 46 38
1400 661 63 54 48 41 36 29 67 59 53 46 42 35
2100 991 66 57 51 44 39 32 71 63 56 49 45 38
2700 1274 68 60 54 46 41 34 73 65 59 51 47 40
78 70 64 58 51 44 82 74 68 62 56 48
70 66 58 52 48 40 72 70 61 54 50 43
75 69 63 56 52 44 77 72 66 59 55 47
78 72 66 59 54 47 80 75 69 62 58 50
2800 1321
3400 1605 70 63 57 51 46 42 76 68 61 54 48 42
4000 1888 73 66 60 56 52 50 78 70 63 56 50 45
76 69 62 55 51 44
81 74 68 60 56 48 83 76 70 64 59 52
83 75 70 62 57 50 85 78 72 65 60 53
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
Table 97. Fan only sound power
Fan
02SQ
03SQ
04SQ
05SQ
Outlet
SP
0.25
0.25
0.25
0.25
CFM
200
280
350
430
500
(a)
250
400
610
850
1090
300
530
790
1100
1300
1350
350
650
970
1300
1550
l/s
373
519
614
637
401
514
142
250
165
307
458
614
732
236
118
189
288
94
132
165
203
Discharge Lw (dB)
3
Octave Bands
4 5 6 2
59 51
61 53
62 54
65 56
66 57
57 50
60 52
67 59
69 60
74 65
59 52
60 54
66 59
69 63
71 65
72 66
60 53
62 56
65 61
68 64
70 66
59
64
66
66
60
65
52
55
54
57
62
66
67
55
51
53
57
50
51
52
54
46 42
48 44
50 46
52 49
53 50
45 40
46 42
53 48
56 52
63 58
47 41
50 45
55 50
60 56
64 59
65 60
46 40
50 45
57 51
63 58
66 61
7 2
35 63
38 65
40 66
43 68
46 69
39 61
41 64
47 70
51 72
58 77
38 61
42 63
48 69
55 72
58 74
59 75
37 63
42 65
50 68
57 71
60 74
62
66
68
69
63
68
56
57
57
60
63
67
69
61
55
56
62
55
57
58
60
Radiated Lw (dB)
3
Octave Bands
4 5 6 7
44 37
46 40
48 42
50 45
52 48
42 35
45 40
51 48
55 53
60 59
43 34
47 41
52 49
57 55
60 59
61 60
42 35
47 43
53 51
59 57
62 61
53 50
54 52
55 52
57 54
58 56
53 49
55 51
60 56
62 59
66 64
54 49
56 51
60 56
64 60
66 63
67 64
54 48
57 51
62 57
65 62
68 65
VAV-PRC012-EN 79
Acoustics Data
80
Table 97. Fan only sound power (continued)
06SQ
07SQ
06SQ ECM
0.25
0.25
0.25
920
1200
1400
1700
1960
1050
1300
1500
1800
2020
800
1100
1500
1800
2100
850
953
378
519
708
850
991
925
496
614
708
434
566
661
802
65
67
69
68
69
60
62
68
61
62
64
60
61
63
65
Discharge Lw (dB)
66 61
69 64
71 65
73 68
75 70
62 61
65 65
67 67
69 68
70 69
68 61
71 64
74 67
76 69
78 71
56 51
59 54
61 56
63 58
66 62
55 49
58 53
61 56
65 60
66 62
57 51
59 54
63 58
66 60
68 63
48 71
51 73
54 75
57 77
60 79
46 67
50 69
53 70
57 73
59 74
49 71
52 73
56 76
58 78
62 80
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. all sound power levels, dB re: 10
-12
Watts
3. application ratings are outside the scope of the certification program
(a) AHRI 880-2011 section 7.2 Standard Rating Conditions
Radiated Lw (dB)
70
72
74
68
69
65
66
71
61
64
65
64
65
67
69
62 56
63 59
64 60
66 63
67 64
62 56
66 58
68 60
68 63
69 65
63 57
64 58
66 62
67 64
69 66
51 47
53 51
55 53
58 56
61 59
50 46
54 50
56 52
59 56
61 58
52 49
54 51
57 55
60 58
63 61
Table 98. Sound noise criteria (NC) - fan only
Fan
02SQ
03SQ
04SQ
05SQ
Outlet SP
0.25
0.25
0.25
0.25
CFM
300
530
790
1100
1350
350
650
970
1300
200
280
350
430
500
(a)
250
400
610
850
l/s
373
519
614
637
401
514
142
250
165
307
458
614
732
236
118
189
288
94
132
165
203
Fan-Only
0.25" Disch. Pres.
Discharge Radiated
16
21
23
24
20
26
--
--
--
--
18
22
24
19
--
--
17
--
--
--
17
35
39
41
43
38
44
28
31
28
32
37
40
44
34
27
30
35
27
29
30
33
VAV-PRC012-EN
Acoustics Data
Table 98. Sound noise criteria (NC) - fan only (continued)
Fan-Only
06SQ
07SQ
06SQ
ECM
0.25
0.25
0.25
920
1200
1400
1700
1050
1300
1500
1800
800
1100
1500
1800
2100
434
566
661
802
925
496
614
708
850
953
378
519
708
850
991
18
21
23
26
29
18
23
25
26
27
18
22
26
29
31
Notes:
1. “--” represents NC levels below NC 15.
2. NC values are calculated using modeling assumptions based on AHRI 885-2008 Appendix E.
3. application ratings are outside the scope of the certification program.
(a) AHRI 880-2011 section 7.2 Standard Rating Conditions
39
43
45
48
44
44
45
38
44
47
37
41
37
39
42
Table 99. AHRI 885-2008 discharge transfer function assumptions:
Small Box (<300 Cfm)
Medium Box (300-700 Cfm)
Large Box (>700 Cfm)
2
-24
-27
-29
3
-28
-29
-30
4
-39
-40
-41
Octave Band
5
-53
-51
-51
6
-59
-53
-52
7
-40
-39
-39
Notes:
Subtract from terminal unit sound power to determine discharge sound pressure in the space.
1. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2 Mineral Fiber
Insulation.
2. Application ratings are outside the scope of the Certification Program.
Table 100. AHRI 885-2008 radiated transfer function assumptions:
2 3 4
Octave Band
5 6 7
Type 2- Mineral Fiber Insulation
Total dB reduction
-18
-18
-19
-19
-20
-20
-26
-26
-31
-31
-36
-36
Notes:
Subtract from terminal unit sound power to determine discharge sound pressure in the space.
1. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2 Mineral Fiber
Insulation.
2. Application ratings are outside the scope of the Certification Program.
VAV-PRC012-EN 81
Acoustics Data
CFM
825
1100
1640
385
775
1160
1550
1600
400
175
350
525
700
1050
275
550
2350
525
1050
1575
2100
3200
900
550
820
1100
1400
100
200
300
500
350
520
700
250
200
300
400
l/s
366
547
732
755
389
519
774
182
330
496
130
260
189
83
165
248
1109
248
496
743
991
1510
661
47
94
142
425
260
387
519
236
165
245
330
118
94
142
189
Table 101. Sound noise criteria (NC) - valve only
Fan Size
Inlet
Size (in)
02SQ 5
02SQ
02SQ
02SQ
03SQ
03SQ
04SQ
03SQ
04SQ
03SQ
04SQ
05SQ
04SQ
05SQ
6
8
10
6
8
10
12
14
0.5”
--
--
17
--
17
24
--
--
23
--
--
--
--
--
--
23
--
--
--
23
--
16
20
16
--
--
18
--
--
--
24
--
--
16
19
26
30
--
19
23
26
31
Discharge
1,2,4
Inlet Pressure (Ps)
3,5
1.0” 1.5” 2.0”
21
16
19
23
18
22
29
--
18
28
--
--
17
--
--
--
29
--
--
--
27
17
22
25
23
--
16
22
--
--
20 20
24
30
19
22
25
23
26
30
24
28
34
--
24
30
--
19
22
--
--
19
36
--
--
17
30
23
29
32
25
16
21
26
--
16
21
26
31
35
16
26
31
34
38
3.0”
40
19
29
35
38
43
25
30
35
28
30
37
17
26
32
17
22
23
17
19
22
40
17
18
18
32
25
31
36
28
19
23
29
20
19
23
34
20
25
29
31
38
21
26
30
24
25
31
15
22
30
17
23
15
--
19
20
30
--
--
--
30
19
21
25
22
--
19
24
--
15
20
0.5”
40
24
30
35
38
44
Radiated
1,2,4
Inlet Pressure (Ps)
3,5
1.0” 1.5” 2.0”
20
26
31
36
27
30
36
19
26
33
19
25
22
15
21
24
34
--
16
19
33
24
27
31
26
18
22
26
15
20
23 25
30
35
25
27
33
30
38
42
32
35
43
22
30
38
22
27
26
19
24
27
40
18
21
24
38
29
34
38
31
24
27
33
21
24
26
39
42
47
27
36
42
45
52
3.0”
51
30
40
45
52
56
34
42
45
35
38
47
24
33
40
24
31
30
21
26
31
44
20
23
27
39
31
37
42
32
26
31
35
21
27
30
82 VAV-PRC012-EN
Acoustics Data
Table 101. Sound noise criteria (NC) - valve only (continued)
06SQ
07SQ
06SQ
07SQ
06SQ
07SQ
06SQ
07SQ
10
12
14
16
1100
1400
1600
1700
2000
1100
1600
2100
550
800
1000
1100
1200
1350
800
2500
3000
1400
2100
2700
2800
3400
4000
944
519
755
991
519
661
755
802
260
378
472
519
566
637
378
1180
1416
661
991
1274
1321
1605
1888
--
--
--
16
18
--
15
16
18
20
--
--
18
21
25
--
17
20
23
26
21
25
27
30
28
29
17
20
24
26
21
24
19
24
27
--
--
18
Discharge
1,2,4
18
20
23
23
26
29
25
30
33
32
29
31
29
30
29
31
34
38
37
39
24
29
32
33
37
39
20
24
26
29
31
29
33
37
39
42
30
32
36
38
43
35
36
38
42
46
15
16
19
21
24
20
22
25
27
29
18
21
27
31
36
26
30
33
35
39
19
21
24
27
30
25
29
31
29
33
36
40
33
35
24
31
36
39
43
45
Radiated
Notes:
1. “--” represents NC levels below NC 15.
2. NC Values are calculated using modeling assumptions based on AHRI 885-98-02 Addendum
3. Data at 1.5” inlet pressure constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Data at 0.5”, 1.0”, 2.0” and 3.0” are application ratings. These ratings are outside the scope of the certification program.
28
39
38
43
1,2,4
24
27
31
33
36
30
35
39
35
40
43
45
43
44
31
37
42
45
49
52
Table 102. Parallel inlet attenuator appurtenance effects (fan noise only)
Fan
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Closed-cell insulation
2
2
2
2
Discharge Sound Effect* (dB)
3
1
1
1
4
1
1
1
5
Matte-faced and foil-faced insulation, solid double-wall**
2
2
2
6
1
1
1
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
2
2
2
1
1
1
2
1
0
1
1
0
1
3
Radiated Sound Effect* (dB)
-2
-1
0
-1
-1
-1
4
-8
-8
-8
-3
-3
-3
Notes:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
** Note- Attenuators on double-wall units contain foil-faced insulation.
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10-12 Watts.
3. Application ratings are outside the scope of the Certification Program.
5
-13
-12
-12
-2
-2
-2
6
-15
-16
-15
-4
-4
-4
7
-16
-17
-18
-4
-4
-4
40
44
47
51
45
47
37
42
44
48
52
54
36
38
33
38
42
27
31
33
VAV-PRC012-EN 83
Acoustics Data
Table 103. Parallel cabinet lining appurtenance effects (fan noise and valve noise)
Fan
Solid double-wall
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Closed-cell insulation
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
2
3
1
3
1
1
1
Discharge Sound Effect* (dB)
3
1
-1
1
1
1
1
4
1
1
1
1
2
2
5
-1
3
1
0
2
1
6
1
4
3
1
2
2
7
3
5
5
4
3
4
2
1
1
-1
0
1
1
Radiated Sound Effect* (dB)
3
0
0
-1
0
2
0
Note:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10-12 Watts.
3. Application ratings are outside the scope of the Certification Program.
4
2
4
3
0
2
-1
5
2
4
4
1
5
2
6
4
8
4
5
4
5
7
7
5
6
7
8
5
Table 104. Parallel heating coil appurtenance effects
Fan
Hot Water Coil**
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Electric Heat***
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
2
-1
2
2
0
0
3
Discharge Sound Effect* (dB)
3
0
2
1
0
0
4
4
-1
2
0
0
0
3
5
-1
2
-1
-1
0
2
6
0
2
0
-2
0
4
7
-1
1
0
-1
1
4
2
-1
1
0
0
0
1
Radiated Sound Effect* (dB)
3
-1
1
0
0
0
0
4
Notes:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
** Add to fan sound only, not valve sound.
***Add to both fan sound and valve sound.
Apply fan only data, not valve sound.
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10-12 Watts.
3. Application ratings are outside the scope of the Certification Program.
0
1
0
0
0
0
5
0
0
0
-1
1
-1
6
0
0
0
-1
0
0
7
0
0
0
-3
0
-1
84 VAV-PRC012-EN
Acoustics Data
Series Fan-Powered Terminal Units
Table 105. Discharge sound power (dB)- fan and 100% primary
Fan
Size
Inlet
Size (in)
02SQ
03SQ
10
10
0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.0” Inlet Pressure Ps
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
200 94 71 55 54 52 49 45 72 61 56 54 52 51 74 70 66 62 59 55 74 64 63 61 59 59
250
480
720
960
300
500
600
700
142 71 56 55 52 49 46 72 61 57 54 52 52 74 69 65 61 58 56 75 67 66 63 60 60
236 71 57 56 52 49 47 72 61 58 54 52 53 74 68 64 60 57 59 76 74 73 67 63 63
283 72 60 59 55 52 50 74 63 60 56 54 55 75 67 64 60 58 59 76 72 69 64 61 62
330 73 62 61 57 55 53 75 64 61 58 56 56 75 66 63 59 58 58 76 69 64 61 59 60
118 57 49 47 43 38 34 57 50 48 43 39 34 58 52 48 44 40 36 59 53 48 45 41 39
227 61 53 52 49 45 43 62 55 53 49 46 43 63 57 53 49 46 44 64 59 53 50 47 45
340 66 58 58 55 53 52 68 60 59 56 54 52 68 63 58 55 53 52 70 65 59 55 53 52
453 71 63 63 61 59 59 72 64 63 62 59 59 74 67 64 62 60 60 74 68 64 62 60 59
04SQ 12
05SQ 12
06SQ 16
07SQ 16
04SQ
ECM
12
1200 566 76 67 67 66 64 65 77 68 67 66 64 64 79 71 68 67 65 65 79 72 68 68 65 65
330
620
156
293
58 52 49 45 39 34 59 53 49 45 40 35 62 57 50 46 40 38 63 59 51 46 42 40
62 55 54 51 46 43 63 57 54 51 47 44 67 62 55 52 47 46 68 64 55 52 48 47
930 439 66 59 59 57 54 53 68 61 59 57 55 53 72 67 60 58 55 54 73 69 60 58 55 54
1250 590 72 64 64 63 60 60 74 66 65 64 61 61 76 69 65 65 62 62 78 72 66 65 63 62
1550 732 77 69 68 68 66 66 77 70 68 69 66 66 80 72 69 70 67 67 81 75 70 70 68 67
400
760
189
359
56 52 52 46 40 38 57 53 52 47 41 39 59 54 52 47 42 40 60 56 53 48 43 41
61 58 58 54 49 48 62 58 57 54 49 48 65 60 57 53 49 48 66 62 58 54 50 48
1140 538 67 64 64 62 59 58 67 63 63 61 58 57 71 66 63 60 57 56 73 69 64 61 58 56
1500 708 73 69 69 68 65 64 73 69 69 67 65 64 75 70 69 68 65 64 77 72 69 68 65 64
1900 897 77 74 73 74 71 71 78 74 73 74 71 70 79 74 73 73 70 70 79 75 73 73 70 70
700 330 57 53 53 49 46 41 70 59 55 52 51 50 75 71 65 62 56 56 78 71 69 65 60 58
1200 566 63 59 58 55 52 48 72 63 60 57 55 54 77 72 67 64 60 60 80 75 71 67 64 62
1600 755 69 63 62 59 56 54 74 67 64 61 59 58 79 74 69 66 62 62 82 77 73 69 66 64
2100 991 75 69 67 65 62 61 77 71 69 66 63 62 81 76 72 69 66 66 84 80 75 72 70 68
2500 1180 77 72 69 67 65 64 79 74 71 69 66 65 83 78 74 71 69 68 86 82 77 74 72 70
850 401 62 58 51 53 47 51 66 60 53 54 47 52 69 63 56 56 52 58 75 69 62 59 54 63
1400 661 65 61 59 56 52 53 69 63 61 57 55 57 74 68 64 59 57 61 77 72 67 62 59 63
1900 897 69 66 65 61 58 57 73 67 66 61 59 60 77 71 68 63 61 63 80 75 70 65 63 64
2250 1062 72 69 68 64 62 61 75 70 69 64 62 62 79 73 71 65 64 65 82 77 72 67 65 66
2500 1180 74 71 71 67 65 63 76 72 71 67 65 65 79 74 73 67 66 67 83 77 73 69 67 67
3000 1416 77 75 75 71 69 68 79 75 75 71 69 69 81 77 76 71 70 70 85 79 76 72 70 70
275 130 56 51 49 44 38 37 57 52 49 44 38 38 58 53 49 44 39 39 59 55 50 45 41 40
620
930
293
439
61 55 54 51 46 45 63 57 54 51 47 46 65 60 55 51 47 47 66 62 55 52 48 47
66 59 59 57 54 53 68 61 59 57 55 53 72 67 60 58 55 54 73 69 60 58 55 54
1250 590 72 64 64 63 60 60 74 66 65 64 61 61 76 69 65 65 62 62 78 72 66 65 63 62
1550 732 77 69 68 68 66 66 77 70 68 69 66 66 80 72 69 70 67 67 81 75 70 70 68 67
1660 783 79 71 69 70 68 68 78 71 69 71 68 68 81 73 70 72 69 69 82 76 71 72 70 69
VAV-PRC012-EN 85
Acoustics Data
Table 105. Discharge sound power (dB)- fan and 100% primary (continued)
Fan
Size
Inlet
Size (in)
05SQ
ECM
06SQ
ECM
14
16
0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.0” Inlet Pressure Ps
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
350 165 57 51 50 45 39 39 57 52 50 45 40 39 57 53 49 46 40 40 59 54 50 47 42 41
760 359 62 58 57 54 49 49 62 58 57 53 49 48 64 60 56 53 49 48 66 62 57 54 50 49
1140 538 67 64 64 62 59 58 67 63 63 61 58 57 71 66 63 60 57 56 73 69 64 61 58 56
1500 708 73 69 69 68 65 64 73 69 69 67 65 64 75 70 69 68 65 64 77 72 69 68 65 64
1900 897 77 74 73 74 71 71 78 74 73 74 71 70 79 74 73 73 70 70 79 75 73 73 70 70
2350 1109 81 78 77 78 76 76 82 78 77 78 76 76 83 79 77 78 76 76 83 79 77 78 76 76
700 330 57 53 53 49 46 41 70 59 55 52 51 50 75 71 65 62 56 56 78 71 69 65 60 58
1200 566 63 59 58 55 52 48 72 63 60 57 55 54 77 72 67 64 60 60 80 75 71 67 64 62
1600 755 69 63 62 59 56 54 74 67 64 61 59 58 79 74 69 66 62 62 82 77 73 69 66 64
2100 991 75 69 67 65 62 61 77 71 69 66 63 62 81 76 72 69 66 66 84 80 75 72 70 68
2500 1180 77 72 69 67 65 64 79 74 71 69 66 65 83 78 74 71 69 68 86 82 77 74 72 70
1500 708 75 74 70 68 64 63 76 74 70 69 64 63
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Where Ps is the inlet static pressure minus discharge static.
4. Application ratings are outside the scope of the certification program.
Table 106. Radiated sound power (dB)
1,2,4
- fan and 100% primary
Fan
Size
Inlet
Size
(in)
0.5” Inlet Pressure
Ps
5
1.0” Inlet Pressure
Ps
5
1.5” Inlet Pressure
Ps
3
2.0” Inlet Pressure
Ps
5
3.0” Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
200 94 65 53 53 52 49 45 66 59 55 54 52 51 68 68 65 62 59 55 68 62 62 61 59 59
02SQ 10
03SQ 10
04SQ 12
05SQ 12
300 142 65 54 54 52 49 46 66 59 56 54 52 52
500 236 65 55 55 52 49 47 66 59 57 54 52 53
68 67 64 61 58 56 69 65 65 63 60 60
68 66 63 60 57 59 70 72 72 67 63 63
600 283 66 58 58 54 52 50 68 60 58 56 54 54 69 66 63 60 58 60 71 72 70 66 62 63
700 330 67 60 60 57 55 53 69 62 60 58 56 56 69 64 61 59 57 58 70 67 63 61 59 60 72 71 68 66 62 63
250 118 53 49 47 44 40 35 56 51 49 47 44 42
480 227 58 54 52 49 45 42 61 56 53 51 48 48
720 340 63 59 57 54 51 50 66 61 58 55 53 54
960 453 68 63 61 59 57 57 71 65 63 60 58 59
58 54 53 52 49 48 59 56 56 55 52 52
63 59 57 55 52 53 65 62 60 58 55 56
69 65 61 58 56 59 71 68 64 61 58 61
73 69 65 62 59 62 74 71 68 64 61 63
1100 519
1200 566 72 67 65 63 61 62 75 69 66 64 62 63
330 156 56 51 49 44 41 37 58 54 52 47 46 47
620 293 60 55 54 49 46 44 62 58 55 51 50 51
74 69 66 63 61 63
77 72 68 66 63 65 78 74 70 67 64 66
62 58 56 53 51 53 64 60 59 57 54 56
67 63 60 56 54 57 69 65 63 60 57 60
930 439 64 60 59 54 52 51 67 62 59 55 54 56
1250 590 69 65 63 59 58 57 72 66 64 60 59 60
1500 708
1550 732 74 69 67 65 63 63 76 71 68 65 64 64
77 71 68 65 64 65
73 68 64 59 58 62 74 71 67 63 60 65
76 71 66 62 61 65 78 74 69 65 63 67
400 189 57 54 50 45 44 40 60 56 53 49 50 50
760 359 61 58 55 51 50 47 64 60 57 53 54 54
1140 538 65 63 60 57 56 54 68 65 61 58 58 58
1500 708 69 67 65 63 62 60 72 69 65 63 62 62
79 73 69 66 65 67 80 76 72 68 66 68
63 60 57 53 52 55 65 62 60 57 54 57
68 64 60 56 55 59 70 67 64 60 57 61
73 69 64 60 59 63 75 73 68 63 61 65
76 72 68 64 63 65 78 75 70 66 65 67
1900 897 74 72 69 68 67 66 76 73 70 69 67 67 76 73 70 68 67 67 79 75 71 68 67 68 81 77 72 69 68 69
86 VAV-PRC012-EN
Acoustics Data
Table 106. Radiated sound power (dB)
1,2,4
- fan and 100% primary (continued)
Fan
Size
Inlet
Size
(in)
0.5” Inlet Pressure
Ps
5
1.0” Inlet Pressure
Ps
5
1.5” Inlet Pressure
Ps
3
2.0” Inlet Pressure
Ps
5
3.0” Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
06SQ 16
07SQ 16
04SQ
ECM
05SQ
ECM
06SQ
ECM
12
14
16
700 330 54 52 53 49 46 41 67 58 55 52 51 50
1200 566 60 58 58 55 52 48 69 62 60 57 55 54
1600 755 66 62 62 59 56 54 71 66 64 61 59 58
2100 991 72 68 67 65 62 61 74 70 68 66 63 62
2250 1062 69 68 68 64 62 60 72 69 69 64 62 62
2500 1180 71 70 71 67 65 63 73 71 71 67 65 65
2800 1321
3000 1416 74 74 75 71 69 68 76 74 75 71 69 69
76 74 74 69 68 68
72 70 65 62 56 56 75 70 69 65 60 58
74 71 67 64 60 60 77 74 71 67 64 62
76 73 69 66 62 62 79 76 73 69 66 64
78 74 72 69 66 66 81 79 75 72 70 68
2500 1180 74 71 69 67 65 64 76 73 70 69 66 65 78 75 72 70 68 67 80 76 74 71 69 68 83 81 77 74 72 70
850 401 59 57 51 53 47 51 63 59 53 54 47 52 66 62 56 56 52 58 72 68 62 59 54 63
1400 661 62 60 59 56 52 53 66 62 61 57 55 57
1900 897 66 65 65 61 58 57 70 66 66 61 59 60
71 67 64 59 57 61 74 71 67 62 59 63
74 70 68 63 61 63 77 74 70 65 63 64
75 72 71 65 64 65 79 75 72 67 65 66
76 73 73 67 66 67 80 76 73 69 67 67
275
620
130 56 52 49 44 41 38 59 54 52 47 46 47
293 60 56 54 49 47 45 63 58 56 51 50 52
930 439 64 60 59 54 52 51 67 62 59 55 54 56
1250 590 69 65 63 59 58 57 72 66 64 60 59 60
1550 732 74 69 67 65 63 63 76 71 68 65 64 64
1660 783 76 70 68 67 65 65 77 73 69 67 66 65
350 165 53 50 48 46 42 38 55 52 50 48 46 47
760 359 58 56 54 51 49 46 61 58 56 53 51 52
1140 538 63 62 60 56 55 53 66 63 61 57 56 57
1500 708 69 67 65 62 61 60 70 67 65 62 62 61
1900 897 73 71 69 68 66 66 74 71 69 67 66 66
2350 1109 75 74 72 72 71 71 77 75 72 72 71 71
700 330 54 52 53 49 46 41 67 58 55 52 51 50
1200 566 60 58 58 55 52 48 69 62 60 57 55 54
1600 755 66 62 62 59 56 54 71 66 64 61 59 58
2100 991 72 68 67 65 62 61 74 70 68 66 63 62
2500 1180 74 71 69 67 65 64 76 73 70 69 66 65
78 76 76 71 70 70 82 78 76 72 70 70
62 58 56 53 51 52 64 60 59 56 54 56
68 63 60 56 55 57 69 66 63 60 57 61
73 68 64 59 58 62 74 71 67 63 60 65
76 71 66 62 61 65 78 74 69 65 63 67
79 73 69 66 65 67 80 76 72 68 66 68
80 74 70 67 66 68 81 77 73 69 67 68
57 55 54 53 51 51 60 58 57 56 54 55
64 61 59 57 55 57 66 64 62 59 58 60
71 67 63 60 59 62 72 70 66 62 61 64
72 68 66 63 62 63 73 70 66 64 63 65
76 73 69 68 67 68 77 75 71 68 67 69
79 77 73 72 72 72 81 78 74 73 72 73
72 70 65 62 56 56 75 70 69 65 60 58
74 71 67 64 60 60 77 74 71 67 64 62
76 73 69 66 62 62 79 76 73 69 66 64
78 74 72 69 66 66 81 79 75 72 70 68
80 76 74 71 69 68 83 81 77 74 72 70
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
VAV-PRC012-EN 87
Acoustics Data
Table 107. Fan only sound power (dB)
Fan
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
03SQ
ECM
l/s
566
755
991
1180
401
661
897
1062
538
708
897
330
708
732
189
359
1180
1321
1416
94
227
340
453
555
156
293
439
590
340
453
519
566
326
330
118
227
94
142
236
283
Outlet
SP
0.25
0.25
0.25
0.25
0.25
0.25
0.25
CFM
1900
700
1200
1600
2100
2500
850
1400
1900
2250
2500
2800
930
1250
1500
1550
400
760
1140
1500
3000
200
480
720
960
1175
200
300
500
600
690
(a)
700
250
480
720
960
1100
1200
330
620
2
57
63
68
71
59
64
69
73
68
73
78
57
77
78
58
62
58
64
71
76
73
75
76
56
58
61
66
74
64
71
74
76
76
76
57
60
64
65
70
73
61
67
69
72
58
62
67
71
63
69
73
56
70
71
54
57
51
56
63
67
74
75
76
49
51
54
59
66
56
62
65
67
64
64
50
52
53
52
58
61
3
Discharge Lw (dB)
Octave Bands
4 5 6
53
59
65
69
57
62
67
71
64
69
73
52
68
68
52
56
53
57
63
67
72
74
76
47
48
53
59
65
58
63
65
67
61
61
48
54
52
51
56
59
50
56
62
66
55
61
67
71
62
68
73
50
68
69
48
54
48
54
62
66
69
72
73
44
45
51
58
65
54
61
64
67
59
60
45
49
46
47
54
57
45
54
60
64
51
57
64
69
59
65
70
44
65
66
42
50
45
52
59
63
67
69
71
38
40
47
54
62
52
59
62
64
56
56
40
45
41
42
50
53
2
55
59
63
66
60
63
68
72
63
69
73
58
74
75
54
58
53
57
67
70
69
70
71
51
56
59
63
69
60
67
70
73
66
66
52
55
56
57
61
64
7
41
54
61
65
49
56
64
69
58
65
70
39
65
66
39
48
43
51
59
63
68
70
72
37
34
44
53
61
51
58
62
64
55
55
34
41
33
34
47
52
Radiated Lw (dB)
Octave Bands
4 5
52
58
64
68
58
62
66
69
60
64
68
52
66
66
51
53
51
55
61
64
70
71
72
48
48
53
58
63
56
61
64
65
59
60
47
51
47
48
54
57
48
54
60
64
51
57
62
66
57
62
67
47
63
64
44
49
46
51
59
62
66
68
70
42
42
47
53
59
53
59
61
63
56
56
43
47
43
44
50
53
6
41
50
56
61
47
53
60
64
55
60
66
41
62
63
40
47
42
49
56
60
64
66
68
35
37
44
51
58
50
56
59
61
53
53
37
42
36
39
47
50
3
56
62
64
67
58
62
67
71
62
67
71
55
68
69
52
56
50
55
62
66
69
71
72
48
51
54
58
64
57
63
65
67
61
62
49
52
49
48
56
59
7
36
48
55
59
44
51
59
63
52
59
65
34
61
62
33
43
40
47
56
60
62
65
67
34
30
40
49
56
49
56
60
62
51
51
28
39
28
32
43
48
88 VAV-PRC012-EN
Acoustics Data
Table 107. Fan only sound power (dB)
Fan
04SQ
ECM
05SQ
ECM
06SQ
ECM
Outlet
SP
0.25
0.25
0.25
CFM
275
620
930
1250
1550
1660
350
760
1140
1500
1900
2350
700
1200
1600
2100
2500
l/s
538
708
897
1109
330
566
755
991
1180
732
783
165
359
130
293
439
590
2
52
57
61
67
71
61
67
72
77
71
73
52
55
51
54
59
65
56
60
63
69
73
65
72
77
82
76
78
57
60
56
60
63
70
3
Discharge Lw (dB)
Octave Bands
4 5 6
53
57
61
67
70
62
68
72
76
69
70
50
55
48
55
59
65
51
55
59
66
70
60
66
72
77
69
70
46
52
45
51
57
65
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. all sound power levels, dB re: 10
-12
Watts
3. application ratings are outside the scope of the certification program
(a) xAHRI 880-2011 section 7.2 Standard Rating Conditions
45
50
55
62
66
57
64
70
75
67
68
40
49
39
48
55
63
Table 108. Sound noise criteria (NC) fan and 100% primary
Fan
Size
02SQ
03SQ
04SQ
Inlet
Size
(in)
10
10
12
l/s
453
519
566
156
293
439
590
708
732
94
142
236
283
330
118
227
340
CFM
960
1100
1200
330
620
930
1250
1500
1550
200
300
500
600
700
250
480
720
29
--
--
17
24
0.5”
Discharge
Inlet Pressure (Ps)
1.0” 2.0” 3.0”
27
--
--
16
23
25
25
25
26
30
--
--
18
24
26
26
26
28
30
--
--
21
26
30
29
28
30
31
--
16
23
27
28
30
35
32
30
30
--
--
18
26
30
33
--
19
25
29
34
33
16
22
28
31
35
40
23
28
34
38
43
0.5”
35
21
26
32
36
29
29
30
33
7
44
49
55
63
67
57
64
70
76
68
70
39
48
37
47
55
63
2
56
57
60
66
70
61
67
72
76
68
69
52
56
52
55
59
65
3
50
54
57
63
67
59
65
70
75
67
68
49
52
49
52
58
64
Radiated Lw (dB)
Octave Bands
4 5
50
55
60
64
68
58
63
68
72
67
68
47
51
48
52
58
64
46
51
56
62
66
55
61
67
71
65
66
43
48
42
48
54
61
6
43
48
52
59
63
54
61
66
71
64
65
38
46
37
45
53
60
42
26
30
34
39
Radiated
Inlet Pressure (Ps)
1.0” 1.5” 2.0”
35
23
27
33
38
30
31
32
33
36 38
27
32
36
40
40
39
38
38
41
44
31
35
39
43
44
44 47
46
34
38
43
46
49
3.0”
44
31
35
39
44
37
40
48
46
7
36
45
51
58
62
52
60
66
71
63
64
34
43
35
43
52
59
VAV-PRC012-EN 89
Acoustics Data
Table 108. Sound noise criteria (NC) fan and 100% primary (continued)
Fan
Size
05SQ
06SQ
07SQ
04SQ
ECM
05SQ
ECM
06SQ
ECM
Inlet
Size
(in)
12
16
16
12
14
16
CFM l/s
359
538
708
897
1109
330
566
755
991
1180
1416
130
293
439
590
732
783
165
991
1180
401
661
897
1062
1180
1321
189
359
538
708
897
330
566
755
760
1140
1500
1900
2350
700
1200
1600
2100
2500
3000
275
620
930
1250
1550
1660
350
2100
2500
850
1400
1900
2250
2500
2800
400
760
1140
1500
1900
700
1200
1600
0.5”
Discharge
Inlet Pressure (Ps)
1.0” 2.0” 3.0”
25
28
31
30
33
17
21
33
21
24
26
--
--
21
28
24
27
30
28
31
--
18
34
--
15
20
--
--
22
28
39
--
15
20
--
22
28
34
28
31
24
30
33
--
34
--
--
17
34
--
--
18
26
30
31
--
--
21
28
33
39
21
24
26
30
33
30
33
33
36
38
22
26
33
30
31
33
--
17
24
29
37
--
17
25
29
34
35
--
17
24
29
33
39
30
31
33
36
38
0.5”
40
44
47
43
45
26
34
45
27
33
37
24
30
35
40
34
37
38
40
43
28
31
35
32
34
37
--
19
27
31
41
--
19
28
31
35
36
--
19
27
31
35
39
32
34
37
40
43
51
23
28
34
38
43
44
22
28
35
40
45
48
27
33
37
43
45
Notes:
1. “--” represents NC levels below NC 15.
2. NC Values are calculated using modeling assumptions based on AHRI 885-98-02 Addendum
3. Data at 1.5” inlet pressure constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Data at 0.5”, 1.0”, 2.0” and 3.0” are application ratings. These ratings are outside the scope of the certification program.
48
31
35
39
31
36
40
45
44
46
39
44
45
24
51
26
31
34
Radiated
Inlet Pressure (Ps)
1.0” 1.5” 2.0”
41
45
47
44
46
28
36
46
31
35
39
27
32
36
40
46
48
44
47
49
48
50
32
39
47
42
43
45
32
35
40
44
50
50
42
43
45
34
38
41
45
48
50
43
47
48
28
52
31
35
39
3.0”
46
48
49
52
55
39
43
50
45
47
49
35
39
45
47
51
45
47
49
37
42
42
47
52
55
46
49
50
32
52
34
38
43
Table 109. AHRI 885-2008 discharge transfer function assumptions:
2 3 4
Octave Band
5
Small Box (<300 Cfm)
Medium Box (300-700 Cfm)
Large Box (>700 Cfm)
-24
-27
-29
-28
-29
-30
-39
-40
-41
Notes:
Subtract from terminal unit sound power to determine discharge sound pressure in the space.
1. NC Values are calculated using modeling assumptions based on AHRI 885-2008.
2. Where DPs is inlet static pressure minus discharge static pressure.
3. Application ratings are outside the scope of the Certification Program.
-53
-51
-51
6
-59
-53
-52
7
-40
-39
-39
90 VAV-PRC012-EN
Acoustics Data
Table 110. AHRI 885-2008 radiated transfer function assumptions:
2 3 4
Octave Band
Type 2- Mineral Fiber Insulation
Total dB reduction
-18
-18
-19
-19
-20
-20
Notes:
Subtract from terminal unit sound power to determine radiated sound pressure in the space.
1. NC Values are calculated using modeling assumptions based on AHRI 885-2008.
2. Where DPs is inlet static pressure minus discharge static pressure.
3. Application ratings are outside the scope of the Certification Program.
5
-26
-26
6
-31
-31
Table 111. Series inlet attenuator appurtenance effects
Fan
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Closed-cell insulation
2
2
2
2
Discharge Sound Effect* (dB)
3
2
2
2
4
2
2
2
5
Matte-faced and foil-faced insulation, solid double-wall**
3
3
3
6
3
3
3
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
7
2
2
2
2
2
2
2
-3
-1
1
1
1
1
Radiated Sound Effect* (dB)
3
-3
-3
-3
-2
-2
-2
4
-9
-10
-8
-5
-5
-5
Notes:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
** Note – Attenuators on double-wall units contain foil-faced insulation.
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
watts.
3. Application ratings are outside the scope of the Certification Program.
5
-10
-14
-9
-4
-4
-4
6
-12
-17
-8
-6
-6
-6
Table 112. Series cabinet lining appurtenance effects
Fan
Solid double-wall
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Closed-cell insulation
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
2
0
0
0
0
0
0
Discharge Sound Effect* (dB)
3
0
0
0
0
0
0
4
0
0
0
0
0
0
5
0
0
0
0
0
0
6
0
0
0
0
0
0
7
0
0
0
0
0
0
2
0
0
1
-1
1
1
Radiated Sound Effect* (dB)
3
0
0
3
-1
1
5
Note:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10-12 watts.
3. Application ratings are outside the scope of the Certification Program.
4
0
1
2
0
2
3
5
2
2
5
1
2
4
6
3
3
8
1
2
6
Table 113. Series heating coil appurtenance effects
Fan
Hot Water Coil
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
Electric Heat
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
2
1
1
2
-4
2
4
Discharge Sound Effect* (dB)
3
2
3
6
-1
1
4
4
2
1
4
0
2
2
5
1
2
4
0
1
2
6
2
2
4
1
-1
3
7
2
1
3
0
-1
1
2
2
0
6
-1
0
2
Radiated Sound Effect* (dB)**
3
2
2
5
0
1
3
4
Notes:
* Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
** Radiated effect applies to “fan only” sound only. Do not apply to fan + valve sound.
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10-12 Watts.
3. Application ratings are outside the scope of the Certification Program.
2
1
2
-1
1
3
5
0
1
4
2
2
2
6
0
1
3
2
2
2
7
-36
-36
7
3
4
8
2
2
6
-17
-20
-10
-6
-6
-6
7
7
2
2
3
0
1
2
VAV-PRC012-EN 91
Acoustics Data
Low Height Parallel Fan-Powered Terminal Units
Table 114. Discharge sound power (dB)
1,2,4
Fan
Size
Inlet
Size
(in)
0.5” Inlet Pressure
Ps
5
1.0” Inlet Pressure
Ps
5
1.5” Inlet Pressure
Ps
3
2.0” Inlet Pressure
Ps
5
3.0” Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
08SQ
08SQ
09SQ
08SQ
09SQ
09SQ
10SQ
5
6
8
8 x
14
8 x
14
150 71 55 48 44 39 32 29 58 51 49 45 38 38
200 94 58 51 47 42 36 31 61 54 51 47 40 39
58 52 50 47 44 46 60 54 52 49 47 50
62 56 53 50 46 47 63 57 55 52 49 51
250 118 62 54 49 45 40 33 63 57 53 48 42 40 65 59 56 51 45 44 65 60 56 53 48 48 66 61 58 54 51 52
300 142 65 56 51 48 43 37 66 60 55 50 45 42 69 62 59 55 50 48 69 64 61 57 54 54
350 165 67 59 54 50 46 41 69 62 57 53 49 44
200 94 56 49 45 40 34 29 58 52 50 44 38 37
280 132 60 53 49 44 40 33 62 56 54 48 44 40
350 165 63 57 53 48 44 37 65 60 57 52 48 42
71 65 61 57 51 49 73 68 64 61 58 55
61 55 52 50 47 48 63 57 54 51 49 52
65 59 56 53 50 48 67 61 58 55 52 52
68 62 59 56 53 49 70 64 61 58 55 53
69 64 60 56 54 47 400 189
430 203 67 62 57 52 50 42 68 64 60 56 54 46
500 236 71 65 61 56 53 45 71 67 63 59 57 49
350 165 58 51 48 44 39 31 61 55 53 48 44 40
500 236 61 55 52 48 44 36 65 59 56 52 48 43
600 283 64 58 54 50 47 39 67 61 59 54 51 45
700 330
800 378 68 63 59 56 52 44 71 66 63 59 56 49
72 67 64 60 57 51
71 66 63 59 56 50 73 68 65 61 58 54
73 69 66 62 60 53 75 71 68 64 62 56
65 60 57 53 50 49 67 62 60 55 53 52
69 64 61 57 54 51 71 66 64 59 57 54
71 67 64 60 57 53 73 69 66 62 59 56
900 425 70 65 61 58 55 47 73 68 64 61 58 51
780 368 64 63 58 52 48 45 69 69 62 56 52 54
1100 519 66 64 61 54 52 48 70 69 66 59 56 55
1500 708 69 67 65 58 56 51 73 69 71 62 61 57
1560 736
1800 850 71 69 68 61 59 53 75 71 74 65 63 58
2200
103
8
78 73 76 68 65 61
75 73 74 66 63 60
75 71 68 64 62 56 78 74 71 68 64 59
77 72 69 66 63 57 80 75 73 70 67 61
73 70 72 61 56 55 77 74 78 66 59 56
76 72 75 64 61 58 79 76 80 68 63 59
79 75 79 69 66 62 83 78 82 72 68 63
81 76 80 71 68 63 83 78 82 73 70 65
82 77 81 73 70 65 84 79 83 75 72 67
780 368 65 60 52 48 41 34 68 66 60 57 45 42
1170 552 72 69 62 58 51 46
1560 736
1800 850
2000 944
70 68 66 65 51 50 72 69 69 69 56 54
75 74 70 68 56 52 76 76 75 73 59 56
76 74 70 65 59 53 78 76 72 68 60 55 79 79 76 74 63 59
79 77 75 70 63 57 81 80 77 74 65 60
80 78 78 71 65 59 82 80 78 74 67 61
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
92 VAV-PRC012-EN
Acoustics Data
Table 115. Radiated sound power (dB)
1,2,4
Fan
Size
Inlet
Size
(in)
0.5” Inlet Pressure
Ps
5
1.0” Inlet Pressure
Ps
5
1.5” Inlet Pressure
Ps
3
2.0” Inlet Pressure
Ps
5
3.0” Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
08SQ
08SQ
09SQ
08SQ
09SQ
09SQ
10SQ
5
6
8
8 x
14
8 x
14
150 71 53 44 38 33 28 21 54 45 40 36 31 25
200 94 55 46 41 35 29 21 56 48 42 37 32 25
54 47 42 40 38 34 56 49 45 46 42 38
57 50 45 42 38 34 58 51 47 46 42 38
250 118 56 49 44 36 30 22 59 50 44 38 33 26 59 50 46 41 36 32 60 52 48 43 39 34 61 53 48 47 43 38
300 142 59 50 45 38 31 24 62 52 47 40 34 28 62 54 50 45 40 34 63 55 50 48 44 38
350 165 62 51 46 39 33 26 65 55 50 43 36 30
200 94 53 45 40 33 27 21 56 48 43 35 29 22
280 132 54 46 40 33 27 22 57 50 45 37 30 24
350 165 54 46 41 34 28 22 58 51 46 38 31 25
65 56 51 47 41 35 65 57 53 50 45 39
57 48 44 40 37 32 58 50 45 45 42 37
59 51 47 42 37 33 61 53 48 46 42 37
62 54 49 44 38 34 63 55 50 47 43 38
62 55 50 42 36 31 400 189
430 203 56 49 43 36 30 25 60 53 48 40 33 27
500 236 59 53 47 40 34 29 62 55 50 42 35 30
350 165 57 50 45 38 34 23 59 54 46 40 34 26
500 236 60 53 47 40 34 24 62 56 49 42 36 28
600 283 62 54 49 41 34 24 65 58 51 44 37 29
700 330
800 378 65 57 52 44 36 26 69 61 54 46 40 32
69 61 55 47 40 33
64 57 52 46 39 35 66 58 53 49 43 38
66 58 53 47 41 36 68 60 55 51 44 39
61 55 48 43 39 35 63 56 50 47 44 37
65 58 51 46 41 35 67 60 54 50 45 38
68 60 54 47 42 35 70 62 56 51 46 38
900 425 66 58 53 45 37 28 71 63 56 48 41 33
780 368 62 59 55 48 40 31 66 61 57 51 44 38
1100 519 64 60 56 47 40 32 68 63 60 52 45 38
1500 708 68 62 58 47 39 32 71 65 64 53 46 39
1560 736
1800 850 71 63 59 47 39 32 73 67 68 54 47 39
2200
103
8
76 70 73 55 48 40
73 68 67 58 51 43
73 64 58 50 44 36 74 66 60 54 48 40
75 66 60 52 45 37 76 67 62 55 48 40
70 63 61 53 48 43 72 66 63 55 51 46
72 66 65 57 52 45 74 68 66 59 54 48
75 69 70 62 56 47 77 72 70 63 58 50
77 71 72 62 56 47 79 73 73 64 59 50
80 74 75 62 55 47 82 75 76 65 58 49
780 368 60 55 47 41 32 28 63 61 55 48 38 34
1170 552 68 65 57 50 41 39
1560 736
1800 850
2000 944
66 63 60 55 45 41 69 66 64 59 50 45
71 69 66 59 48 45 74 74 69 64 53 48
73 71 64 56 47 46 74 72 66 59 49 47 76 74 71 65 54 50
75 74 68 61 51 49 77 76 72 65 55 51
76 75 70 62 52 50 78 77 72 65 55 52
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
VAV-PRC012-EN 93
Acoustics Data
Table 116. Fan only sound power (dB)
Fan
08SQ
09SQ
10SQ
08SQ
ECM
09SQ
ECM
l/s
83
2
61
70
74
77
77
76
78
67
69
74
70
71
74
64
67
71
73
72
71
75
77
61
64
67
70
81
83
463
566
661
670
378
425
330
396
222
189
236
330
118
151
189
217
217
189
283
330
71
109
146
179
425
481
Outlet
SP
0.25
0.25
0.25
0.25
0.25
CFM
175
700
840
980
1200
1400
1420
150
230
310
380
460
400
600
700
900
1020
250
320
400
460
(a)
470
400
500
700
800
900
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. all sound power levels, dB re: 10
-12
Watts
3. application ratings are outside the scope of the certification program
(a) AHRI 880-2011 section 7.2 Standard Rating Conditions
63
67
71
71
67
70
59
60
65
61
62
65
56
58
62
64
65
61
64
66
55
57
59
61
71
73
3
53
Discharge Lw (dB)
Octave Bands
4
51
5
47
6
41
59
64
67
67
65
69
56
58
65
58
59
63
55
58
61
64
64
58
62
64
51
54
57
61
70
72
56
61
65
65
64
67
51
53
62
54
56
61
50
53
58
62
61
54
59
63
46
49
53
57
68
70
51
56
60
60
57
61
45
48
58
48
49
54
44
48
54
58
55
47
52
56
40
44
48
51
62
65
Table 117. AHRI 885-2008 add discharge transfer function assumptions:
Small Box (< 300 CFM)
Medium Box (300-700 CFM)
Large Box (> 700 CFM)
2
-24
-27
-29
3
-28
-29
-30
Notes:
Subtract from terminal unit sound power to determine discharge sound pressure in the space.
1. NC Values are calculated using modeling assumptions based on AHRI 885-2008.
2. Where DPs is inlet static pressure minus discharge static pressure.
3. Application ratings are outside the scope of the Certification Program.
Octave Band
4 5
-39
-40
-41
-53
-51
-51
2
65
70
73
76
76
74
77
67
68
77
69
70
72
68
72
75
76
76
69
72
75
66
69
71
74
79
81
7
34
47
54
57
57
56
61
40
43
56
44
46
53
40
45
51
56
54
45
51
56
34
39
45
50
62
64
Radiated Lw (dB)
Octave Bands
4
57
5
50
6
41
60
64
67
67
70
72
57
58
69
62
64
68
60
63
65
69
66
61
65
68
56
58
62
64
72
74
57
61
64
64
67
69
54
55
64
56
58
64
53
56
61
63
63
56
61
64
50
52
56
59
69
72
53
57
60
60
57
60
49
50
56
46
48
54
44
48
52
55
54
47
51
55
42
44
47
50
61
64
3
56
65
69
72
72
71
74
61
63
67
65
66
69
58
61
64
66
67
64
67
71
58
60
62
64
75
78
7
35
50
55
58
58
49
53
44
46
50
38
40
46
38
42
47
50
51
41
45
49
36
40
44
47
55
58
6
-59
-53
-52
7
-40
-39
-39
94 VAV-PRC012-EN
Acoustics Data
Table 118. AHRI 885-2008 radiated transfer function assumptions:
2 3
Type 2- Mineral Fiber Insulation
Total dB reduction
-18
-18
-19
-19
Notes:
Subtract from terminal unit sound power to determine radiated sound pressure in the space.
1. NC Values are calculated using modeling assumptions based on AHRI 885-2008.
2. Where DPs is inlet static pressure minus discharge static pressure.
3. Application ratings are outside the scope of the Certification Program.
-20
-20
4
Octave Band
5
-26
-26
6
-31
-31
7
-36
-36
Table 119. Sound noise criteria (NC) - valve only
Fan
Size
08SQ
08SQ
09SQ
08SQ
09SQ
09SQ
10SQ
Inlet
Size
(in)
5
6
8
8x14
8x14
CFM
150
780
1100
1500
1560
1800
2200
780
1170
1560
1800
2000
600
700
800
900
430
500
350
500
200
280
350
400
200
250
300
350
l/s
71
368
519
708
736
850
1038
368
552
736
850
944
283
330
378
425
203
236
165
236
94
132
165
189
94
118
142
165
0.5”
--
--
--
--
--
17
21
24
21
24
20
21
25
20
25
--
--
16
27
17
25
28
27
27
27
22
26
--
17
20
Inlet Pressure (Ps)
3,5
1.0”
--
Discharge
1,2,4
1.5” 2.0”
--
--
--
18
16
19
23
26
21
--
17
21
17
21
26
29
23
25
28
18
23
26
26
31
33
28
31
34
30
32
24
27
32
33 36
37
38
36
37
26
33
3.0”
--
16
20
24
19
23
26
32
34
37
33
36
38
28
31
20
25
28
39
40
40
38
39
27
36
0.5”
--
--
--
--
16
18
21
25
29
30
30
31
33
17
21
19
22
25
36
24
Notes:
1. “--” represents NC levels below NC 15.
2. NC Values are calculated using modeling assumptions based on AHRI 885-98-02 Addendum
3. Data at 1.5” inlet pressure constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Data at 0.5”, 1.0”, 2.0” and 3.0” are application ratings. These ratings are outside the scope of the certification program.
34
36
32
35
39
22
25
23
25
29
Inlet Pressure (Ps)
3,5
1.0”
--
Radiated
1,2,4
1.5” 2.0”
15
17
19
20
17
21
25
29
21
19
21
25
19
22
25
29
25
27
30
24
29
33
34
39
42
36
40
46
43
44
49
31
36
43 44
46
47
48
51
35
41
3.0”
19
20
24
26
21
24
26
29
30
33
26
31
35
40
43
38
41
46
47
49
50
49
52
39
46
VAV-PRC012-EN 95
Acoustics Data
Table 120. Sound noise criteria (NC) - fan only
Fan
08SQ
09SQ
10SQ
08SQ
ECM
09SQ
ECM
Outlet SP
0.25
0.25
0.25
0.25
0.25
CFM
1200
1400
1420
150
230
310
380
460
400
600
700
900
1020
700
800
900
700
840
980
175
250
320
400
460
(a)
470
400
500
Notes:
1. “--” represents NC levels below NC 15.
2. NC values are calculated using modeling assumptions based on AHRI 885-2008 Appendix E.
3. Application ratings are outside the scope of the certification program.
(a) AHRI 880-2011 section 7.2 Standard Rating Conditions.
l/s
179
217
189
283
670
71
109
146
330
425
481
396
463
566
661
330
378
425
330
217
222
189
236
83
118
151
189
Fan-Only
0.25” Disch. Pres.
Discharge Radiated
21
24
23
28
30
--
--
17
30
35
38
20
21
26
30
26
29
32
17
28
29
21
23
--
16
20
25
40
43
36
40
44
31
34
37
44
48
51
33
36
40
44
44
46
48
32
45
45
37
39
32
35
38
42
Table 121. Discharge sound power (dB)-fan only (AHRI conditions)
Fan Size
08SQ
09SQ
10SQ
Inlet Size
5, 6, 8
6, 8, 8x14
8, 8x14
Cfm
460
900
1420
L/s
217
425
670
Notes:
1. All sound data rated in accordance with current Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
2
68
73
72
3
62
68
69
4
63
68
66
5
62
67
65
6
58
61
60
7
56
61
57
96 VAV-PRC012-EN
Acoustics Data
Table 122. Radiated sound power (dB)-fan only (AHRI conditions)
Fan Size
08SQ
09SQ
10SQ
Inlet Size
5, 6, 8
6, 8, 8x14
8, 8x14
Cfm
460
900
1420
L/s
217
425
670
Notes:
1. All sound data rated in accordance with current Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
2
76
77
76
3
66
74
72
4
69
72
67
5
63
69
64
6
55
60
60
Table 123. Inlet attenuator appurtenance effects (fan noise only)
Fan 2
Discharge Sound Effect
(a)
(dB)
3 4 5 6
Matte-faced and foil-faced insulation
(b)
2 3 4 5 5 08SQ, 09SQ
Closed-cell insulation
08SQ, 09SQ 2 3 4 5 4
7
6
2
2
Radiated Sound Effect
3
0
4
-4
5 2 1 2
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
(b) Attenuators on double-wall units contain foil-faced insulation.
5
-8
-3
6
-7
-4
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10
-12
Watts.
Application ratings are outside the scope of the Certification Program.
7
-7
-4
7
50
53
58
Table 124. Cabinet lining appurtenance effects (fan noise and valve noise)
Fan
Solid double-wall
08SQ, 09SQ
Closed-cell insulation
2
1
Discharge Sound Effect
(a)
(dB)
3
0
4
2
5
3
6
4
7
6
2
2
3
1
4
2
08SQ, 09SQ 2 1 3 2 2 2 2 2 4
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
5
5
5
6
9
5
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10
-12
Watts.
Application ratings are outside the scope of the Certification Program.
7
13
8
Table 125. Heating coil appurtenance effects
Fan
Hot Water Coil (Fan Noise)
08SQ, 09SQ
Electric Heat
08SQ, 09SQ
2
3
0
Discharge Sound Effect
(a)
(dB)
3
3
-1
4
4
0
5
5
1
6
4
1
7
5
3
2
2
1
Radiated Sound Effect
3
2
1
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
4
3
1
5
3
2
(dB)
6
3
2
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10
-12
Watts.
Application ratings are outside the scope of the Certification Program.
7
4
3
VAV-PRC012-EN 97
Acoustics Data
Low Height Series Fan-Powered Terminal Units
Table 126. Discharge sound power (dB)
Fan
Size
Inlet
Size
(in)
08SQ 8
09SQ 8x14
10SQ 8x14
Cfm
800
890
440
700
900
1100
1300
500
350
500
700
170
250
330
410
l/s
378
420
208
330
425
519
614
227
165
236
330
80
118
156
193
0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.0” Inlet Pressure Ps
2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
61 53 54 47 44 42 60 52 49 42 38 33 61 58 50 43 39 34 61 60 52 45 41 35
64 56 57 52 49 47 63 55 54 48 44 40 64 60 55 49 45 41 64 62 55 50 46 42
68 60 61 56 53 52 67 59 58 53 49 47 68 63 59 54 50 48 68 65 59 55 51 49
71 63 64 61 57 57 71 63 63 59 55 55 72 65 63 60 56 55 72 67 63 60 56 56
74 67 67 65 61 62 75 67 67 65 61 62 76 68 67 65 61 62 76 69 67 65 61 63
63 59 55 51 45 41 64 60 59 52 45 41 65 62 59 53 47 42 66 63 59 54 48 44
67 64 60 57 51 49 67 65 63 57 51 49 69 67 63 58 53 49 71 68 63 59 54 51
71 70 66 64 59 59 72 71 67 64 59 59 75 73 67 65 60 59 77 75 69 66 61 61
75 73 68 67 62 62 75 73 69 67 62 62 76 74 69 67 63 62 78 76 71 68 64 64
77 75 70 69 65 64 77 75 71 69 65 64 78 76 71 69 65 64 79 77 72 70 66 66
60 58 54 50 43 37 62 59 54 51 44 39 64 60 57 51 46 40 66 63 58 53 47 41
63 60 57 53 47 43 64 61 57 54 48 44 66 63 59 55 49 45 69 64 65 56 51 46
65 64 60 56 50 47 67 65 61 58 53 50 69 66 62 59 53 51 71 67 66 60 55 51
69 68 64 62 57 55 71 69 65 62 57 56 72 70 66 63 58 56
73 72 68 65 61 60 74 72 68 66 61 60
08SQ
ECM
09SQ
ECM
10SQ
ECM
8
8x14
8x14
700
800
890
440
700
900
1100
1300
1500
1500
170
250
330
410
500
350
500
708
80
118
156
193
227
165
236
330
378
420
208
330
425
519
614
708
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Where Ps is the inlet static pressure minus discharge static.
4. Application ratings are outside the scope of the certification program.
75 74 70 68 64 63 76 74 70 69 64 63
61 53 54 47 44 42 60 52 49 42 38 33 61 58 50 43 39 34 61 60 52 45 41 35
64 56 57 52 49 47 63 55 54 48 44 40 64 60 55 49 45 41 64 62 55 50 46 42
68 60 61 56 53 52 67 59 58 53 49 47 68 63 59 54 50 48 68 65 59 55 51 49
71 63 64 61 57 57 71 63 63 59 55 55 72 65 63 60 56 55 72 67 63 60 56 56
74 67 67 65 61 62 75 67 67 65 61 62 76 68 67 65 61 62 76 69 67 65 61 63
63 59 55 51 45 41 64 60 59 52 45 41 65 62 59 53 47 42 66 63 59 54 48 44
67 64 60 57 51 49 67 65 63 57 51 49 69 67 63 58 53 49 71 68 63 59 54 51
71 70 66 64 59 59 72 71 67 64 59 59 75 73 67 65 60 59 77 75 69 66 61 61
75 73 68 67 62 62 75 73 69 67 62 62 76 74 69 67 63 62 78 76 71 68 64 64
77 75 70 69 65 64 77 75 71 69 65 64 78 76 71 69 65 64 79 77 72 70 66 66
60 58 54 50 43 37 62 59 54 51 44 39 64 60 57 51 46 40 66 63 58 53 47 41
63 60 57 53 47 43 64 61 57 54 48 44 66 63 59 55 49 45 69 64 65 56 51 46
65 64 60 56 50 47 67 65 61 58 53 50 69 66 62 59 53 51 71 67 66 60 55 51
69 68 64 62 57 55 71 69 65 62 57 56 72 70 66 63 58 56
73 72 68 65 61 60 74 72 68 66 61 60
75 74 70 68 64 63 76 74 70 69 64 63
98 VAV-PRC012-EN
Acoustics Data
Table 127. Radiated sound power (dB)
1,2,4
Fan
Size
Inlet
Size
(in)
0.5” Inlet Pressure
Ps
5
1.0” Inlet Pressure
Ps
5
1.5” Inlet Pressure
Ps
5
2.0” Inlet Pressure
Ps
5
3.0” Inlet Pressure
Ps
5
Cfm l/s 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5 6 7
08SQ
09SQ
10SQ
08SQ
ECM
09SQ
ECM
10SQ
ECM
8
8 x
14
8 x
14
8
8 x
14
8 x
14
170 80 54 49 45 37 28 22 55 53 47 40 33 31
250 118 57 52 48 42 33 27 58 56 50 43 36 33
330 156 60 56 52 46 37 31 61 59 54 47 39 36
410 193 63 60 56 50 41 36 64 62 57 50 42 38
58 62 55 45 41 37 58 63 58 49 46 40
60 63 56 47 42 38 60 64 59 50 46 41
63 64 58 50 43 39 63 65 60 52 46 42
65 65 59 52 44 41 65 67 62 53 46 43
500 227 66 64 60 53 44 40 67 65 60 54 45 41 68 66 61 54 46 42 68 66 61 54 45 42 68 68 63 55 46 44
350 165 58 53 47 39 32 27 59 56 56 43 37 34 62 63 61 52 45 42 64 65 62 54 49 45
500 236 62 57 51 44 36 30 63 59 57 46 39 36
700 330 68 63 56 50 40 33 68 64 58 50 42 39
65 64 62 53 46 44 67 66 63 55 50 47
69 65 62 53 47 46 71 67 64 56 51 50
800 378 70 66 58 52 44 38 70 66 59 52 44 41 70 66 61 53 46 44 71 67 63 55 48 47 72 69 65 57 52 51
890 420 72 67 59 54 46 40 72 67 60 54 46 42 73 69 64 56 49 48 74 71 67 59 53 51
440 208 61 56 49 42 33 27 62 59 52 45 40 38
700 330 62 58 51 45 37 31 64 61 55 48 43 41
65 60 60 50 46 46 66 63 61 58 50 49
68 64 62 53 48 48 70 66 67 57 52 51
900 425 66 62 55 48 41 34 68 63 56 50 44 42
1100 519 71 65 58 53 46 42
1300 614
70 66 64 55 50 50 72 68 68 58 54 52
72 68 65 57 52 52 73 70 69 60 55 54
74 69 65 58 53 52 76 72 69 61 56 55
76 70 63 59 52 48
1500 708
170 80 54 49 44 36 29 22 57 54 48 39 36 30
250 118 57 52 47 40 32 27 59 56 50 42 37 32
330 156 60 56 51 44 36 31 62 58 53 46 39 35
410 193 63 59 55 48 40 36 64 60 56 49 41 38
500 227 66 62 58 52 43 40 66 62 58 52 43 40
350 165 60 53 47 40 32 25 60 56 55 43 37 34
500 236 64 57 51 44 36 29 64 59 56 46 39 36
700 330 71 63 56 51 41 33 71 64 58 51 42 39
800 378 73 66 58 53 44 38 73 66 59 53 44 40
890 420 75 67 59 55 46 40 75 67 60 55 46 41
440 208 61 54 47 42 37 32 62 57 49 44 38 38
700 330 64 57 50 45 37 32 66 60 54 49 43 43
900 425 65 62 55 48 40 35 69 63 56 52 44 43
1100 519
1300 614
72 66 58 54 46 43
1500 708
76 71 64 60 54 52 78 74 70 63 58 57
57 60 54 44 41 36 58 61 56 48 45 40
59 62 56 46 42 38 60 63 58 50 46 41
62 64 58 49 44 40 63 66 61 52 47 42
65 66 60 52 45 42 66 68 63 54 48 44
67 67 61 54 46 43 68 70 65 56 49 45
63 63 62 52 45 42 64 63 62 54 49 47
67 64 63 53 46 44 68 65 63 55 50 48
71 65 63 53 47 46 73 68 64 57 51 49
73 67 63 55 48 46 75 69 64 58 52 49
75 69 63 56 49 47 77 70 65 59 53 50
64 59 60 48 44 44 68 63 68 56 48 51
69 64 60 53 47 49 71 66 68 56 51 51
72 67 61 55 50 51 73 68 68 58 52 52
74 70 62 57 52 53 75 71 67 60 54 54
76 71 63 59 53 53 77 72 67 61 56 55
78 72 65 61 54 52 79 74 68 63 58 57
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts.
3. Data in this column constitute AHRI 880-2011 Standard Rating Conditions.
4. Where Ps is the inlet static pressure minus discharge static.
5. Application ratings are outside the scope of the certification program.
VAV-PRC012-EN 99
Acoustics Data
Table 128. Fan only sound power (dB) l/s
80
330
425
519
614
708
330
378
420
208
193
227
165
236
708
80
118
156
425
519
614
661
378
420
208
330
236
165
236
330
118
156
193
227
Fan
08SQ
09SQ
10SQ
08SQ
ECM
09SQ
ECM
10SQ
ECM
Outlet
SP
0.25
0.25
0.25
0.25
0.25
0.25
CFM
170
700
800
890
440
700
900
1100
1300
1500
1500
170
250
330
410
480
350
500
250
330
410
480
500
(a)
350
500
700
800
890
440
700
900
1100
1300
1400
Notes:
1. All data are measured in accordance with Industry Standard AHRI 880-2011.
2. All sound power levels, dB re: 10
-12
Watts
3. Application ratings are outside the scope of the certification program
(a) AHRI 880-2011 section 7.2 Standard Rating Conditions
2
61
65
67
69
72
75
73
77
80
62
71
74
64
69
73
60
63
67
65
68
71
72
77
79
61
63
73
65
69
74
63
67
70
73
62
64
67
70
73
71
74
78
59
62
65
60
65
73
48
52
57
64
67
70
71
70
73
58
61
65
58
62
68
54
58
61
64
3
51
Discharge Lw (dB)
Octave Bands
4
52
5
46
6
42
61
63
66
68
70
67
71
74
58
63
67
57
62
69
47
53
59
61
64
66
68
69
71
54
58
67
55
60
66
55
59
64
66
58
61
64
67
70
67
70
74
55
59
64
53
60
69
42
48
53
59
62
66
68
67
70
51
56
63
51
57
64
50
54
58
62
52
55
58
62
65
62
66
70
49
56
61
48
55
64
36
44
50
53
57
61
62
62
65
44
49
60
46
52
59
46
50
56
60
2
53
65
67
70
73
75
69
72
76
62
61
66
60
64
74
53
55
58
66
68
71
72
68
70
62
64
64
57
61
66
56
59
60
63
7
38
51
54
58
62
65
61
65
69
48
54
59
46
54
63
30
38
47
51
55
59
61
61
64
38
45
60
41
49
58
43
49
56
59
Radiated Lw (dB)
Octave Bands
4
44
5
36
6
26
52
55
58
61
63
56
59
62
48
54
57
45
50
62
41
45
50
54
57
60
61
58
60
48
51
59
44
48
55
48
52
55
58
46
50
54
57
59
51
54
57
41
49
53
39
44
58
36
40
44
48
52
55
56
52
55
41
45
54
38
42
49
41
46
49
53
35
39
42
46
49
40
44
48
30
38
43
28
34
48
25
28
33
36
40
44
46
42
45
29
33
45
24
30
38
30
36
40
44
3
47
59
62
66
69
71
63
66
70
55
58
61
53
58
69
46
50
54
62
64
66
68
64
67
57
60
62
51
55
61
51
56
59
62
7
21
27
30
33
36
40
33
36
40
23
33
37
23
28
36
23
25
28
26
30
33
35
32
36
22
24
38
20
23
29
23
27
34
37
100 VAV-PRC012-EN
Acoustics Data
Table 129. Sound noise criteria (NC) - fan and 100% primary
Fan
Size
08SQ
09SQ
10SQ
Inlet
Size
(in)
8
8x14
8x14
l/s
378
420
208
330
425
519
614
80
118
156
193
227
165
236
330
CFM
800
890
440
700
900
1100
1300
170
250
330
410
480
350
500
700
0.5”
Discharge
Inlet Pressure (Ps)
1.0” 2.0” 3.0”
29
16
22
29
--
17
22
26
32
35
--
17
22
32
35
16
18
23
26
31
17
23
30
--
15
20
26
24
27
31
33
36
17
20
32
19
25
32
15.6
18
22
27
25
29
31
36
37
20
22
32
20
26
35
18.0
20
24
27
0.5”
Radiated
Inlet Pressure (Ps)
1.0” 2.0” 3.0”
35
21
26
33
18.7
22
26
31
37
38
25
27
32
37
38
28
31
33
36
36
31
32
34
21.4
25
28
32
39
40
40
38
40
35
37
37
36
37
37
32.0
33
34
36
44
45
45
40
43
36
43
39
37
38
39
33.2
34
36
38
08SQ
ECM
09SQ
ECM
10SQ
ECM
8
8x14
8x14
700
800
890
440
700
900
1100
1300
1500
1500
170
250
330
410
480
350
500
708
80
118
156
193
227
165
236
330
378
420
208
330
425
519
614
708
--
17
22
26
29
16
22
29
32
35
--
17
22
--
15
20
26
31
17
23
30
32
35
16
18
23
26
33
16
18
22
27
32
19
25
32
33
36
17
20
24
27
31
33
33
18
20
24
27
32
20
26
35
36
37
20
22
25
29
31
33
18
21
25
30
33
22
27
36
39
42
24
27
32
23
25
27
31
33
30
31
36
39
42
26
30
34
38
Notes:
1. “--” represents NC levels below NC 15.
2. NC Values are calculated using modeling assumptions based on AHRI 885-98-02 Addendum
3. Where Ps is the inlet static pressure minus discharge static.
4. Data at 0.5”, 1.0”, 2.0” and 3.0” are application ratings. These ratings are outside the scope of the certification program.
35
38
42
43
45
38
39
42
35
37
38
37
38
43
30
32
34
44
44
43
44
47
39
42
44
44
39
42
37
38
46
31
33
37
Table 130.AHRI 885-2008 add discharge transfer function assumptions:
2 3
Octave Band
4 5 6 7
Small Box (< 300 CFM)
Medium Box (300-700 CFM)
Large Box (> 700 CFM)
-24
-27
-29
-28
-29
-30
-39
-40
-41
-53
-51
-51
-59
-53
-52
-40
-39
-39
Notes:
Subtract from terminal unit sound power to determine discharge sound pressure in the space.
1. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2Mineral Fiber
Insulation.
2. Application ratings are outside the scope of the Certification Program.
VAV-PRC012-EN 101
Acoustics Data
Table 131. AHRI 885-2008 radiated transfer function assumptions:
2 3
Octave Band
4 5 6 7
Type 2- Mineral Fiber Insulation
Total dB reduction
-18
-18
-19
-19
-20
-20
-26
-26
-31
-31
-36
-36
Notes:
Subtract from terminal unit sound power to determine radiated sound pressure in the space.
1. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2Mineral Fiber
Insulation.
2. Application ratings are outside the scope of the Certification Program.
Table 132. Inlet attenuator appurtenance effects
Fan 2
Discharge Sound Effect
(a)
(dB)
3 4
Matte-faced and foil-faced insulation, solid double-wall
(b)
5 6 7
08SQ, 09SQ
10SQ
Closed-cell insulation
0
2
0
2
0
2
1
2
0
2
0
2
2
-1
-2
Radiated Sound Effect
3
-3
-3
4
-3
-5
08SQ, 09SQ
10SQ
0
2
1
2
0
2
0
2
0
2
0
2
-1
-1
-1
-1
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
(b) Attenuators on double-wall units have 1" foil-faced insulation. All edges are encapsulated with metal.
-1
-2
5
-7
-10
-4
-5
6
-7
-12
-6
-9
7
-6
-12
-4
-9
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10-12 Watts.
Application ratings are outside the scope of the Certification Program.
Table 133. Cabinet lining appurtenance effects
Fan
Solid double-wall
08SQ, 09SQ
10SQ
Closed-cell insulation
Discharge Sound Effect
(a)
(dB)
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
7
0
0
2
-1
1
Radiated Sound Effect
3
-2
0
4
08SQ, 09SQ
10SQ
0
0
0
0
0
0
0
0
0
0
0
0
2
2
3
3
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
6
4
2
2
5
11
9
7
7
6
8
6
17
14
7
19
16
12
11
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10-12 Watts.
Application ratings are outside the scope of the Certification Program.
Table 134. Heating coil appurtenance effects
Fan
Hot Water Coil
(b)
08SQ, 09SQ
10SQ
2
1
1
Discharge Sound Effect
(a)
(dB)
3
1
2
4
1
2
5
1
1
6
2
2
7
1
1
2
1
1
3
2
1
08SQ, 09SQ
10SQ
-1
1
-2
0
-1
-1
-1
-1
-1
-1
-1
0
-3
2
-1
4
(a) Add to sound power, a negative effect represents a sound reduction, a positive effect represents a sound increase.
(b) Radiated effect applies to “fan only” sound only. Do not apply to fan + valve sound.
4
1
3
2
1
5
1
4
3
2
6
7
6
7
4
7
12
8
7
9
All data are measured in accordance with Industry Standard AHRI 880-2011.
All sound power levels, dB re: 10-12 Watts.
Application ratings are outside the scope of the Certification Program.
102 VAV-PRC012-EN
Dimensional Data
Parallel Fan-Powered Terminal Units
PARALLEL COOLING ONLY (VPCF)
FAN
SIZE
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
INLET SIZE
AVAILABILITY
(NOMINAL Ø")
5", 6", 8", 10"
6", 8", 10", 12"
8", 10", 12", 14"
10", 12", 14"
10", 12", 14", 16"
10", 12", 14", 16"
INLET SIZE
AVAILABILITY
(NOMINAL Ømm)
127 mm, 152 mm, 203 mm, 254 mm
152 mm, 203 mm, 254 mm, 305 mm
203 mm, 254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm, 406 mm
254 mm, 305 mm, 356 mm, 406 mm
H
15.50" (394 mm)
17.50" (445 mm)
21.50" (546 mm)
W
40.00" (1016 mm)
L
30.00" (762 mm)
32.50" (826 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
A
19.25" (489 mm)
B
14.00" (356 mm)
16.00" (406 mm)
20.00" (508 mm)
UNIT WT
WT LBS
(kg)
78 (35)
96 (43)
97 (44)
111 (50)
117 (53)
125 (57)
4.
Optional Attenuator
Field Installed
9.
Actuator, Controller and
Fan Controls located in this area
2.
9.
Actuator, Controller and
Fan Controls located in this area
40.00"
(1016 mm)
Airflow
Plenum Inlet
(Valves 5"-14")
(Valve 16")
4.00"
(102 mm)
2.00"
(51 mm)
Flow Ring tubing
20.00"
(508 mm)
Primary
Airflow
Valve 5"
6.50"
(165 mm)
Air
Valve
4.00"
(102 mm)
18.875" Max.
(479 mm)
9.
5.50" Max.
(140 mm)
B
11.30" Max.
(287 mm)
9.
Airflow
Discharge Outlet
A
W back draft damper
Optional Attenuator
Field Installed
L
5.
Panel slides for Motor access
TOP VIEW
5.
20.00"
(508 mm)
DISCHARGE VIEW
30.00"
(762 mm)
H
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 20" x 1"
(356 mm x 508 mm x 25 mm)
Attn. Weight
Wt Lbs
(kg)
46 (21)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
48 (22)
54 (25)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet
clearance for unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. See Installation Documents for exact hanger bracket location.
5. For Motor access, remove bottom screw on hanger brackets
to slide panel as shown in drawing.
6. When Attenuator option selected, water coil ships mounted
to attenuator.
7. Air valve centered between top and bottom panel.
8. All high & low voltage controls have same-side NEC
jumpback clearance. (Left-hand shown, right-hand/mirror
image optional.)
9. Maximum dimensions for controls area shown. Configurations
and types of control boxes vary according to control type
selected. See "Enclosure Details" for specific layout.
10. Graphic shown is for left-hand electrical. Right-hand electrical
is a mirror image.
VAV-PRC012-EN 103
Dimensional Data
PARALLEL HOT WATER (VPWF)
FAN
SIZE
INLET SIZE
AVAILABILITY
(NOMINAL Ø")
02SQ
5", 6", 8", 10"
03SQ
04SQ
05SQ
6", 8", 10", 12"
8", 10", 12", 14"
10", 12", 14"
06SQ
07SQ
10", 12", 14", 16"
10", 12", 14", 16"
INLET SIZE
AVAILABILITY
(NOMINAL Ømm)
127 mm, 152 mm, 203 mm, 254 mm
152 mm, 203 mm, 254 mm, 305 mm
203 mm, 254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm, 406 mm
254 mm, 305 mm, 356 mm, 406 mm
H
W
15.50" (394 mm)
17.50" (445 mm)
40.00" (1016 mm)
21.50" (546 mm)
L
30.00" (762 mm)
32.50" (826 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
A
19.25" (489 mm)
B
UNIT WT
WT LBS
(kg)
14.00" (356 mm)
78 (35)
16.00" (406 mm)
96 (43)
97 (44)
111 (50)
20.00" (508 mm) 117 (53)
125 (57)
4.
Optional Attenuator
Field Installed
104
9.
Actuator, Controller and
Fan Controls located in this area
(Valves 6"-14")
(Valve 16")
4.00"
(102 mm)
2.00"
(51 mm)
Flow Ring tubing
18.875" Max.
(479 mm)
9.
5.50" Max.
(140 mm)
B
11.30" Max.
(287 mm)
2.
40.00"
(1016 mm)
20.00"
(508 mm)
Water
Coil
Airflow
Plenum Inlet
Coil
Connection
6.30"
(160 mm)
9.
Actuator, Controller and
Fan Controls located in this area
20.00"
(508 mm)
Primary
Airflow
Valve 5"
6.50"
(165 mm)
Air
Valve
4.00"
(102 mm)
Airflow
Discharge Outlet
W back draft damper
Optional Attenuator
Field Installed
L
5.
Panel slides for Motor access
TOP VIEW
5.
20.00"
(508 mm)
30.00"
(762 mm)
H
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 20" x 1"
(356 mm x 508 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
Attn. Weight
Wt Lbs
(kg)
46 (21)
48 (22)
54 (25)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance
for unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. See Installation Documents for exact hanger bracket location.
5. For Motor access, remove bottom screw on hanger
brackets to slide panel as shown in drawing.
6. When Attenuator option selected, water coil ships
mounted to attenuator.
7. Air valve centered between top and bottom panel.
8. All high & low voltage controls have same-side NEC
jumpback clearance. (Left-hand shown, right-hand/mirror
image optional.)
9. Maximum dimensions for controls area shown.
9.
A
DISCHARGE VIEW
VAV-PRC012-EN
Dimensional Data
PARALLEL WITH HOT WATER ON DISCHARGE (VPWF)
FAN
SIZE
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
INLET SIZE
AVAILABILITY
(NOMINAL Ø")
5", 6", 8", 10"
6", 8", 10", 12"
8", 10", 12", 14"
10", 12", 14"
10", 12", 14", 16"
10", 12", 14", 16"
INLET SIZE
AVAILABILITY
(NOMINAL Ømm)
127 mm, 152 mm, 203 mm, 254 mm
152 mm, 203 mm, 254 mm, 305 mm
203 mm, 254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm, 406 mm
254 mm, 305 mm, 356 mm, 406 mm
H
15.50" (394 mm)
17.50" (445 mm)
21.50" (546 mm)
W
40.00" (1016 mm)
L
30.00" (762 mm)
32.50" (826 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
A
20.00" (508 mm)
B
14.00" (356 mm)
16.00" (406 mm)
20.00" (508 mm)
UNIT WT
(kg)
78 (35)
96 (43)
97 (44)
111 (50)
117 (53)
125 (57)
4.
Optional Attenuator
Field Installed
8.
Actuator, Controller and
Fan Controls located in this area
2.
40.00"
(1016 mm)
Airflow
Plenum Inlet
8.
Actuator, Controller and
Fan Controls located in this area
(Valves 5"-14")
(Valve 16")
4.00"
(102 mm)
2.00"
(51 mm)
Flow Ring tubing
20.00"
(508 mm)
Primary
Airflow
Valve 5"
6.50"
(165 mm)
Air
Valve
4.00"
(102 mm)
18.875" Max.
(479 mm)
8.
5.50" Max.
(140 mm)
6.30"
(160 mm)
Airflow
Discharge Outlet
Water
Coil
20.00"
(508 mm)
W
B
11.30" Max.
(287 mm)
8.
A
VAV-PRC012-EN
30.00"
(762 mm)
Optional Attenuator
Field Installed
L
5.
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 20" x 1"
(356 mm x 508 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
Attn. Weight
Wt. Lbs.
(kg)
46 (21)
48 (22)
54 (25)
Panel slides for Motor access
TOP VIEW
5.
20.00"
(508 mm)
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet
clearance for unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. See Installation Documents for exact hanger bracket location.
5. For Motor access, remove bottom screw on hanger brackets
to slide panel as shown in drawing.
6. Air valve centered between top and bottom panel.
7. All high & low voltage controls have same-side NEC
jumpback clearance. (Left-hand shown, right-hand/mirror
image optional.)
8. Maximum dimensions for controls area shown.
DISCHARGE VIEW
105
Dimensional Data
106 VAV-PRC012-EN
Dimensional Data
VAV-PRC012-EN 107
Dimensional Data
PARALLEL ELECTRIC HEAT (VPEF)
FAN
SIZE
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
INLET SIZE
AVAILABILITY
(NOMINAL Ø")
5", 6", 8", 10"
6", 8", 10", 12"
8", 10", 12", 14"
10", 12", 14"
10", 12", 14", 16"
10", 12", 14", 16"
INLET SIZE
AVAILABILITY
(NOMINAL Ømm)
127 mm, 152 mm, 203 mm, 254 mm
152 mm, 203 mm, 254 mm, 305 mm
203 mm, 254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm
254 mm, 305 mm, 356 mm, 406 mm
254 mm, 305 mm, 356 mm, 406 mm
H
15.50" (394 mm)
17.50" (445 mm)
21.50" (546 mm)
W
40.00" (1016 mm)
L
30.00" (762 mm)
32.50" (826 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
A
20.00" (508 mm)
B
14.00" (356 mm)
16.00" (406 mm)
20.00" (508 mm)
UNIT WT
WT LBS
(kg)
120 (54)
96 (43)
138 (63)
141 (64)
178 (80)
186 (84)
5.
Optional Attenuator
Field Installed
108
9.
Actuator, Controller and
Fan Controls located in this area
18.875" Max.
(479 mm)
9.
4.00"
(102 mm)
Flow Ring tubing
20.00"
(508 mm)
Primary
Airflow
Valve 5"
6.50"
(165 mm)
Air
Valve
4.00"
(102 mm)
22.00"
(559 mm)
5.50" Max.
(140 mm)
B
11.30" Max.
(287 mm)
9.
2.
9.
Actuator, Controller and
Fan Controls located in this area
40.00"
(1016 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
30.00"
(762 mm)
L
4.
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 20" x 1"
(356 mm x 508 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
Attn. Weight
Wt. Lbs.
(kg)
46 (21)
48 (22)
54 (25)
Heater
Airflow
Discharge Outlet
W
6.00"
(152 mm)
4.
Panel slides for Motor access
TOP VIEW
20.00"
(508 mm)
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Filter location with optional Attenuator.
3. Attenuatory factory assembled, field installed.
4. For motor access, remove bottom screws on hanger brackets
to slide panel as shown in drawing.
5. See Installation Documents for exact hanger bracket location.
6. Air valve centered between top and bottom panel.
7. Heating coil uninsulated. External insulation may be field
supplied and installed as required.
8. All high & low voltage controls have same side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
Maximum dimensions for controls area shown.
and types of control boxes vary according to control type
selected. See "Enclosure Details" for specific layout.
A
DISCHARGE VIEW
VAV-PRC012-EN
Dimensional Data
Series Fan-Powered Terminal Units
SERIES COOLING ONLY (VSCF) WITHOUT ATTENUATOR
FAN
SIZE
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø
INCHES
4, 5, 6, 8, 10
6, 8, 10, 12
6, 8, 10, 12, 14
10, 12, 14
10, 12, 14, 16
10, 12, 14, 16
INLET SIZE
AVAILABILITY
NOMINAL Ø
(mm)
104, 127, 152, 203, 254
152, 203, 254, 305
152, 203, 254, 305, 356
254, 305, 356
254, 305, 356, 406
254, 305, 356, 406
H
15.50" (394 mm)
17.50" (445 mm)
21.50" (546 mm)
W L
DISCHARGE DIMENSIONS
A B
C D
Unit Wt
Lbs
(kg)
22.00" (559 mm)
24.00" (610 mm)
30.00" (762 mm)
34.00" (864 mm)
40.00" (1016 mm)
12.00" (305 mm)
19.00" (483 mm)
14.00" (356 mm)
16.00" (406 mm)
24.00" (610 mm)
18.00" (457 mm)
5.00" (127 mm)
2.50" (64 mm)
3.00" (76 mm)
.65" (17 mm)
.75" (19 mm)
78 (35)
85 (39)
86 (39)
1.66" (42 mm)
100 (45)
117 (53)
125 (57)
2.
7.
Airflow
Plenum Inlet
TOP VIEW
Filter
5.50" Max.
(140 mm)
11.30" Max.
(287 mm)
7.
(Valves 4"-14")
4.00"
(102 mm)
Flow Ring
Tubing
W
Primary
Airflow
Air
Valve
Valves 4" & 5"
6.50"
(165 mm)
4.00"
(102 mm)
18.875" Max.
(479 mm)
7.
Actuator, Controller and
Fan Controls located in this area
L
Airflow
Discharge Outlet
Panel slides for Motor access
B
H
D
4.
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 14" x 1"
(356 mm x 356 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. See Installation Documents for exact hanger bracket location.
3. Air valve centered between top and bottom panel.
4. For motor access, remove bottom screw on hanger brackets
to slide panel as shown in drawing.
5. Attenuator option not available with this unit layout.
6. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
types of control boxes vary according to control types selected.
A C
DISCHARGE VIEW
VAV-PRC012-EN 109
Dimensional Data
110 VAV-PRC012-EN
Dimensional Data
NARROW CORRIDOR DESIGN SERIES COOLING (VSCF) WITHOUT ATTENUATOR
VAV-PRC012-EN
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet
clearance for unducted installations.
2. See installation Documents for exact hanger bracket location.
3. Air valve centered between top and bottom panel.
4. For Motor access, remove bottom screw on hanger
brackets to slide panel as shown in drawing.
5. Attenuator option not available with this unit layout.
6. All high & low voltage controls have same-side NEC
jumpback clearance. (unit shown w/left hand high &
low voltage box connections [high voltage inlet facing].
Right hand connections available.)
7. Maximum dimensions for controls are shown.
111
Dimensional Data
112 VAV-PRC012-EN
Dimensional Data
SERIES HOT WATER (VSWF) WITHOUT ATTENUATOR
FAN
SIZE
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø
INCHES
4, 5, 6, 8, 10
6, 8, 10, 12
6, 8, 10, 12, 14
10, 12, 14
10, 12, 14, 16
10, 12, 14, 16
INLET SIZE
AVAILABILITY
NOMINAL Ø
(mm)
104, 127, 152, 203, 254
152, 203, 254, 305
152, 203, 254, 305, 356
254, 305, 356
254, 305, 356, 406
254, 305, 356, 406
H W L
DISCHARGE DIMENSIONS
A
B
C D E
Unit Wt
Lbs
(kg)
15.50" (394 mm)
17.50" (445 mm)
22.00" (559 mm)
24.00" (610 mm)
21.50" (546 mm)
30.00" (762 mm)
34.00" (864 mm)
40.00" (1016 mm)
12.00" (305 mm)
19.00" (483 mm)
24.00" (610 mm)
14.00" (356 mm)
16.00" (406 mm)
5.00" (127 mm)
2.50" (64 mm)
18.00" (457 mm)
3.00" (76 mm)
.65" (17 mm)
.75" (19 mm)
1.66" (42 mm)
6.75" (171 mm)
10.75" (273 mm)
6.75" (171 mm)
78 (35)
85 (39)
86 (39)
100 (45)
117 (53)
125 (57)
2.
W
(Valves 4"-14")
4.00"
(102 mm)
2.00"
(Valve 16") (51 mm)
Flow Ring
Tubing
Primary
Airflow
Air
Valve
Valves 4" & 5"
6.50"
(165 mm)
4.00"
(102 mm)
18.875" Max.
(479 mm)
9.
Actuator, Controller and
Fan Controls located in this area
L
9.
Airflow
Plenum Inlet
4.
Filter
3.00" x 7.00"
(76 mm x 178 mm)
Coil Access
Coil Connection
TOP VIEW
5.50" Max.
(140 mm)
11.30" Max.
(287 mm)
9.
Water Coil
Airflow
Discharge Outlet
Panel slides for Motor access
E
B
H
D
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 14" x 1"
(356 mm x 356 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. See Installation Documents for exact hanger bracket location.
3. Air valve centered between top and bottom panel.
4. For motor access, remove bottom screw on hanger brackets
to slide panel as shown in drawing.
5. Attenuator option not available with this unit layout.
6. Heating coil uninsulated. External insulation may be field-
supplied and installed as required.
7. Rotate coil 180 for right-hand coil connection.
8. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
Maximum dimensions for controls area shown.
types of control boxes vary according to control types selected. See
"Enclosure Details" for specific layout.
A
C
DISCHARGE VIEW
VAV-PRC012-EN 113
Dimensional Data
114 VAV-PRC012-EN
Dimensional Data
NARROW CORRIDOR DESIGN SERIES HOT WATER (VSWF) WITHOUT ATTENUATOR
VAV-PRC012-EN
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet
clearance for unducted installations.
2. See Installation Documents for exact hanger
bracket location.
3. Air valve centered between top and bottom panel.
4. For motor access, remove bottom screw on
hanger brackets to slide panel as shown in drawing.
5. Attenuator option not available with this unit layout.
6. Heating coil un-insulated. External insulation may be
field supplied and installed as required.
7. Rotate coil 180° for right hand coil connection.
8. All high & low voltage controls have same-side NEC
jumpback clearance. (unit shown w/left hand high &
low voltage box connections [high voltage inlet facing].
Right hand connections available.)
9. Maximum dimensions for controls area shown.
115
Dimensional Data
116 VAV-PRC012-EN
COIL INFORMATION FOR SERIES 1-ROW COIL
Dimensional Data
VAV-PRC012-EN 117
Dimensional Data
COIL INFORMATION FOR SERIES 2-ROW COILS
118 VAV-PRC012-EN
Dimensional Data
SERIES ELECTRIC (VSEF) WITHOUT ATTENUATOR
FAN
SIZE
INLET SIZE
AVAILABILITY
NOMINAL Ø
INCHES
4, 5, 6, 8, 10 02SQ
03SQ
04SQ
05SQ
6, 8, 10, 12
6, 8, 10, 12, 14
10, 12, 14
06SQ 10, 12, 14, 16
07SQ
10, 12, 14, 16
INLET SIZE
AVAILABILITY
NOMINAL Ø
(mm)
104, 127, 152, 203, 254
152, 203, 254, 305
152, 203, 254, 305, 356
254, 305, 356
254, 305, 356, 406
254, 305, 356, 406
H
15.50" (394 mm)
17.50" (445 mm)
21.50" (546 mm)
W
30.00" (762 mm)
L
22.00" (559 mm)
24.00" (610 mm)
34.00" (864 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
A
B
C
D
12.00" (305 mm) 10.00" (254 mm)
12.00" (305 mm)
16.00" (406 mm)
19.00" (483 mm)
14.00" (356 mm)
5.00" (127 mm)
4.00" (102 mm)
18.00" (457 mm)
4.00" (102 mm) 22.00" (559 mm)
10.00" (254 mm)
5.50" (140 mm)
25.00" (635 mm)
E
18.50" (470 mm)
17.00" (432 mm)
Unit Wt
Lbs
(kg)
78 (35)
85 (39)
86 (39)
100 (45)
117 (53)
125 (57)
2.
W
(Valves 4"-14")
(Valve 16")
4.00"
(102 mm)
2.00"
(51 mm)
Flow Ring
Tubing
Primary
Airflow
Air
Valve
Valves 4" & 5"
6.50"
(165 mm)
4.00"
(102 mm)
18.875" Max.
(479 mm)
8.
Airflow
Plenum Inlet
Fans
02SQ
Fans
03SQ–05SQ
Fans
06SQ–07SQ
Filter
1.00"
(25 mm)
2.00"
(51 mm)
0.60"
(15 mm)
TOP VIEW
E
6.20"
(157 mm)
5.50" Max.
(140 mm)
11.30" Max.
(287 mm)
8.
DISCHARGE VIEW
Electric
Heater
Airflow
Discharge Outlet
D
A
Panel slides for Motor access
L
8.
Actuator, Controller and
Fan Controls located in this area
4.
Fan Size
02SQ
03SQ
04SQ
05SQ
06SQ
07SQ
Filter Size
14" x 14" x 1"
(356 mm x 356 mm x 25 mm)
16" x 20" x 1"
(406 mm x 508 mm x 25 mm)
20" x 20" x 1"
(508 mm x 508 mm x 25 mm)
C
B
Fans
02SQ
Fans
03SQ–05SQ
Fans
06SQ–07SQ
1.50"
(38 mm)
1.50"
(38 mm)
3.00"
(76 mm)
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. See Installation Documents for exact hanger bracket location.
3. Air valve centered between top and bottom panel.
4. For motor access, remove bottom screw on hanger brackets
to slide panel as shown in drawing.
5. Attenuator option not available with this unit layout.
6. Heating coil uninsulated. External insulation may be field-
supplied and installed as required.
7. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
Maximum dimensions for controls area shown.
types of control boxes vary according to control types selected. See
"Enclosure Details" for specific layout.
VAV-PRC012-EN 119
Dimensional Data
120 VAV-PRC012-EN
Dimensional Data
VAV-PRC012-EN 121
Dimensional Data
122 VAV-PRC012-EN
Dimensional Data
Low Height Parallel Fan-Powered Terminal Units
LOW-HEIGHT PARALLEL COOLING (LPCF) FAN SIZES 08SQ & 09SQ
FAN
INLET SIZE
AVAILABILITY
SIZE NOMINAL Ø (INCHES)
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
08SQ
09SQ
5, 6, 8
6, 8
127, 152, 203
152, 203
DISCHARGE DIMENSIONS
H W L
A
11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm) 19.25" (489 mm)
B
9.5" (241 mm)
09SQ
8 x 14 203 x 356
D
4.00" (102 mm)
3.25" (83 mm)
UNIT WT
WT LBS
(kg)
69 (31.3)
74 (33.6)
83 (37.7)
Optional Attenuator
Field Installed
17.50"
(445 mm)
5.00"
(127 mm)
H
10.50"
(267 mm)
5.
Actuator, Controller and
Fan Controls located in this area
5.
Actuator, Controller and
Fan Controls located in this area
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.00
(102 mm)
Airflow
Discharge Outlet
A
W
32.00"
(813 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
18.00"
(457 mm)
Rectangular Damper
8" x 14"
(203 mm X 356 mm)
Rectangular Damper Detail
5.
Actuator, Controller and
Fan Controls located in Enclosure
7.
L
Fan Size
08SQ
09SQ
Filter Size
10" x 20" x 1"
(254 mm x 508 mm x 25 mm)
Attn Wt
Wt. Lbs.
(kg)
10 (4.5)
TOP VIEW
B
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted
installations.
2. Flanged discharge outlet accepts up to 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Air valve centered between top and bottom panel.
5. Control box enclosure provided with all control types.
6. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
7. Flange adds 2" to width and length of unit.
DISCHARGE VIEW
VAV-PRC012-EN 123
Dimensional Data
LOW-HEIGHT PARALLEL COOLING (LPCF) FAN SIZE 10SQ
FAN
SIZE
10SQ
10SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
8
8 x 14
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
203
203 x 356
H W
11.50" (292 mm)
40.00" (1016 mm)
DISCHARGE DIMENSIONS
L
A
B
50.00" (1270 mm) 19.25" (489 mm)
10.00" (254 mm)
D
4.00" (102 mm)
3.25" (83 mm)
UNIT WT
WT LBS
(kg)
90 (41)
92 (42)
4.
124
Flow Ring tubing
20.00"
(508 mm)
D
Primary
Airflow
Air
Valve
4.00
(102 mm)
18.875" Max.
(479 mm)
20.00"
(508 mm)
L
6.
Actuator, Controller and
Fan Controls located in this area
4.
Rectangular Damper
8" x 14"
(203 mm X 356 mm)
Rectangular Damper Detail
6.
Actuator, Controller and
Fan Controls located in this area
6.
5.50" Max.
(140 mm)
B
11.30" Max.
(287 mm)
6.
Airflow
Discharge Outlet
W
TOP VIEW
Fan Size
10SQ
Filter Size
10" x 20" x 1"
(254 mm x 508 mm x 25 mm)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. See Installation Documents for exact hanger bracket location.
5. Air valve centered between top and bottom panel.
6. Maximum dimensions for controls area shown.
H
A
DISCHARGE VIEW
VAV-PRC012-EN
Dimensional Data
LOW-HEIGHT PARALLEL HOT WATER (LPWF) FAN SIZES 08SQ & 09SQ
FAN
SIZE
INLET SIZE
AVAILABILITY
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES) NOMINAL Ø (mm)
08SQ
09SQ
09SQ
5, 6, 8
6, 8
8 x 14
127, 152, 203
152, 203
203 x 356
H W
11.00" (279 mm) 40.00" (1016 mm)
DISCHARGE DIMENSIONS
L
30.00" (762 mm)
A
B
19.25" (483 mm) 9.50" (241 mm)
D
UNIT WT
WT LBS
(kg)
4.00" (102 mm) 98 (44.5)
103 (46.7)
3.25" (83 mm) 112 (50.8)
Optional Attenuator
Field Installed
17.50"
(445 mm)
5.00"
(127 mm)
5.
Actuator, Controller and
Fan Controls located in this area
5.
Actuator, Controller and
Fan Controls located in this area
32.00"
(813 mm)
20.00"
(508 mm)
6.80"
(173 mm)
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.00
(102 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
18.00"
(457 mm)
7.
L
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
Rectangular Damper Detail
5.
Actuator, Controller and
Fan Controls located in Enclosure
Fan Size
08SQ
09SQ
Filter Size
10" x 20" x 1"
(254 mm x 508 mm x 25 mm)
Attn Wt
Wt Lbs
(kg)
10 (4.5)
H
10.50"
(267 mm)
Airflow
Discharge Outlet
W
B
TOP VIEW
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Air valve centered between top and bottom panel.
5. Control box enclosure provided with all control types.
6. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
7. Flange adds 2" to width and length of unit.
A
DISCHARGE VIEW
VAV-PRC012-EN 125
Dimensional Data
126 VAV-PRC012-EN
Dimensional Data
PARALLEL LOW-HEIGHT HOT WATER (LPWF) COIL ON DISCHARGE
FAN SIZES 08SQ & 09SQ
FAN
SIZE
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
H W L
DISCHARGE DIMENSIONS
08SQ
09SQ
09SQ
5, 6, 8
6, 8
8 X 14
127, 152, 203
152, 203
203 X 356
11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm)
A
20.00" (508 mm)
B
10.00" (254 mm)
D
UNIT WT
WT LBS
(kg)
4.00" (102 mm) 98 (44.5)
103 (46.7)
3.25" (83 mm) 112 (50.8)
Optional Attenuator
Field Installed
5.
Actuator, Controller and
Fan Controls located in this area 5.
Actuator, Controller and
Fan Controls located in this area
17.50"
(445 mm)
5.00"
(127 mm)
32.00"
(813 mm)
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.00
(102 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
18.00"
(457 mm)
7.
L
Rectangular Damper
8" x 14"
(203 mm X 356 mm)
Rectangular Damper Detail
5.
Actuator, Controller and
Fan Controls located in Enclosure
Fan Size
08SQ
09SQ
Filter Size
10" x 20" x 1"
(254 mm x 508 mm x 25 mm)
Attn Wt
Wt Lbs
(kg)
10 (4.5)
H
10.50"
(267 mm)
6.80"
(173 mm)
20.00"
(508 mm)
Airflow
Discharge Outlet
W
A
B
TOP VIEW
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Air valve centered between top and bottom panel.
5. Control box enclosure provided with all control types.
6. All high & low voltage controls have same-side NEC jumpback clearance.
(Left-hand shown, right-hand/mirror image optional.)
7. Flange adds 2" to width and length of unit.
DISCHARGE VIEW
VAV-PRC012-EN 127
Dimensional Data
Coil Information For Low Height Parallel Inlet-1 Row
Size Inlet/Fan
08SQ
09SQ
10SQ
Coil Connection 1-Row
3/8" (10 mm) O.D.
3/8" (10 mm) O.D.
.375" (10 mm) O.D.
A
9" (229 mm)
9" (229 mm)
9.00" (229 mm)
B
2 7/8" (71 mm)
2 7/8" (71 mm)
2.80" (71 mm)
L
20" (508 mm)
20" (508 mm)
20.00" (508 mm)
H
10" (254 mm)
10" (254 mm)
10.00" (254 mm)
L
OUTLET
A
AIR FLOW
H
INLET
AIR FLOW
B
7/8"
[22mm]
Fan Size
08SQ
09SQ
10SQ
Internal Volume Gal (L)
0.07 (16.7)
0.07 (16.7)
0.07 (.27)
Operating Weight Lbs (Kg)
9.7 (4.4)
9.7 (4.4)
9.7 (4.4)
Notes:
1. Location of coil connections is determined by facing air steam. R.H. Coil connections shown, L.H. not available.
2. Coil furnished with stub sweet connections.
128 VAV-PRC012-EN
Dimensional Data
Coil Information For Low Height Parallel Plenum Inlet 2-Row Coil
Fan Size
08SQ
09SQ
10SQ
Coil Connection 2 Row
7/8" (22 mm) O.D.
7/8" (22 mm) O.D.
.875" (22 mm) O.D.
A
6 1/4" (157 mm)
6 1/4" (157 mm)
6.20" (157 mm)
B
2 1/8" (55 mm)
2 1/8" (55 mm)
2.18" (55 mm)
L
20" (508 mm)
20" (508 mm)
20.00" (508 mm)
H
10" (254 mm)
10" (254 mm)
10.00" (254 mm)
VAV-PRC012-EN
Fan Size
08SQ
09SQ
10SQ
Internal Volume Gal (L)
0.16 (39.0)
0.16 (39.0)
0.16 (.61)
Operating Weight Lbs (Kg)
13.7 (6.2)
13.7 (6.2)
13.7 (6.2)
Notes:
1. Location of coil connections is determined by facing air steam. R.H. Coil connections shown, L.H. not available.
2. Coil furnished with female sweat connections.
3.
0.85" lip NOT on 08SQ or 09SQ units.
129
Dimensional Data
Coil Information For Low Height Parallel Discharge 1-Row Coil
Fan Size
08SQ
09SQ
Coil Connection
3/8" (10 mm) O.D.
3/8" (10 mm) O.D.
A B L H W
9.00" (229 mm) 1.65" (42 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm)
9.00" (229 mm) 1.65" (42 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm)
130
Fan Size
08SQ
09SQ
Internal Volume Gal (L)
0.07 (.28)
0.07 (.28)
Operating Weight Lbs (Kg)
9.7 (4.4)
9.7 (4.4)
Notes:
1. Location of coil connections is determined by facing air stream. L.H. Coil connections shown, R.H. opposit.
2. Coil furnished with stub sweat connections.
3. Coil is rotated to achieve opposite hand connection. Note: Water inlet is always on the bottom and outlet on the top.
4. Access Panel is standard.
VAV-PRC012-EN
Dimensional Data
Coil Information For Low Height Parallel Discharge 2 Row Coil
Fan Size
08SQ
09SQ
Coil Connection
7/8" (22 mm) O.D.
7/8" (22 mm) O.D.
A
6.25" (159 mm)
6.25" (159 mm)
B
2.00 (51 mm)
2.00 (51 mm)
L H
20.00" (508 mm) 10.00" (254 mm)
20.00" (508 mm) 10.00" (254 mm)
W
6.75" (171 mm)
6.75" (171 mm)
VAV-PRC012-EN
Fan Size
08SQ
09SQ
Internal Volume Gal (L)
0.17 (.64)
0.17 (.64)
Operating Weight Lbs (Kg)
13.7 (6.2)
13.7 (6.2)
Notes:
1. Location of coil connections is determined by facing air stream. L.H. Coil connections shown, R.H. opposite.
2. Coil furnished with stub sweat connections.
3. Use port at bottom for inlet and port at top for outlet. For 2-row coils, always plumb in counter flow orientation: Left hand unit's water inlet on bottom, and outlet on the top. Right hand unit’s water inlet on top and outlet on bottom.
4. Access Panel is standard.
131
Dimensional Data
LOW-HEIGHT PARALLEL ELECTRIC HEAT (LPEF) FAN SIZES 08SQ & 09SQ
FAN
INLET SIZE
AVAILABILITY
SIZE NOMINAL Ø (INCHES)
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
08SQ
5, 6, 8 127, 152, 203
DISCHARGE DIMENSIONS
H
11.00" (279 mm)
W L
A
B
40.00" (1016 mm) 30.00" (762 mm) 19.00" (483 mm)
9.50" (241 mm)
09SQ
6, 8
152, 203
D
UNIT WT
WT LBS
(kg)
4.00" (102 mm) 104 (47.2)
109 (49.4)
09SQ
8 x 14 203 x 356
3.25" (83 mm) 118 (53.5)
Optional Attenuator
Field Installed
132
5.00"
(127 mm)
20.00"
(508 mm)
5.
Actuator, Controller and
Fan Controls located in Enclosure
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.00
(102 mm)
32.00"
(813 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
18.00"
(457 mm)
17.50"
(445 mm)
7.
L
Heater
Airflow
Discharge Outlet
6.00"
(152 mm)
TOP VIEW
W
H
10.50"
(267 mm)
B
5.
Actuator, Controller and
Fan Controls located in Enclosure
Rectangular Damper
8" x 14"
(203 mm X 356 mm)
Rectangular Damper Detail
Fan Size
08SQ
09SQ
5.
Actuator, Controller and
Fan Controls located in Enclosure
Filter Size
10" x 20 " x 1"
(254 mm x 508 mm x 25 mm)
Atten Wt
Lbs
(kg)
10 (4.5)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Air valve centered between top and bottom panel.
5. Control box enclosure provided with all control types.
6. All high & low voltage controls have same-side NEC jumpback clearance. (Left-hand
shown, right-hand/mirror image optional.)
7. Flange adds 2" to width and length of unit.
A
DISCHARGE VIEW
VAV-PRC012-EN
LOW-HEIGHT PARALLEL ELECTRIC (LPEF) FAN SIZE 10SQ
Dimensional Data
VAV-PRC012-EN 133
Dimensional Data
Low Height Series Fan-Powered Terminal Units
LOW-HEIGHT SERIES COOLING ONLY (LSCF) FAN SIZES 08SQ & 09SQ
FAN
SIZE
08SQ
09SQ
09SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (inches)
5, 6, 8
6, 8
8 x 14
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
H
11.00" (279 mm)
127, 152, 203
152, 203
203 x 355
DISCHARGE DIMENSIONS
W L
26.00" (660 mm)
A B
40.00" (1016 mm)
18.00" (457 mm) 10.00" (254 mm)
D
Unit Wt
Lbs
(kg)
4.00" (102 mm)
4.50" (114 mm)
86 (39)
96 (44)
105 (47)
Optional Attenuator
Field Installed
134
17.50"
(445 mm)
5.00"
(127 mm)
10.50"
(267 mm)
TOP VIEW
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.
Actuator, Controller and
Fan Controls located in Enclosure
32.00"
(813 mm)
Optional Attenuator
Field Installed
Air
Valve
4.00
(102 mm)
Airflow
Plenum Inlet
18.00"
(457 mm)
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
W
Airflow
Discharge Outlet
L
B
7.
4.
Actuator, Controller and
Fan Controls located in Enclosure
Rectangular Damper Detail
4.
Actuator, Controller and
Fan Controls located in Enclosure
Fan Size
08SQ
09SQ
Filter Size
10" x 10" x 1"
(254 mm x 254 mm x 25 mm)
Atten Wt
Lbs
(kg)
10 (4.5)
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Control box enclosure provided with all control types.
5. Air valve centered between top and bottom panel.
6. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
7. Flange adds 2" to width and length of unit.
H
DISCHARGE VIEW
A
1.00"
(25 mm)
VAV-PRC012-EN
Dimensional Data
LOW-HEIGHT SERIES COOLING (LSCF) FAN SIZE 10SQ
FAN
SIZE
10SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
8
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
203
H W L
11.00" (279 mm) 48.00" (1219 mm)
36.00" (914 mm)
DISCHARGE DIMENSIONS
C
A B
38.00" (965 mm)
10.00" (254 mm)
4.00" (102 mm)
D
UNIT WT
WT LBS
(kg)
20.00" (508 mm) 120 (54)
10SQ 8 x 14
203 x 356
17.50" (445 mm) 130 (59)
Optional Attenuator
Field Installed
2. Optional Attenuator
Field Installed
8.
Actuator, Controller and
Fan Controls located in Enclosure
8.
Actuator, Controller and
Fan Controls located in Enclosure
2.
18.00"
(457 mm)
32.00"
(813 mm)
Optional Attenuator
Field Installed
D
Airflow
Plenum Inlet
Primary
Airflow
C
32.00"
(813 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
17.50"
(445 mm)
5.00"
(127 mm)
Rectangular Damper Detail
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
L
9.
Fan Size
10SQ
Filter Size
10" x 16" x 1"
(254 mm x 406 mm x 25 mm)
Atten Wt
Lbs
(kg)
20 (9)
H B
10.50"
(267 mm)
W
Airflow
Discharge Outlet
TOP VIEW
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. Air valve centered between top and bottom panel.
5. Heating coil uninsulated. External insulation may be field
supplied and installed as required.
6. All high & low voltage controls have same-side NEC jumback
clearance. (Left-hand shown, right-hand/mirror image optional.)
7. Bottom Access panel standard.
8. Control box enclosure provided with all control types.
9. Flange adds 2" to width and length of unit.
A
DISCHARGE VIEW
VAV-PRC012-EN 135
Dimensional Data
LOW-HEIGHT SERIES HOT WATER (LSWF) FAN SIZES 08SQ & 09SQ
FAN
SIZE
08SQ
09SQ
09SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
5, 6, 8
6, 8
8 x 14
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
127, 152, 203
152, 203
203 x 355
H
11.00" (279 mm)
DISCHARGE DIMENSIONS
W L
26.00" (660 mm) 40.00" (1016 mm)
A
18.00" (457 mm)
B
10.00" (254 mm)
D
4.00" (102 mm)
4.50" (114 mm)
Unit Wt
Lbs
(kg)
95 (43)
105 (48)
114 (52)
Optional Attenuator
Field Installed
136
17.50"
(445 mm)
5.00"
(127 mm)
10.50"
(267 mm)
TOP VIEW
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.
Actuator, Controller and
Fan Controls located in Enclosure
32.00"
(813 mm)
Optional Attenuator
Field Installed
Air
Valve
4.00
(102 mm)
Airflow
Plenum Inlet
18.00"
(457 mm)
L
4.
Actuator, Controller and
Fan Controls located in Enclosure
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
Rectangular Damper Detail
4.
Actuator, Controller and
Fan Controls located in Enclosure
Fan Size
08SQ
09SQ
Filter Size
10" x 10" x 1"
(254 mm x 254 mm x 25 mm)
Atten Wt
Lbs
(kg)
10 (4.5)
6.80"
(173 mm)
8.
Water
Coil
Airflow
Discharge Outlet
W
DISCHARGE VIEW
A
B
1.00"
(25 mm)
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Flanged discharge outlet accepts up to a 1" (25 mm)
duct flange.
3. Bottom Access panel standard.
4. Control box enclosure provided with all control types.
5. Air valve centered between top and bottom panel.
6. Heating coil uninsulated. External insulation may be field
supplied and installed as required.
7. All high & low voltage controls have same-side NEC
jumpback clearance. (Left-hand shown, right-hand/mirror
image optional.)
8. Flange adds 2" to width and length of unit.
VAV-PRC012-EN
Dimensional Data
LOW-HEIGHT SERIES HOT WATER (LSWF) FAN SIZE 10SQ
FAN
SIZE
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
10SQ 8
10SQ 8 x 14
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
203
DISCHARGE DIMENSIONS
H W L C
11.00" (279 mm)
A B
48.00" (1219 mm) 36.00" (914 mm) 38.00" (965 mm) 10.00" (254 mm) 4.00" (102 mm)
203 x 356
D
20.00" (508 mm)
UNIT WT
WT LBS
(kg)
136 (62)
17.50" (445 mm) 146 (66)
Optional Attenuator
Field Installed
2.
Optional Attenuator
Field Installed
8.
Actuator, Controller and
Fan Controls located in Enclosure
8.
Actuator, Controller and
Fan Controls located in Enclosure
18.00"
(457 mm)
32.00"
(813 mm)
Optional Attenuator
Field Installed
D
Airflow
Plenum Inlet
10.50"
(267 mm)
17.50"
(445 mm)
5.00"
(127 mm)
2.
Primary
Airflow
C
32.00"
(813 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
W
Airflow
Discharge Outlet
TOP VIEW
B
L
9.
6.80"
(173 mm)
Rectangular Damper Detail
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
Fan Size
10SQ
Filter Size
8.
Actuator, Controller and
Fan Controls located in Enclosure
10" x 16" x 1"
(254 mm x 406 mm x 25 mm)
Atten Wt
Lbs
(kg)
20 (9)
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. Air valve centered between top and bottom panel.
5. Heating coil uninsulated. External insulation may be field
supplied and installed as required.
6. All high & low voltage controls have same-side NEC
jumpback clearance. (Left-hand shown, right-hand/mirror
image optional.)
7. Bottom Access panel standard.
8. Control box enclosure provided with all control types.
9. Flange adds 2" to width and length of unit.
A
DISCHARGE VIEW
VAV-PRC012-EN 137
Dimensional Data
138 VAV-PRC012-EN
Dimensional Data
VAV-PRC012-EN 139
Dimensional Data
LOW-HEIGHT SERIES ELECTRIC HEAT (LSEF) FAN SIZES 08SQ & 09SQ
FAN
SIZE
08SQ
09SQ
09SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
5, 6, 8
6, 8
8 x 14
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
127, 152, 203
152, 203
203 x 355
H
11.00" (279 mm)
W
26.00" (660 mm)
DISCHARGE DIMENSIONS
L
A
40.00" (1016 mm) 14.00" (356 mm)
B
9.00" (229 mm)
D
4.00" (102 mm)
4.50" (114 mm)
Unit Wt
Lbs
(kg)
101 (45.8)
111 (50.3)
120 (54.4)
Optional Attenuator
Field Installed
140
17.50"
(445 mm)
5.00"
(127 mm)
10.50"
(267 mm)
20.00"
(508 mm)
D
Primary
Airflow
Valve 5"
6.50"
(165 mm)
4.
Actuator, Controller and
Fan Controls located in Enclosure
32.00"
(813 mm)
Optional Attenuator
Field Installed
Air
Valve
4.00
(102 mm)
Airflow
Plenum Inlet
18.00"
(457 mm)
Electric
Heater
Airflow
Discharge Outlet
20.00"
(508 mm)
A
4.
Actuator, Controller and
Fan Controls located in Enclosure
L
8.
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
Rectangular Damper Detail
Fan Size
08SQ
09SQ
Filter Size
4.
Actuator, Controller and
Fan Controls located in Enclosure
10" x 10" x 1"
(254 mm x 254 mm x 25 mm)
Atten Wt
Lbs
(kg)
10 (4.5)
B
TOP VIEW
H
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted installations.
2. Flanged discharge outlet accepts up to 1" (25 mm) duct flange.
3. Bottom Access panel standard.
4. Control box enclosure provided with all control types.
5. Air valve centered between top and bottom panel.
6. Heating coil uninsulated. External insulation may be field supplied and
installed as required.
7. All hight & low voltage controls have same-side NEC jumpback clearance.
(Left-hand shown, right-hand/mirror image optional.)
8. Flange adds 2" to width and length of unit.
DISCHARGE VIEW
VAV-PRC012-EN
Dimensional Data
LOW-HEIGHT SERIES ELECTRIC (LSEF) FAN SIZE 10SQ
FAN
SIZE
10SQ
INLET SIZE
AVAILABILITY
NOMINAL Ø (INCHES)
8
INLET SIZE
AVAILABILITY
NOMINAL Ø (mm)
203
H W
11.00" (279 mm) 48.00" (1219 mm)
10SQ
8 x14 203 x 356
L
36.00" (914 mm)
DISCHARGE DIMENSIONS
A
B
19.00" (483 mm) 9.50" (241 mm)
C
4.00" (102 mm)
D
UNIT WT
WT LBS
(kg)
20.00" (508 mm) 145 (65.8)
17.50" (445 mm)
155 (70.3)
Optional Attenuator
Field Installed
18.00"
(457 mm)
17.50"
(445 mm)
5.00"
(127 mm)
32.00"
(813 mm)
Optional Attenuator
Field Installed
D
Airflow
Plenum Inlet
2.
Optional Attenuator
Field Installed
8.
Actuator, Controller and
Fan Controls located in Enclosure
8.
Actuator, Controller and
Fan Controls located in Enclosure
2.
Primary
Airflow
C
Airflow
Plenum Inlet
32.00"
(813 mm)
Optional Attenuator
Field Installed
W
L
9.
Rectangular Damper Detail
Rectangular Damper
8" x 14"
(203 mm x 356 mm)
8.
Actuator, Controller and
Fan Controls located in Enclosure
Fan Size
10SQ
Filter Size
10" x 16" x 1"
(254 mm x 406 mm x 25 mm)
Atten Wt (Qty 2)
Lbs
(kg)
20 (9.1)
24.00"
(610 mm)
Heater
Plenum Area
11.00"
(279 mm)
8.00"
(203 mm)
Airflow
Discharge Outlet
TOP VIEW
NOTES:
1. Allow a minimum 6" (152 mm) plenum inlet clearance for
unducted installations.
2. Filter location with optional Attenuator.
3. Attenuator-factory assembled, field installed.
4. Air valve centered between top and bottom panel.
5. Heating coil uninsulated. External insulation may be field supplied
and installed as required.
6. All high & low voltage controls have same-side NEC jumpback
clearance. (Left-hand shown, right-hand/mirror image optional.)
7. Bottom Access panel standard.
8. Control box enclosure provided with all control types.
9. Flange adds 2" to width and length of unit.
H B
10.50"
(267 mm)
A
DISCHARGE VIEW
VAV-PRC012-EN 141
Mechanical Specifications: Fan-Powered
MODELS: VPCF, VPWF, VPEF, VSCF, VSWF, VSEF, LPCF, LPWF, LPEF,
LSCF, LSWF, & LSEF
VP, LP = Parallel Fan Powered Units
VS, LS = Series Fan Powered Units
Note: L = Low Height
Model Break Downs
• VPCF, VSCF, LPCF, & LSCF = Cooling Only
• VPWF, VSWF, LPWF, & LSWF = With Hot Water Coil
• VPEF, VSEF, LPEF, & LSEF = With Electric Coil
CASING
22-gage galvanized steel. Hanger brackets, side access (standard height - V model numbers) or bottom access (low height - L model numbers), and plenum filter are provided as standard.
AGENCY LISTING
The unit is UL and Canadian UL Listed as a room air terminal unit. Control # 9N65.
AHRI 880 Certified.
INSULATION
1/2" (12.7 mm) Matte-faced Insulation—.
The interior surface of the unit casing is acoustically and thermally lined with ½-inch, 1.5 lb/ft3 (12.7 mm, 24.0 kg/m3) composite density glass fiber with a high-density facing.The insulation R-Value is 1.9.The insulation is UL listed and meets NFPA-90A and UL 181 standards.There are no exposed edges of insulation (complete metal encapsulation).
1" (25.4 mm) Matte-faced Insulation—.
The interior surface of the unit casing is acoustically and thermally lined with 1 inch, 1.0 lb/ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber with a high-density facing. The insulation R-Value is 3.85. The insulation is UL listed and meets NFPA-
90A and UL 181 standards. There are no exposed edges of insulation (complete metal encapsulation).
1" (25.4 mm) Foil-faced Insulation—.
The interior surface of the unit casing is acoustically and thermally lined with 1-inch, 1.5 lb/ft3 (25.4 mm, 24.0 kg/m3) density glass fiber with foil facing.The
insulation R-Value is 4.1.The insulation is UL listed and meets NFPA-90A and UL 181 standards as well as bacteriological standard ASTM C 665.There are no exposed edges of insulation (complete metal encapsulation).
1" (25.4 mm) Double-wall Insulation—.
The interior surface of the unit casing is acoustically and thermally lined with a 1-inch, 1.0 lb./ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber with high-density facing.The insulation R-value is 3.8.The insulation is UL listed and meets NFPA-
90A and UL 181 standards.The insulation is covered by an interior liner made of 26-gage galvanized steel. All wire penetrations are covered by grommets. There are no exposed edges of insulation
(complete metal encapsulation).
3/8" (9.5 mm) Closed-cell Insulation—.
The interior surface of the unit casing is acoustically and thermally lined with 3/8-inch, 4.4 lb/ft3 (9.5 mm, 70.0 kg/m3) closed-cell insulation. The insulation is UL listed and meets NFPA-90A and UL 181 standards.The insulation has an R-Value of 1.4. There are no exposed edges of insulation (complete metal encapsulation).
PRIMARY AIR VALVE
Air Valve Round—.
The primary air inlet connection is an 18-gage galvanized steel cylinder sized to fit standard round duct. A multiple-point, averaging flow sensing ring is provided with balancing
142 VAV-PRC012-EN
Mechanical Specifications: Fan-Powered
taps for measuring +/-5% of unit cataloged airflow. An airflow-versus-pressure differential calibration chart is provided. The damper blade is constructed of a closed-cell foam seal that is mechanically locked between two 22-gage galvanized steel disks. The damper blade assembly is connected to a cast zinc shaft supported by self-lubricating bearings. The shaft is cast with a damper position indicator. The valve assembly includes a mechanical stop to prevent overstroking. At 4 in. wg, air valve leakage does not exceed 1% of cataloged airflow.
Air Valve Rectangular.
—Inlet collar is constructed of 22-gage galvanized steel sized to fit standard rectangular duct. An integral multiple-point, averaging flow-sensing ring provides primary airflow measurement within +/-5% of unit cataloged airflow. Damper is 22-gage galvanized steel.The damper blade assembly is connected to a solid metal shaft supported by self-lubricating bearings. The shaft is cast with a damper position indicator. The valve assembly includes a mechanical stop to prevent over-stroking. At 3.0 in. wg, air valve leakage does not exceed 44 cfm
(21 L/s).
Table 135. Fan-inlet combinations
03SQ 04SQ
VPXF
05SQ 06SQ 07SQ
LSXF
09SQ 10SQ Inlet
5"
6"
8"
10"
12"
14"
16"
8 x 14"
02SQ
X
X
X
X X
X
X
X X
X
X
X X
X
X
X
X
X
X
X
X
X
X
08SQ
X
X
X
X
X
X X
Attenuators
The attenuator is 22-gage galvanized steel with an internal acoustical liner. Attenuators have been tested in accordance with AHRI 880 standards.
Fan Motor
PSC—.
Single-speed, direct-drive, permanent split capacitor type. Thermal overload protection provided. Motors will be designed specifically for use with an open SCR. Motors will accommodate anti-backward rotation at start up. Motor and fan assembly are isolated from terminal unit.
ECM—.
Electrically Commutated Motor is designed for high-efficient operation with over 70% efficiency throughout the operating range.
FAN SPEED CONTROL
Variable Speed Control Switch (SCR)—.
The SCR speed control device is provided as standard and allows the operator infinite fan speed adjustment.
Transformer
The 50-VA transformer is factory-installed in the fan control box to provide 24 VAC for controls.
Disconnect Switch
A toggle disconnect is provided as standard and allows the operator to turn the unit on or off by toggling to the appropriate setting. This switch breaks both legs of power to the fan and the electronic controls (if applicable)
Note: Not provided on Low Height units with pneumatic controls.
VAV-PRC012-EN 143
Mechanical Specifications: Fan-Powered
144
Outlet Connection
Flanged Connection—Rectangular opening on unit discharge to accept 90° flanged ductwork connection.
Filter
A 1" (25 mm) filter is provided on the plenum inlet and attaches to the unit with a filter frame.
Hot Water Coil
Parallel Water Coils—.
factory- installed on the plenum inlet. The coil has 1-row with 144 aluminum-plated fins per foot (.305 m), and if needed 2-row with 144 aluminum-plated fins per foot
(.305 m). Full fin collars provided for accurate fin spacing and maximum fin-tube contact. The 3/
8" (9.5 mm) OD seamless copper tubes are mechanically expanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300 psig (2068 kPa) air pressure under water.
Coil connections are brazed.
Series Water Coils.
—factory-installed on the fan discharge. The coil has 1-row with 144 aluminum-plated fins per foot (.305 m) and, if needed, 2-row with 144 aluminum-plated fins per foot
(.305 m). Full fin collars provided for accurate fin spacing and maximum fin-tube contact. The 3/
8" (9.5 mm) OD seamless copper tubes are mechanically expanded into the fin collars. Coils are proof tested at 450 psig (3102 kPa) and leak tested at 300 psig (2068 kPa) air pressure under water.
Coil connections are brazed. Gasketed access panels, which are standard, are attached with screws.
Electric Heat Coil
The electric heater is a factory-provided and installed, UL recognized resistance open-type heater.
It also contains a disc-type automatic pilot duty thermal primary cutout, and manual reset load carrying thermal secondary device. Heater element material is nickel-chromium. The heater terminal box is provided with 7/8" (22 mm) knockouts for customer power supply. Terminal connections are plated steel with ceramic insulators. All fan-powered units with electric reheat are single-point power connections.
Electric Heat Options
Silicon-Controlled Rectifier (SCR).
Optional electric heat control that provides modulation.
Magnetic Contactor.
Optional electric heater 24V contactor for use with direct digital controls.
Mercury Contactor.
Optional electric heater 24V contactor for use with direct digital controls.
P.E. Switch with Magnetic Contactor.
This optional switch and magnetic contactor is for use with pneumatic controls.
P.E. Switch with Mercury Contactor.
This optional switch and mercury contactor is for use with pneumatic controls.
Airflow Switch.
Optional air pressure device designed to disable heater when system fan is off.
Power Fuse.
If a power fuse is chosen with a unit containing electric heat, then a safety fuse is located in the electric heater’s line of power to prevent power surge damage to the electric heater.
Any electric heat unit with a calculated MCA greater than or equal to 30 will have a fuse provided.
Disconnect Switch.
A standard factory-provided door interlocking disconnect switch on the heater control panel disengages primary voltage to the terminal.
Unit Controls Sequence Of Operation
Parallel
The unit controller continuously monitors the zone temperature against its setpoint and varies the primary airflow as required to meet zone setpoints. Airflow is limited by minimum and maximum
VAV-PRC012-EN
Mechanical Specifications: Fan-Powered
VAV-PRC012-EN position set points. For a parallel unit, the controller will intermittently start the fan upon a call for heat. Upon a further call for heat, reheat is enabled.
1.
Primary Airflow—The fan energizes when primary airflow drops below the fan setpoint airflow.
The fan automatically starts when the zone temperature drops to the heating temperature setpoint.
2. Zone Temperature—The fan energizes when the zone temperature drops to a selectable number of degrees above the heating temperature setpoint.
Series
The controller will start and run the fan continuously during the occupied mode and intermittently during the unoccupied mode. Upon a further call for heat, any hot water or electric heat associated with the unit is enabled.
Direct Digital Controls
DDC Actuator—.
Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkage release button. Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb, a 90-second drive time, and is non-spring return.Travel is terminated by end stops at fully-opened and -closed positions. An integral magnetic clutch eliminates motor stall.
DDC Actuator - Belimo — LMB24-3-TTN 3-wire, 24 VAC/DC, floating-point, quarter turn actuator with linkage release button. Actuator has a constant drive rate independent of load, a rated torque of 45 in-lb, a 95 second drive time, and is non-spring return. Travel is terminated by end stops at fully-opened and -closed positions. Internal electronic control prevents motor stall when motor reaches end stops.
Direct Digital Controller—.
The microprocessor-based terminal unit controller provides accurate, pressure-independent control through the use of a proportional integral control algorithm and direct digital control technology. The controller, named the Unit Control Module
(UCM), monitors zone temperature setpoints, zone temperature and its rate of change, and valve airflow using a differential pressure signal from the pressure transducer. Additionally, the controller can monitor either supply duct air temperature or CO2 concentration via appropriate sensors.The controller is provided in an enclosure with 7/8" (22 mm) knockouts for remote control wiring. A Trane UCM zone sensor is required.
DDC Zone Sensor—.
The UCM controller senses zone temperature through a sensing element located in the zone sensor. In addition to the sensing element, zone sensor options may include an externally-adjustable setpoint, communications jack for use with a portable edit device, and an override button to change the individual controller from unoccupied to occupied mode. The override button has a cancel feature that will return the system to unoccupied. Wired zone sensors utilize a thermistor to vary the voltage output in response to changes in the zone temperature.
Wiring to the UCM controller must be 18- to 22-awg. twisted pair wiring.The setpoint adjustment range is 50–88ºF (10–31°C). Depending upon the features available in the model of sensor selected, the zone sensor may require from a 2-wire to a 5-wire connection.Wireless zone sensors report the same zone information as wired zone sensors, but do so using radio transmitter technology.
Therefore with wireless, wiring from the zone sensor to the UCM is unnecessary.
Digital Display Zone Sensor with Liquid Crystal Display (LCD)—.
The digital display zone sensor contains a sensing element, which sends a signal to the UCM. A Liquid Crystal Display (LCD) displays setpoint or space temperature. Sensor buttons allow the user to adjust setpoints, and allow space temperature readings to be turned on or off. The digital display zone sensor also includes a communication jack for use with a portable edit device, and an override button to change the UCM from unoccupied to occupied.The override button has a cancel feature, which returns the system to unoccupied mode.
Trane LonTalk/BACnet—.
The controller is designed to send and receive data using LonTalk or
BACnet. Current unit status conditions and setpoints may be monitored and/or edited from any of several LonTalk or BACnet compatible system-level controllers.
145
Mechanical Specifications: Fan-Powered
146
Pneumatic Controls
Normally Open Actuator—.
Pneumatic 3 - 8 psig (20 - 55 kPa) spring-range pneumatic actuator.
3011 Pneumatic Volume Regulator (PVR)—.
The regulator is a thermostat reset velocity controller, which provides consistent air delivery within 5% of cataloged flow down to 18% of unit cataloged cfm, independent of changes in system static pressure. Factory-calibrated, fieldadjustable setpoints for minimum and maximum flows. Average total unit bleed rate, excluding thermostat, is 28.8 scim at 20 psig (7.87 ml/min at 138 kPa) supply.
UNIT OPTIONS
Power Fuse (VPCF, VPWF)—.
Optional fuse is factory-installed in the primary voltage hot leg.
HOT WATER VALVES
Two-Position Valve—.
The valve is a field-adaptable, 2-way or 3-way configuration and ships with a cap to be field-installed when configured as a 2-way valve. All connections are National Pipe
Thread (NPT).The valve body is forged brass with a hard chrome-plated brass stem. Upon demand, the motor strokes the valve.When the actuator drive stops, a spring returns the valve to its fail-safe position.The valves come with a manual operating lever that allows for the valve to be opened for system flushing. It will reset to normal position the first time the valve is cycled.
Flow Capacity – 4.0 Cv
Overall Diameter – ½" NPT
Close-off Pressure – 30 psi (207 kPa)
Flow Capacity – 5.0 Cv
Overall Diameter – 3/4" NPT
Close-off Pressure – 14.5 psi (100 kPa)
Flow Capacity – 8.0 Cv
Overall Diameter – 1" NPT
Close-off Pressure – 9 psi (62 kPa)
Maximum Operating Fluid Temperature – 200 deg F (95ºC)
Maximum system pressure – 300 psi (2067 kPa)
Maximum static pressure – 300 psi (2067 kPa)
Electrical Rating – 7 VA at 24 VAC, 6.5 Watts, 50/60 Hz
18" wire leads are provided on each valve.
Proportional Water Valve—The valve is a field-adaptable, 2-way or 3-way configuration and ships with a plug in B port. This configures the valve for 2-way operation. For 3-way operation, remove the plug. The intended fluid is water or water and glycol (50% maximum glycol). The actuator is a synchronous motor drive.The valve is driven to a predetermined position by the UCM controller using a proportional plus integral control algorithm. If power is removed, the valve stays in its last position. The actuator is rated for plenum applications under UL 2043 and UL 873 standards.
Pressure andTemperature Ratings –The valve is designed and tested in full compliance with ANSI
B16.15 Class 250 pressure/temperature ratings, ANSI B16.104 Class IV control shutoff leakage, and
ISA S75.11 flow characteristic standards.
Flow Capacity – 0.70 Cv, 2.7 Cv, 6.60 Cv, 8.00 Cv
Overall Diameter – ½" NPT
Maximum Allowable Pressure – 300 psi (2068 kPa)
Maximum Operating Fluid Temperature – 201ºF (94°C)
Maximum Close-off Pressure – 60 psi (0.4 MPa)
Electrical Rating – 3VA at 24 VAC
8” plenum rated cable with AMP Mate-N-Lok connector
VAV-PRC012-EN
DDC Controls
Control Logic
DDC controllers are today’s industry standard. DDC controllers provide system-level data used to optimize system performance. Variables such as occupied/unoccupied status, minimum and maximum airflow setpoints, temperature and temperature setpoints, valve position, fan status (on or off, and mode of operation: series or parallel), reheat status (on or off), box type and air valve size, temperature correction offsets, flow correction values, ventilation fraction, etc. are available on a simple twisted-shielded wire pair.
Trane DDC controllers provideTrane-designed, solid-state electronics intended specifically forVAV temperature control in space comfort applications. DDC control capabilities include:
• Proportional plus integral control loop algorithm for determining required airflow needed to control room temperature. Airflow is limited by active minimum and maximum airflow setpoints.
• Pressure-independent (PI) operation, which automatically adjusts valve position to maintain required airflow. In certain low-flow situations or in cases where the flow measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.
• Cooling and heating control action of air valve. In cooling control action, the DDC controller matches cooling airflow to cooling load. In heating control action, the DDC controller matches the heating airflow to control heating load.The DDC controller will automatically change over to cooling control action if the supply air temperature is below the room temperature and will automatically change over to heating control action if the supply air temperature is 10°F or more above the room temperature. If the supply air temperature is between the room temperature and the room temperature plus 10°F, then the DDC controller will provide the active minimum airflow.The DDC controller first chooses theTracer™ SC -supplied supply air temperature value to use for auto changeover. If this is not available, it uses the temperature provided by the optional auxiliary temperature sensor. If this is also not available, it uses the heating/cooling mode assigned by Tracer SC or the DDC controller’s service tool (Everyware™or Rover™ V4).
• Multiple reheat control options including staged electric, staged hot-water (normally on or normally off), proportional hot-water, and slow pulsed width modulation. Modulating reheat options utilize a separate reheat proportional-plus-integral control loop from that controlling airflow into the room. Staged reheat options utilize a control algorithm based on heating setpoint and room temperature.
• 24 VAC binary input that can be configured as a generic input or as occupancy input. When the
DDC controller is operation with Tracer SC, the status of the input is provided to Tracer for its action. In stand-alone operation and when configured for an occupancy input, the input will control occupancy status of the DDC controller.
• Auxiliary temperature analog input that can be configured for an auxiliary temperature sensor or a 2-to-10 VDC CO
2 sensor. When sensor is mounted in the supply air duct and configured for temperature, the value of the input is used as status-only byTracer SC ifTracer SC is providing a supply air temperature to the DDC controller. Otherwise, the input will be used for determining control action of the DDC controller. When configured for a CO
2 of the input is used as a status-only input by Tracer SC.
sensor, the value
• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valve and the other controller controls the heating air valve. With constant-volume sequences, the discharge air volume is held constant by controlling discharge air volume with the heating
UCM.
VAV-PRC012-EN 147
DDC Controls
Figure 6.
Flow sensor signal vs. airflow delivery
5
1
4" 5" 6" 8" 10" 12" 14" 16"
0.1
0.01
10 100 1,000 10,000
Cfm
Note:
Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller
Airflow Guidelines” in each section for unit performance.
DDC Remote Heat Control Options
When heat is added to the primary air atVAV unit before it enters zone, the air is said to be reheated.
Operating characteristics of four basic types of VariTrane DDC terminal reheat are discussed.
Fan-Powered Terminal Units: On/Off Hot Water Reheat
Two stages of on/off hot water reheat are available.The water valves used are 2-position and are either fully-opened or fully-closed.The heating minimum airflow setpoint is enabled during reheat.
On parallel-configured fan-powered units, the fan is energized when the space temperature falls below the active fan on/off point (active heating setpoint plus fan offset).The parallel fan is turned off when the space temperature rises above the active fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series configured fan-powered terminal units utilize continuous fan operation during all occupied settings and while unoccupied when minimum airflows are being enforced.
When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature is 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the zone temperature is 1°F (0.56°C) or more below the active heating setpoint, and de-energizes when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-Powered Terminal Units: Proportional Hot Water Reheat
Proportional hot water reheat uses 3-wire floating-point-actuator technology. The heating minimum airflow setpoint is enabled during reheat.
On parallel-configured fan-powered units, the fan is energized when the space temperature falls below the active fan on/off point (active heating setpoint plus fan offset).The parallel fan is turned off when the space temperature rises above the active fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
148 VAV-PRC012-EN
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VAV-PRC012-EN
Series-configured fan-powered terminal units utilize continuous fan operation during all occupied settings and while unoccupied when minimum airflows are being enforced.
When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
The water valve opens as space temperature drops below the heating setpoint.The degree to which the hot water valve opens is dependent on both the degree that space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already closed, the water valve fully closes when the zone temperature rises above the active heating setpoint by 0.5 °F (0.28 °C). When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: On/Off Electric Reheat
Two stages of staged electric reheat are available.The heating minimum airflow setpoint is enabled during reheat.
On parallel-configured fan-powered units, the fan is energized when the space temperature falls below the active fan on/off point (active heating setpoint plus fan offset).The parallel fan is turned off when the space temperature rises above the active fan on/off point (active heating setpoint plus fan offset).
Series-configured fan-powered terminal units utilize the continuous fan operation during all occupied settings and while unoccupied when minimum airflows are being enforced.
When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature rises 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the space temperature is 1.0°F (0.56°C) or more below the active heating setpoint, and is de-energized when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: Pulse-Width Modulation of Electric Heat
Electric heat is modulated by energizing for a portion of a three-minute time period. The heating minimum airflow setpoint is enabled during reheat. This allows exact load matching for energy efficient operation, and optimum zone temperature control. One or two stages can be used.
On parallel-configured fan-powered units, the fan is energized when the space temperature falls below the active fan on/off point (active heating setpoint plus fan offset).The parallel fan is turned off when the space temperature rises above the active fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series-configured fan-powered terminal units utilize the continuous fan operation during all occupied settings and while unoccupied when minimum airflows are being enforced. When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
The amount of reheat supplied is dependent on both the degree that space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already off, reheat de-energizes when the space temperature rises 0.5°F
(0.28°C) above the active heating setpoint.The Stage 1 “on” time is proportional to the amount of reheat required. For example, when 50% of stage 1 capacity is required, reheat is on for 90 seconds and off for 90 seconds. When 75% of stage 1 capacity is required, reheat is on for 135 seconds and off for 45 seconds. When 100% of stage 1 capacity is required, reheat is on continuously.
Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.
For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage
2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimum airflow setpoint is activated. When reheat is de-energized, the cooling minimum airflow setpoint it activated.
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150
DD00—Available for all VariTrane Units
(Trane actuator for field-installed DDC controls)
A unit controller is not provided. The air damper actuator is provided with an integral screw terminal block.
The fan contactor (fan-powered units), 24-VAC control power transformer (optional for single- and dual-duct units), and factory-installed electric heater contactor wires are attached to the outside of the unit for field connection of controls. A second actuator is provided with an integral screw terminal for dual-duct units.
24-VAC
Damper Controls
By Others
24-VAC to
Customer
Controls
CCW
COM
CW
Y
BL
M
Damper
Actuator
Load: 4 VA
Line Voltage
FAN RELAY
1
2
Fan
Transformer
24 VAC, 50 VA
2
3
Load: 6.5 VA
24-VAC Fan/Staged
Heat Controls
HEATER CONTROL BOX
1
2
3
4
5
C
1st
2nd
3rd
4
Load: 10 VA (MAGN)
Load: 12 VA (MERC)
24-VAC
Damper Controls
By Others
CCW
COM
CW
M
5.
Damper
Actuator
Load: 4 VA
NOTES:
1.
Factory-installed
Field Wiring
Optional or installed by others
2.
Located in Heater Terminal Box for electric heat on single-duct units.
Located in Control Box for cooling only and hot water heat on single-duct units.
Located in Control Box on all fan-powered units.
3.
Only available with fan-powered units.
4. Located in Heater Terminal box.
5.
Only available with dual-duct units.
VAV-PRC012-EN
VAV-PRC012-EN
DDC Controls
Available on all VariTrane Units
FM00 – Customer-supplied actuator and DDC controller factory-installed.
FM01 – Trane actuator and customer-supplied DDC controller factory-installed
All customer furnished controllers and actuators are installed and wired per control manufacturer's specifications.
Metal control enclosure is standard.
CCW
COM
CW
Actuator
Customer-furnished or Trane-supplied
24 VAC
Fan
Relay
Trane-supplied
(Fan-powered only)
BL
Transformer
Y
24 VAC, 50va
Standard – (Fan-powered)
Optional – (Single-duct and Dual-duct)
Customer-furnished
Controller
24VAC (hot) common
1st stage
2nd stage
3rd stage
Electric
Reheat
Contactors
Trane-supplied
LO LO
Airflow
Sensor
HI
Trane-supplied
NOTES:
1.
Factory-installed
Field Wiring
Optional or installed by others
2. NEMA-1 Enclosure provided.
Hot Water
Reheat
Optional
Trane-supplied water valve field-wired to controller.
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DDC Controls
Tracer™ UC400 and UC210 Programmable BACnet Controllers
Introduction
The Tracer UC400 and UC210 controllers are programmable general purpose BACnet, microprocessor-based, Direct Digital Controllers (DDC). When factory installed onTrane (Variable
Air Volume) VAV terminal units, it is factory downloaded with appropriate VAV programs and configuration settings.Trane VAV units have been made with either pneumatic, analog electronic, or microprocessor controls (DDC VAV).
The Tracer UC400 or UC210 controller can be configured from the factory with three different application programs: SpaceTemperature Control (STC), Ventilation Flow Control (VFC), and Flow
Tracking Control (FTC).
The Tracer UC400 or UC210 controller programmed for STC modulates a VAV's damper blade based on a zone temperature, measured airflow, and setpoints to continuously control conditioned air delivery to the space. The volume of incoming air is monitored and the damper adjusts to provide accurate control independent of the duct pressure. The damper modulates between operator setpoints depending on space conditions. Additionally, fan and heat outputs may be energized depending on the application.
TheTracer UC400 or UC210 controller configured forVFC can be applied to aVAV terminal and used to temper cold outdoor air (OA) that is brought into a building for ventilation purposes. The tempered air is intended to supply an air-handling unit (AHU), which provides comfort control to the zones it is serving.The VAV terminal supplies the correct amount of ventilation air, and when reheat is added, tempers the ventilation air to reduce the load on the air handler by sensing the discharge air temperature of the VAV unit and controlling its long-term average to the discharge air temperature setpoint.
TheTracer UC400 or UC210 controller can be configured for FTC and has two VAV units withTracer
UC400 controllers working together to provide flow tracking control. OneTracer UC400 or UC210 controller is configured from the factory with the Space temperature program and the other is downloaded with the FTC program.The STC airflow output is bound to the flow tracking controller airflow setpoint input. The flow tracking controller adds the configured airflow tracking offset
(positive or negative) to the airflow setpoint (communicated airflow setpoint) and controls the airflow to this setpoint.
The Tracer UC400 or UC210 controller is BTL compliant with BACnet, an open standard building automation protocol. It meets the Application Specific Controller (ASC) profile per ASHRAE 135-
2004. This allows the Tracer UC400 or UC210 controller to integrate with other BACnet systems.
Available Inputs
Inputs include a twisted/shielded communication link, zone sensor, duct temperature sensors
(optional), Occupancy Sensor (optional), Discharge Air Temperature (DAT) and/or Supply Air
Temperature (SAT), CO2 sensor, and 24 VAC power. In addition to the points used for the VAV application, the spare inputs and outputs on theTracer UC400 or UC210 controller may be used for ancillary control, which can be programmed using Tracer TU Tracer Graphical Programming 2
(TGP2).
Note: For more information on using spare points, see BAS-SVX20*-EN Tracer UC400
Programmable Controller Installation, Operation, and Maintenance.
General Features and Benefits
Assured Accuracy
• Proportional-plus-integral control loop algorithm for determining required airflow needed to control room temperature. Airflow is limited by active minimum and maximum airflow setpoints.
152 VAV-PRC012-EN
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VAV-PRC012-EN
• Pressure-independent (PI) operation that automatically adjusts valve position to maintain required airflow. In certain low-flow situations or in cases where the flow measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.
• When combined with the patentedTrane Flow ring and pressure transducer, flow is repeatable to +/- 5% accuracy across the Pressure Independent (PI) flow range. (See Valve/Controller
Airflow Guidelines section).
• Improved 2-Point Air Balancing is available – Assures optimized flow-sensing accuracy across the operating range.This provides a more accurate airflow balancing method when compared to typical single-point flow correction air balancing.
• Analog input resolution of +/- 1/8°F within the comfort range maximizes zone temperature control yielding excellent comfort control.
Reliable Operation
• Built for life – Trane products are designed to stand the test of time, with a proven design life that exceeds 20 years.
• Fully factory tested – fully screened and configured at the factory. All features are tested including fan and reheat stage energization, air valve modulation, and controller inputs and outputs.
Safe Operation
• All components, including the controller, pressure transducer, transformer, etc. are mounted in a NEMA 1 sheet metal enclosure and are tested as an assembly to UL1995 standards. The result is a rugged and safe VAV, controller, and thus, overall unit.
• When in PI-mode, EH is disabled when the sensed flow is below the minimum required.
• HW coilVAV units in ventilation flow control (VFC) have a Freeze protection algorithm to protect the water coil and the internal space from water damage.This is accomplished by driving the water valve to maximum position on alarm conditions.
System-Level Optimization
Trane controllers are designed to integrate into Tracer™ SC and leverage clear and clean unitcontroller related data for system level control decisions. Integrating aTrane VV550 controller into a Tracer SC Control system provides the next step in building system control.
Specifically, system-level decisions on how to operate all components can be made. Energy efficient optimization strategies like Static Pressure Optimization, Ventilation Reset, and CO
2
Demand-controlled Ventilation can be employed with the simple press of a button.The end-result is the most efficient and reliable building control system available.
Simplified Installation
Factory Commissioned Quality – All Trane DDC VAV controllers are factory-commissioned. This means that the DDC boards are powered and run-tested with your specific sequence parameters.
They are connected to a communication link to make sure that information and diagnostic data function properly. Before any VariTrane VAV unit ships they must pass a rigorous quality control procedure. You can be assured that a Trane VAV unit with Trane DDC VAV controls will work right out of the crate.
Zone sensor air balance – When applied to a Trane zone sensor with thumbwheel and on/cancel buttons, a balancing contractor can drive the primary air valve to maximum or minimum airflow from the sensor to determine the point of calibration to be used (maximum will result in optimum performance). The flow reading can then be calibrated from the sensor, without the use of additional service tools. (Non-LCD versions)
Tenant-Finish Heat Mode – In some office projects, the building is being constructed as tenants are being identified.Tenant-finish heat mode is designed for applications when a given floor has not been occupied.The main AHU system is used for heat and because the internal furnishings are not
153
DDC Controls
complete, the sensors have not been installed. In this case, the primary valve drives open using the heat of the main AHU to keep plumbing lines from freezing. When available, the operation of the VAV unit fan (series or parallel) remains unaffected.
Controller Flexibility
• 24 VAC binary input that can be configured as a generic input or as occupancy input. When the
DDC controller is operating with Tracer™ SC, the status of the input is provided to Tracer SC for its action. In stand-alone operation and when configured for an occupancy input, the input will control occupancy status of the DDC controller.
• Auxiliary temperature analog input configured for an auxiliary temperature sensor.The value of the input is used as status-only byTracer SC ifTracer SC is providing a supply air temperature to the DDC controller. Otherwise, the input will be used for determining heating/cooling control action of the VAV unit. When the auxiliary temperature sensor is located in the discharge of the unit, and attached to a Trane Tracer™ SC BAS, additional test sequencing and reporting is available to maximize VAV system capabilities and simplify system commissioning.
• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valve and the other controller controls the heating air valve. With constant-volume sequences, the discharge air volume is held constant by controlling discharge air volume with the heating
Controller.
• Tracer™ UC400 Programmable BACnet Controller certified performance ensures that a Trane
VAV with controller will provide state-of-the-art, consistent open communication protocol for integration with the industry’s latest (Non-Trane) building automation control systems, including Johnson Control, Andover, Siemans, Honeywell, etc.
• CO
2 demand controlled ventilation enables a HVAC system to adjust ventilation flow based on critical zone, average CO
2 of specified zones, etc. Trane demand controlled ventilation strategies are pre-defined for simplified application and can be easily customized to meet the needs of a specific system.
Trane DDC VAV Controller Logic
Control Logic
Direct Digital Control (DDC) controllers are today’s industry standard. DDC controllers share system-level data to optimize system performance (including changing ventilation requirements, system static pressures, supply air temperatures, etc.). Variables available via a simple twistedshielded wire pair include occupied/unoccupied status, minimum and maximum airflow setpoints, zone temperature and temperature setpoints, air valve position, airflow cfm, fan status (on or off), fan operation mode (parallel or series), reheat status (on or off), VAV unit type, air valve size, temperature correction offsets, flow correction values, ventilation fraction, etc.
With the advent ofTracer UC400 open protocol, the most reliable VAV controller is now available for ANY system. Gone are the days of being locked into a single supplier. Trane DDC controllers provideTrane-designed solid-state electronics intended specifically for VAV applications including:
3. Space Temperature Control
4. Ventilation Flow Control (100% outside air applications)
5. Flow Tracking Space Pressurization Control (New feature)
154 VAV-PRC012-EN
Figure 7.
Flow sensor single vs. airflow delivery
5
1
4"
5" 6" 8" 10" 12" 14" 16"
0.1
DDC Controls
VAV-PRC012-EN
0.01
10 100 1,000 10,000
Cfm
Note:
Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller
Airflow Guidelines” in each section for unit performance.
Space Temperature Control
Space temperature control applications are whereTrane emerged as an industry leader in quality and reliability. This did not occur overnight and has continued to improve as our controller and control logic has improved over time. STC employs controller logic designed to modulate the supply airstream and associated reheat (either local or remote) to exactly match the load requirements of the space.
Additionally, minimum and maximum airflow and specific controller sequence requirements are pre-programmed to ensure that appropriate ventilation standards are consistently maintained.
When connected to aTraneTracer™ SC, trend logging, remote alarming, etc. are available to fully utilize the power and capabilities of your systems.
General Operation-Cooling
In cooling control action, the DDC controller matches primary airflow to cooling load. The DDC controller will automatically change over to heating control action if the supply air temperature is above a configured/editable setpoint. When the supply air temperature is less than 10 degrees below this setpoint, the controller will automatically switch to cooling control action. The DDC controller first chooses the Tracer SC -provided supply air temperature value to use for auto changeover. If this is not available, it uses the temperature provided by the optional auxiliary temperature sensor (must be installed for inlet temperature monitoring). If this is also not available, it uses the heating/cooling mode assigned by Tracer Building Automation System or the DDC controller’s service tool.
General Operation-Reheat
In heating control action, the DDC controller matches primary airflow to heating load. The DDC controller will automatically change over to heating control action if the supply air temperature is above a configured/editable setpoint. When the supply air temperature is less than 10 degrees below this setpoint, the controller will automatically switch to cooling control action. The DDC controller first chooses the Tracer SC -provided supply air temperature value to use for auto changeover. If this is not available, it uses the temperature provided by the optional auxiliary temperature sensor (must be installed for inlet temperature monitoring). If this is also not available, it uses the heating/cooling mode assigned by Tracer SC or the DDC controller’s service tool.
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DDC Controls
156
When heat is added to the primary air, the air is considered reheated. Reheat can be either local
(integral to theVAV unit in the form of an electric coil or hot water coil) or remote (typically existing wall fin radiation, convector, etc.) or any combination of local and remote. The operating characteristics of the four basic types of VariTrane DDC terminal reheat are discussed.
Fan-Powered Terminal Units: On/Off Hot Water Reheat
One or two stages of on/off hot water reheat are available.Two position water valves complete the
HW reheat system and are either fully opened or fully closed. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature is 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the zone temperature is 1°F (0.56°C) or more below the active heating setpoint, and de-energizes when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-Powered Terminal Units: Proportional Hot Water Reheat
Proportional hot water reheat uses 3-wire floating-point-actuator technology. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5ºF (0.28ºC).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone setpoint is satisfied.
The water valve opens as space temperature drops below the heating setpoint. A separate reheat proportional-plus-integral control loop from that controlling airflow into the room is enforced.The
degree to which the hot water valve opens is dependent on both the degree that the space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already closed, the water valve fully closes when the zone temperature rises above the active heating setpoint by 0.5 °F (0.28 °C). When reheat is deenergized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: On/Off Electric Reheat
One or two stages of staged electric reheat are available. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature rises 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the space temperature is 1.0°F (0.56°C) or more below the active heating setpoint,
VAV-PRC012-EN
DDC Controls
and is de-energized when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: Pulse-Width Modulation of Electric Heat
One or two stages of pulse-width modulation of electric heat are available. Energizing for a portion of a three-minute time period modulates the electric heater. This allows exact load matching for energy efficient operation and optimum zone temperature control.The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
The amount of reheat supplied is dependent on both the degree that the space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already off, reheat de-energizes when the space temperature rises
0.5°F (0.28°C) above the active heating setpoint. The Stage 1 “on” time is proportional to the amount of reheat required. For example, when 50% of stage 1 capacity is required, reheat is on for
90 seconds and off for 90 seconds. When 75% of stage 1 capacity is required, reheat is on for 135 seconds and off for 45 seconds. When 100% of stage 1 capacity is required, reheat is on continuously.
Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.
For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage
2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimum airflow setpoint is activated. When reheat is de-energized, the cooling minimum airflow setpoint it activated.
Ventilation Control
Ventilation control enhances the usability ofTrane DDC controllers in more select applications that require measurement of outside air (ventilation). Ventilation control is designed for use with constant volume single-duct VAV units which modulate the primary damper and associated reheat to maintain an average constant discharge air temperature. The reheat is modulated to provide discharge air temperature consistent with AHU supply air temperature (typically 50º–60ºF).This is critical to ensure that ASHRAE Standard 62 Ventilation standards are attained, consistently maintained, and monitored. When connected to a Trane Building Automation System, trend logging, remote alarming, etc. is available. In fact, theTraneTracer SC control system can provide unmatched “peace of mind” by calling/paging the appropriate person(s) when specific alarms occur.
Flow Tracking Control
This enhanced VAV DDC controller feature allows two Trane VV550 controllers to coordinate modulation simultaneously. This allows a specific CFM offset to be maintained. The CFM offset provides pressurization control of an occupied space, while maintaining the comfort and energy savings of a VAV system. A flow tracking system in a given zone consists of a standard Space
Comfort Control VAV (see B)unit plus a single-duct, cooling-only, exhaust VAV unit (see C). As the supply VAV unit modulates the supply airflow through the air valve to maintain space comfort, the exhaust box modulates a similar amount to maintain the required CFM differential.This is a simple, reliable means of pressurization control, which meets the requirements of the majority of zone pressurization control applications. Typical applications include:
• School and University laboratories
• Industrial laboratories
VAV-PRC012-EN 157
DDC Controls
• Hospital operating rooms
• Hospital patient rooms
• Research and Development facilities
• And many more…
The CFM offset is assured and can be monitored and documented when connected to a Trane
Tracer™ SC Building Automation System. Flow Tracking Control is designed to meet most pressurization control projects. If an application calls for pressure control other than flow tracking, contact your local Trane Sales Office for technical support.
Figure 8.
How does it operate?
How Does It Operate?
Exhaust
Supply VAV
B
To other VAVs or
Main Control Panel
Communication link
A
Primary Air from Main
AHU
C
T
Occupied Space
Tracer™ Programmable BACnet Controller — Unit Control Module
The Tracer UC400 direct digital controller Unit Control Module (DDC-UCM) is a microprocessorbased terminal unit with non-volatile memory which provides accurate airflow and room temperature control ofTrane and non-Trane VAV air terminal units.Tracer UC400 provides a simple open protocol to allow integration of Trane VAV units and controls into other existing control systems.The UCM can operate in pressure-independent or pressure-dependent mode and uses a proportional plus integral control algorithm.
The controller monitors zone temperature setpoints, zone temperature and its rate of change and valve airflow (via flow ring differential pressure). The controller also accepts an auxiliary duct temperature sensor input or a supply air temperature value fromTracer SC. Staged electric heat, pulse width modulated electric heat, proportional hot water heat or on/off hot water heat control are provided when required. The control board operates using 24-VAC power. The Tracer UC400 is also a member of theTrane Integrated Comfort™ systems (ICS) family of products. When used with aTraneTracer™ SC or otherTrane controllers, zone grouping and unit diagnostic information can be obtained. Also part of ICS is the factory-commissioning of parameters specified by the engineer (see "Factory-Installed vs. Factory-Commissioned" in the Features and Benefits section for more details).
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Specifications
Supply Voltage
24 VAC, 50/60 Hz
Maximum VA Load
No Heat or Fan
8 VA (Board, Transducer, Zone Sensor, and Actuator)
Note: If using field-installed heat, 24 VAC transformer should be sized for additional load.
Output Ratings
Actuator Output:24 VAC at 12 VA
1st Stage Reheat:24 VAC at 12 VA
2nd Stage Reheat:24 VAC at 12 VA
3rd Stage Reheat:24 VAC at 12 VA
Binary Input
24 VAC, occupancy or generic.
Auxiliary Input
Can be configured for discharge or primary air temperature sensor.
Operating Environment
32 to 140°F, (0 to 60°C)
5% to 95% RH, Non-condensing
Storage Environment
-40 to 180°F (-40 to 82.2°C),
5% to 95%RH, Non-Condensing
Physical Dimensions
Width: 5.5" (139.7 mm)
Length: 4.5" (69.85 mm)
Height: 2.0" (44.45 mm)
Connections
1/4" (6.35 mm) Stab Connections
Communications
Tracer UC400– Space Comfort Control (SCC) profile with FTT-10 transceiver.
22 awg. unshielded level 4 communication wire.
Fan Control
Series fan: On unless unoccupied and min. flow has been released.
Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).
Heat Staging
Staged electric or hot water proportional or pulse-width modulation
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Trane LonMark DDC VAV Controller
Introduction
This LonMark™ certified controller uses the Space Comfort Controller (SCC) profile to exchange information over a LonTalk™ network. Networks with LonMark certified controllers provide the latest open protocol technology. Being LonMark certified guarantees that owners and end-users have the capability of addingTrane products to other “open” systems and relieves owners of the pressure and expense of being locked into a single DDC supplier.TheTrane VV550 VAV controller with VariTrane VAV units can be applied to more than just Trane systems. When a customer buys a Trane VAV unit with Trane DDC controller, they take advantage of:
• Factory-commissioned quality
• Knowing they have selected the most reliable VAV controllers in the industry
• Trane as a single source to solve any VAV equipment, or system-related issues
• The most educated and thorough factory service technicians in the controls industry
• Over 150 local parts centers throughout North America that can provide what you need, when you need it.
Don’t let your existing controls supplier lock you out of the most recognized name in VAV system control in the industry. Specify Trane open-protocol systems.
What are the new features of this controller? Read on to find out more.
General Features and Benefits
Assured Accuracy
• Proportional-plus-integral control loop algorithm for determining required airflow needed to control room temperature. Airflow is limited by active minimum and maximum airflow setpoints.
• Pressure-independent (PI) operation that automatically adjusts valve position to maintain required airflow. In certain low-flow situations or in cases where the flow measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode of operation.
• When combined with the patentedTrane Flow ring and pressure transducer, flow is repeatable to +/- 5% accuracy across the Pressure Independent (PI) flow range. (See Valve/Controller
Airflow Guidelines section).
• Improved 2-Point Air Balancing is available – Assures optimized flow-sensing accuracy across the operating range.This provides a more accurate airflow balancing method when compared to typical single-point flow correction air balancing.
• Analog input resolution of +/- 1/8°F within the comfort range maximizes zone temperature control yielding excellent comfort control.
Reliable Operation
• Built for life – Trane products are designed to stand the test of time, with a proven design life that exceeds 20 years.
• Fully factory tested – fully screened and configured at the factory. All features are tested including fan and reheat stage energization, air valve modulation, and controller inputs and outputs.
Safe Operation
• All components, including the controller, pressure transducer, transformer, etc. are mounted in a NEMA 1 sheet metal enclosure and are tested as an assembly to UL1995 standards. The result is a rugged and safe VAV, controller, and thus, overall unit.
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• When in PI-mode, EH is disabled when the sensed flow is below the minimum required.
• HW coilVAV units in ventilation flow control (VFC) have a Freeze protection algorithm to protect the water coil and the internal space from water damage.This is accomplished by driving the water valve to maximum position on alarm conditions.
System-Level Optimization
Trane controllers are designed to integrate into Trane Tracer Building Automation Systems and leverage clear and clean unit-controller related data for system level control decisions. Integrating a Trane VV550 controller into a Tracer Control System provides the next step in building system control.
Specifically, system-level decisions on how to operate all components can be made. Energy efficient optimization strategies like Static Pressure Optimization, Ventilation Reset, and CO
2
Demand-controlled Ventilation can be employed with the simple press of a button.The end-result is the most efficient and reliable building control system available.
Simplified Installation
Factory Commissioned Quality – All Trane DDC VAV controllers are factory-commissioned. This means that the DDC boards are powered and run-tested with your specific sequence parameters.
They are connected to a communication link to make sure that information and diagnostic data function properly. Before any VariTrane VAV unit ships they must pass a rigorous quality control procedure. You can be assured that a Trane VAV unit with Trane DDC VAV controls will work right out of the crate.
Zone sensor air balance – When applied to a Trane zone sensor with thumbwheel and on/cancel buttons, a balancing contractor can drive the primary air valve to maximum or minimum airflow from the sensor to determine the point of calibration to be used (maximum will result in optimum performance). The flow reading can then be calibrated from the sensor, without the use of additional service tools. (Non-LCD versions)
Tenant-Finish Heat Mode – In some office projects, the building is being constructed as tenants are being identified.Tenant-finish heat mode is designed for applications when a given floor has not been occupied.The main AHU system is used for heat and because the internal furnishings are not complete, the sensors have not been installed. In this case, the primary valve drives open using the heat of the main AHU to keep plumbing lines from freezing. When available, the operation of the VAV unit fan (series or parallel) remains unaffected.
Controller Flexibility
• 24 VAC binary input that can be configured as a generic input or as occupancy input. When the
DDC controller is operating with Tracer SC, the status of the input is provided to Tracer for its action. In stand-alone operation and when configured for an occupancy input, the input will control occupancy status of the DDC controller.
• Auxiliary temperature analog input configured for an auxiliary temperature sensor.The value of the input is used as status-only byTracer SC ifTracer SC is providing a supply air temperature to the DDC controller. Otherwise, the input will be used for determining heating/cooling control action of the VAV unit. When the auxiliary temperature sensor is located in the discharge of the unit, and attached to a Trane Tracer Building Automation System, additional test sequencing and reporting is available to maximize VAV system capabilities and simplify system commissioning.
• Dual-duct support with two DDC controllers. One DDC controller controls the cooling air valve and the other controller controls the heating air valve. With constant-volume sequences, the discharge air volume is held constant by controlling discharge air volume with the heating
Controller.
• LonMark certified performance ensures that a Trane VAV with controller will provide state-ofthe-art, consistent open communication protocol for integration with the industry’s latest (Non-
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Trane) building automation control systems, including Johnson Control, Andover, Siemans,
Honeywell, etc.
• CO
2 demand controlled ventilation enables a HVAC system to adjust ventilation flow based on critical zone, average CO
2 of specified zones, etc. Trane demand controlled ventilation strategies are pre-defined for simplified application and can be easily customized to meet the needs of a specific system.
Trane DDC VAV Controller Logic
Control Logic
Direct Digital Control (DDC) controllers are today’s industry standard. DDC controllers share system-level data to optimize system performance (including changing ventilation requirements, system static pressures, supply air temperatures, etc.). Variables available via a simple twistedshielded wire pair include occupied/unoccupied status, minimum and maximum airflow setpoints, zone temperature and temperature setpoints, air valve position, airflow cfm, fan status (on or off), fan operation mode (parallel or series), reheat status (on or off), VAV unit type, air valve size, temperature correction offsets, flow correction values, ventilation fraction, etc.
With the advent of LonMark open protocol, the most reliable VAV controller is now available for
ANY system. Gone are the days of being locked into a single supplier. Trane DDC controllers provideTrane-designed solid-state electronics intended specifically for VAV applications including:
1.
Space Temperature Control
2. Ventilation Flow Control (100% outside air applications)
6. Flow Tracking Space Pressurization Control (New feature)
Figure 9.
Flow sensor single vs. airflow delivery
5
1
4"
5" 6" 8" 10" 12" 14" 16"
0.1
162
0.01
10 100 1,000 10,000
Cfm
Note:
Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller
Airflow Guidelines” in each section for unit performance.
Space Temperature Control
Space temperature control applications are whereTrane emerged as an industry leader in quality and reliability. This did not occur overnight and has continued to improve as our controller and control logic has improved over time. STC employs controller logic designed to modulate the supply airstream and associated reheat (either local or remote) to exactly match the load requirements of the space.
Additionally, minimum and maximum airflow and specific controller sequence requirements are pre-programmed to ensure that appropriate ventilation standards are consistently maintained.
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When connected to aTraneTracer Building Automation System, trend logging, remote alarming, etc. are available to fully utilize the power and capabilities of your systems.
General Operation-Cooling
In cooling control action, the DDC controller matches primary airflow to cooling load. The DDC controller will automatically change over to heating control action if the supply air temperature is above a configured/editable setpoint. When the supply air temperature is less than 10 degrees below this setpoint, the controller will automatically switch to cooling control action. The DDC controller first chooses the Tracer™ SC -provided supply air temperature value to use for auto changeover. If this is not available, it uses the temperature provided by the optional auxiliary temperature sensor (must be installed for inlet temperature monitoring). If this is also not available, it uses the heating/cooling mode assigned by Tracer SC or the DDC controller’s service tool.
General Operation-Reheat
In heating control action, the DDC controller matches primary airflow to heating load. The DDC controller will automatically change over to heating control action if the supply air temperature is above a configured/editable setpoint. When the supply air temperature is less than 10 degrees below this setpoint, the controller will automatically switch to cooling control action. The DDC controller first chooses the Tracer-provided supply air temperature value to use for auto changeover. If this is not available, it uses the temperature provided by the optional auxiliary temperature sensor (must be installed for inlet temperature monitoring). If this is also not available, it uses the heating/cooling mode assigned by Tracer SC or the DDC controller’s service tool.
When heat is added to the primary air, the air is considered reheated. Reheat can be either local
(integral to theVAV unit in the form of an electric coil or hot water coil) or remote (typically existing wall fin radiation, convector, etc.) or any combination of local and remote. The operating characteristics of the four basic types of VariTrane™ DDC terminal reheat are discussed.
Fan-Powered Terminal Units: On/Off Hot Water Reheat
One or two stages of on/off hot water reheat are available.Two position water valves complete the
HW reheat system and are either fully opened or fully closed. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature is 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the zone temperature is 1°F (0.56°C) or more below the active heating setpoint, and de-energizes when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-Powered Terminal Units: Proportional Hot Water Reheat
Proportional hot water reheat uses 3-wire floating-point-actuator technology. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5ºF (0.28ºC).
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Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone setpoint is satisfied.
The water valve opens as space temperature drops below the heating setpoint. A separate reheat proportional-plus-integral control loop from that controlling airflow into the room is enforced.The
degree to which the hot water valve opens is dependent on both the degree that the space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already closed, the water valve fully closes when the zone temperature rises above the active heating setpoint by 0.5 °F (0.28 °C). When reheat is deenergized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: On/Off Electric Reheat
One or two stages of staged electric reheat are available. The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
Stage 1 energizes when the space temperature is below the active heating setpoint, and is deenergized when the space temperature rises 0.5°F (0.28°C) above the active heating setpoint. Stage
2 energizes when the space temperature is 1.0°F (0.56°C) or more below the active heating setpoint, and is de-energized when the space temperature is 0.5°F (0.28°C) below the active heating setpoint.
When reheat is de-energized, the cooling minimum airflow setpoint is activated.
Fan-powered Terminal Units: Pulse-Width Modulation of Electric Heat
One or two stages of pulse-width modulation of electric heat are available. Energizing for a portion of a three-minute time period modulates the electric heater. This allows exact load matching for energy efficient operation and optimum zone temperature control.The heating minimum airflow setpoint is enforced during reheat.
On parallel fan-powered units, the fan is energized upon a call for heating.The parallel fan is turned off when the space temperature rises above the fan on/off point (active heating setpoint plus fan offset) plus 0.5°F (0.28°C).
Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, fan is energized upon a call for heating or cooling and de-energized when unoccupied zone set point is satisfied.
The amount of reheat supplied is dependent on both the degree that the space temperature is below the active heating setpoint and the time that the space temperature has been below the active heating setpoint. If not already off, reheat de-energizes when the space temperature rises
0.5°F (0.28°C) above the active heating setpoint. The Stage 1 “on” time is proportional to the amount of reheat required. For example, when 50% of stage 1 capacity is required, reheat is on for
90 seconds and off for 90 seconds. When 75% of stage 1 capacity is required, reheat is on for 135 seconds and off for 45 seconds. When 100% of stage 1 capacity is required, reheat is on continuously.
Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always energized.
For example, when 75% of unit capacity is required, stage 1 is energized continuously, and stage
2 is on for 90 seconds and off for 90 seconds. When reheat is de-energized, the cooling minimum airflow setpoint is activated. When reheat is de-energized, the cooling minimum airflow setpoint it activated.
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Ventilation Control
Ventilation control enhances the usability ofTrane DDC controllers in more select applications that require measurement of outside air (ventilation). Ventilation control is designed for use with constant volume single-duct VAV units which modulate the primary damper and associated reheat to maintain an average constant discharge air temperature. The reheat is modulated to provide discharge air temperature consistent with AHU supply air temperature (typically 50º–60ºF).This is critical to ensure that ASHRAE Standard 62 Ventilation standards are attained, consistently maintained, and monitored. When connected to a Trane Building Automation System, trend logging, remote alarming, etc. is available. In fact, the Trane Tracer Control System can provide unmatched “peace of mind” by calling/paging the appropriate person(s) when specific alarms occur.
Flow Tracking Control
This enhanced VAV DDC controller feature allows two Trane VV550 controllers to coordinate modulation simultaneously. This allows a specific CFM offset to be maintained. The CFM offset provides pressurization control of an occupied space, while maintaining the comfort and energy savings of a VAV system. A flow tracking system in a given zone consists of a standard Space
Comfort Control VAV (see B)unit plus a single-duct, cooling-only, exhaust VAV unit (see C). As the supply VAV unit modulates the supply airflow through the air valve to maintain space comfort, the exhaust box modulates a similar amount to maintain the required CFM differential.This is a simple, reliable means of pressurization control, which meets the requirements of the majority of zone pressurization control applications. Typical applications include:
• School and University laboratories
• Industrial laboratories
• Hospital operating rooms
• Hospital patient rooms
• Research and Development facilities
• And many more…
The CFM offset is assured and can be monitored and documented when connected to a Trane
Tracer Building Automation System. FlowTracking Control is designed to meet most pressurization control projects. If an application calls for pressure control other than flow tracking, contact your local Trane Sales Office for technical support.
Figure 10. How does it operate?
Exhaust
Communication link
A
Supply VAV
B
To other VAVs or
Main Control Panel
Primary Air from Main
AHU
C
T
Occupied Space
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LonMark™ Direct Digital Controller—Unit Control Module
TheTrane LonMark direct digital controller Unit Control Module (DDC-UCM) is a microprocessor-based terminal unit with non-volatile memory which provides accurate airflow and room temperature control of Trane and non-
Trane VAV air terminal units. LonMark provides a simple open protocol to allow integration ofTrane VAV units and controls into other existing control systems. The UCM can operate in pressure-independent or pressuredependent mode and uses a proportional plus integral control algorithm.
The controller monitors zone temperature setpoints, zone temperature and its rate of change and valve airflow (via flow ring differential pressure). The controller also accepts an auxiliary duct temperature sensor input or a supply air temperature value fromTracer™ SC. Staged electric heat, pulse width modulated electric heat, proportional hot water heat or on/off hot water heat control are provided when required.The control board operates using 24-VAC power.TheTrane LonMark
DDC-UCM is also a member of the Trane Integrated Comfort™ systems (ICS) family of products.
When used with aTraneTracer™ SC or otherTrane controllers, zone grouping and unit diagnostic information can be obtained. Also part of ICS is the factory-commissioning of parameters specified by the engineer (see "Factory-Installed vs. Factory-Commissioned" in the Features and Benefits section for more details).
Note: Trane LonMark DDC-UCM controllers can also take advantage of factory-commissioned
quality on non-Trane systems through LonMark open protocol.
Specifications
Supply Voltage
24 VAC, 50/60 Hz
Maximum VA Load
No Heat or Fan
8 VA (Board, Transducer, Zone Sensor, and Actuator)
Note: If using field-installed heat, 24 VAC transformer should be sized for additional load.
Output Ratings
Actuator Output:24 VAC at 12 VA
1st Stage Reheat:24 VAC at 12 VA
2nd Stage Reheat:24 VAC at 12 VA
3rd Stage Reheat:24 VAC at 12 VA
Binary Input
24 VAC, occupancy or generic.
Auxiliary Input
Can be configured for discharge or primary air temperature sensor.
Operating Environment
32 to 140°F, (0 to 60°C)
5% to 95% RH, Non-condensing
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Storage Environment
-40 to 180°F (-40 to 82.2°C),
5% to 95%RH, Non-Condensing
Physical Dimensions
Width: 5.5" (139.7 mm)
Length: 4.5" (69.85 mm)
Height: 2.0" (44.45 mm)
Connections
1/4" (6.35 mm) Stab Connections
Communications
LonMark – Space Comfort Control (SCC) profile with FTT-10 transceiver.
22 awg. unshielded level 4 communication wire.
Fan Control
Series fan: On unless unoccupied and min. flow has been released.
Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).
Heat Staging
Staged electric or hot water proportional or pulse-width modulation
Table 136. Input listing
Input description
Space temperature
Input
nviSpaceTemp
Setpoint nviSetpoint
Occupancy, schedule nviOccSchedule
Occupancy, manual command
Occupancy sensor nviOccManCmd nviOccSensor
Application mode
Heat/cool mode input
Fan speed command
Auxiliary heat enable nviApplicMode nviHeatCool nviFanSpeedCmd nviAuxHeatEnable
Valve override
Flow override
Emergency override
Source temperature
Space CO2
Clear alarms/diagnostics
Air flow setpoint input
(a) Part of the node object nviValveOverride nviFlowOverride nviEmergOverride nviSourceTemp nviSpaceCO2 nviRequest
(a) nviAirFlowSetpt
SNVT type
SNVT_temp_p
SNVT_temp_p
SNVT_tod_event
SNVT_occupancy
SNVT_occupancy
SNVT_hvac_mode
SNVT_hvac_mode
SNVT_switch
SNVT_switch
SNVT_hvac_overid
SNVT_hvac_overid
SNVT_hvac_emerg
SNVT_temp_p
SNVT_ppm
SNVT_obj_request
SNVT_flow
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Table 137. Output listing
Output description
Space temperature
Unit status, mode
Effective setpoint
Effective occupancy
Heat cool mode
Setpoint
Discharge air temperature
Space CO2
Effective air flow setpoint
Air flow
File table address
Object status
Alarm message
(a) Part of the node object.
Output
nvoSpaceTemp nvoUnitStatus nvoEffectSetpt nvoEffectOccup nvoHeatCool nvoSetpoint nvoDischAirTemp nvoSpaceCO2 nvoEffectFlowSP nvoAirFlow nvoFileDirectory
(a) nvoStatus
nvoAlarmMessage
SNVT type
SNVT_temp_p
SNVT_hvac_status
SNVT_temp_p
SNVT_occupancy
SNVT_hvac_mode
SNVT_temp_p
SNVT_temp_p
SNVT_ppm
SNVT_flow
SNVT_flow
SNVT_address
SNVT_obj_status
SNVT_str_asc
provides an input listing for Tracer VV550/551 VAV controllers, and
provides an output listing for Tracer VV550/551 VAV controllers.
provides the configuration properties for the controller. The content of the lists conforms to both the
LonMark SCC functional profile 8500 and the LonMark node object.
Table 138. Configuration properties
Configuration property description
Send heartbeat
Occ temperature setpoints
Minimum send time
Receive heartbeat
Location label
Local bypass time
Manual override time
Space CO2 limit
Nominal air flow
Air flow measurement gain
Minimum air flow
Maximum air flow
Minimum air flow for heat
Maximum air flow for heat
Minimum flow for standby
Firmware major version
Firmware minor version
Flow offset for tracking applications
Local heating minimum air flow
Minimum flow for standby heat
(a) Part of the node object.
Configuration property
nciSndHrtBt nciSetpoints nciMinOutTm nciRecHrtBt nciLocation nciBypassTime nciManualTime nciSpaceCO2Lim nciNomFlow nciFlowGain nciMinFlow nciMaxFlow nciMinFlowHeat nciMaxFlowHeat nciMinFlowStdby nciDevMajVer
(a)
nciFlowOffset nciMinFlowUnitHt nciMnFlowStbyHt
SNVT type
SNVT_time_sec
SNVT_temp_setpt
SNVT_time_sec
SNVT_time_sec
SNVT_str_asc
SNVT_time_min
SNVT_time_min
SNVT_ppm
SNVT_flow
SNVT_multiplier
SNVT_flow
SNVT_flow
SNVT_flow
SNVT_flow
SNVT_flow n/a n/a
SNVT_flow_f
SNVT_flow
SVNT_flow
SCPT reference
SCPTmaxSendTime (49)
SCPTsetPnts (60)
SCPTminSendTime (52)
SCPTmaxRcvTime (48)
SCPTlocation (17)
SCPTbypassTime (34)
SCPTmanOverTime (35)
SCPTlimitCO2 (42)
SCPTnomAirFlow (57)
SCPTsensConstVAV (67)
SCPTminFlow (54)
SCPTmaxFlow (51)
SCPTminFlowHeat (55)
SCPTmaxFlowHeat (37)
SCPTminFlowStby (56)
SCPTdevMajVer (165)
SCPTdevMinVer (166)
SCPToffsetFlow (265)
SCPTminFlowUnitHeat (270)
SCPTminFlowStbyHeat(263)
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Direct Digital Controller—Unit Control Module
The Trane direct digital controller Unit Control
Module (DDC-UCM) is a microprocessor-based terminal unit with non-volatile memory which provides accurate airflow and room temperature control of Trane VAV air terminal units. The UCM can operate in a pressure-independent or a pressuredependent mode and uses a proportional plus integral control algorithm. The controller monitors zone temperature setpoints, zone temperature and its rate of change and valve airflow (via flow ring differential pressure).
The controller also accepts an auxiliary duct temperature sensor input or a supply air temperature value fromTracer™ SC. Staged electric heat, pulse width modulated electric heat, proportional hot water heat or on/off hot water heat control are provided when required.The control board operates using 24-VAC power.TheTrane DDC-UCM is a member of theTrane Integrated Comfort™ systems
(ICS) family of products. When used with a Trane Tracer Building Automation System or other
Trane controllers, zone grouping and unit diagnostic information can be obtained. Also part of ICS is the factory-commissioning of parameters specified by the engineer (see "Factory-Installed vs.
Factory-Commissioned" in the Features and Benefits section for more details).
Specifications
Supply Voltage
24 VAC, 50/60 Hz
Maximum VA Load
No Heat or Fan
12 VA (Board, Transducer, Zone Sensor, and Actuator)
Note: If using field-installed heat, 24 VAC transformer should be sized for additional load.
Output Ratings
Actuator Output: 24 VAC at 12 VA
1st Stage Reheat: 24 VAC at 12 VA
2nd Stage Reheat: 24 VAC at 12 VA
3rd Stage Reheat: 24 VAC at 12 VA
Binary Input
24 VAC
Auxiliary Input
Can be configured for an optional 2–10 VDC CO
2 sensor, or auxiliary temperature sensor.
Operating Environment:
32 to 140°F, (0 to 60°C)
5% to 95% RH, Non-condensing
Storage Environment
-40 to 180°F (-40 to 82.2°C),
5% to 95%RH, Non-Condensing
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Physical Dimensions
Width: 5.5" (139.7 mm)
Length: 2.8" (69.85 mm)
Height: 1.8" (44.45 mm)
Connections
1/4" (6.35 mm) Stab Connections
Communications
RS-485; Stranded wire, twisted pair, shielded, copper conductor only, 18–20 awg
Fan Control
• Series fan: On unless unoccupied and min. flow has been released.
• Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).
Heat Staging
Staged electric or hot water proportional or pulse-width modulation
Wireless Comm Interface (WCI)
WCI controller
The Trane® Wireless Comm Interface (WCI) enables wireless communication between system controls, unit controls, and wireless sensors for the new generation of Trane control products.The WCI replaces the need for communication wire in all system applications.
Note: See BAS-SVX40A-EN, Installation, Operation and
Maintenance, Wireless Comm for more information.
Quantity of WCIs per Network.
Each Trane wireless network can have a total of 31 WCIs (30 member WCIs plus 1 coordinator WCI). Each network requires one WCI to function as network coordinator.
Quantity of Networks per Tracer SC.
A Tracer SC can support up to 8 wireless networks.
Automatic Network Formation.
When a WCI is connected to aTracer SC, it is auto-assigned as the coordinator. To enable the coordinator, Tracer SC must be configured for wireless communication. The coordinator WCI opens the network to allow all WCIs having matching addresses to automatically join the network.
If noTracer SC is present, a centrally located WCI must be designated to act as the coordinator.You
can manually set the coordinator WCI so all WCIs having matching addresses automatically join the network.
Wireless Zone Sensors.
The WCI also communicates with Trane wireless zone sensors, eliminating the need for analog receivers.
Wired Zone Sensors.
Systems using Wireless Comm can also use wired zone sensors.
170 VAV-PRC012-EN
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Dimensions
2.896 in (73.55 mm)
0.118 in
(3.00 mm)
1.419 in (36.03 mm)
0.650 in (16.50 mm)
2.62 in (66.55 mm)
3.385 in (86.0 mm)
4.677 in (118.8 mm)
2.480 in (63.0 mm)
R0.71 in
(R1.80 mm) TYP
0.236 in
(6.0 mm)
1.344 in (34.14 mm)
Specifications
Operating Temperature
-40 to 158ºF (-40 to 70ºC)
Storage temperature
-40 to 185ºF (-40 to 85°C)
Storage and operating humidity range
5% to 95% relative humidity (RH), non-condensing
Voltage
24 Vac/Vdc nominal ± 10%. If using 24 Vac, polarity must be maintained.
Receiver power consumption
<2.5 VA
Housing material
Polycarbonate/ABS (suitable for plenum mounting), UV protected, UL 94: 5 VA flammability rating
Mounting
3.2 in (83 mm) with 2 supplied mounting screws
Range
Open range: 2,500 ft (762 m) with packet error rate of 2%
Indoor: Typical range is 200 ft (61 mm); actual range is dependent on the environment. See BAS-
SVX55 for more detail.
Note: Range values are estimated transmission distances for satisfactory operation. Actual
distance is job specific and must be determined during site evaluation. Placement of WCI is critical to proper system operation. In most general office space installations, distance is
VAV-PRC012-EN 171
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not the limiting factor for proper signal quality. Signal quality is ffected by walls, barriers, and general clutter. For more information os available at http://www.trane.com.
Output power
North America: 100 mW
Radio frequency
2.4 GHz (IEEE Std 802.15.4-2003 compliant) (2405–2480 MHz, 5 MHz spacing)
Radio channels
16
Address range
Group 0–8, Network 1–9
Mounting
Fits a standard 2 in. by 4 in. junction box (vertical mount only). Mounting holes are spaced 3.2 in.
(83 mm) apart on vertical center line. Includes mounting screws for junction box or wall anchors for sheet-rock walls. Overall dimensions: 2.9 in. (74 mm) by 4.7 in. (119 mm)
Wireless protocol
ZigBee PRO—ZigBee Building Automation Profile, ANSI/ASHRAE Standard 135-2008 Addendum q (BACnet™/ZigBee)
Wireless Receiver/Wireless Zone Sensor
The wireless zone sensor system eliminates the wiring problems associated with VAV temperature sensors. It provides the flexibility to move zone sensors after the occupants have revised the space floor plan layout. The zone sensor houses the space temperature sensor, local setpoint adjustment thumbwheel, OCCUPIED/UNOCCUPIED button, battery life, signal strength indicators, and spread spectrum transmitter.
The spread spectrum receiver/translator can be field or factory installed and functions as a communication translator between spread spectrum radio communications and the VAV communications link.
Specifications
Power Requirements
Receiver: 24 V nominal AC/DC ± 10% < 1VA
Zone Sensor: (2) AA lithium batteries
Sensor Operating Environments
32 to 122°F, (0 to 50°C); 5 to 95%RH, Non-condensing
Receiver Operating Environments
-40 to 158°F, (-40 to 70°C); 5 to 95%RH, Non-condensing
172 VAV-PRC012-EN
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Storage Environment—Sensor/Receiver
-40 to 185°F, (-40 to 85°C); 5 to 95%RH, Non-condensing
Mounting
Receiver: Suitable for mounting above or below ceiling grid. Requires 24V power. Factory installed receiver comes mounted to the VAV unit with power provided by associated unit controller transformer. Field installed option provided with associated wire harness for similar power and communication connection.
Sensor: Mounts to a 2x4 handi-box or directly to the wall by attaching the backplate and then snapping the sensor body into place.
Dimensions
Enclosure:
Height:
Width:
Depth:
Enclosure:
Height:
Width:
Depth:
Receiver/Translator
Plastic
4.75" (120.6 mm)
2.90" (73.5 mm)
1.08" (27.5 mm)
Sensor/Transmitter
Plastic
4.78" (121.4 mm)
2.90" (73.5 mm)
1.08" (27.5 mm)
DDC Zone Sensor
The DDC zone sensor is used in conjunction with the
Trane direct digital controller to sense the space temperature and to allow for user adjustment of the zone setpoint. Models with external zone setpoint adjustments and occupied mode override pushbuttons are available.
Specifications
Thermistor Resistance Rating
10,000 Ohms at 77°F (25°C)
Setpoint Resistance Rating
Setpoint potentiometer is calibrated to produce 500 Ohms at a setting of 70°F (21.11°C)
Electrical Connections
Terminal Block – Pressure Connections
Communications Jack – WE-616 (available for field installation)
Physical Dimensions
Width: 2.75" (69.85 mm)
Height: 4.5" (114.3 mm)
Depth: 1.0" (25.4 mm)
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CO
2
Wall Sensor and Duct CO
2
Sensor
Figure 11. CO
2 wall sensor (L) and duct CO
2 sensor (R)
Specifications
The wall- and duct-mounted carbon dioxide (CO
2
) sensors are designed for use with Trane DDC/
UCM control systems. Installation is made simple by attachment directly to the DDC/ UCM controller.This allows the existing communication link to be used to send CO
2 level Trane control system.
data to the higher-
Wall-mounted sensors can monitor individual zones, and the duct-mounted sensor is ideal for monitoring return air of a given unit. Long-term stability and reliability are assured with advanced silicon based Non-Dispersive Infrared (NDIR) technology.
When connected to a building automation system with the appropriate ventilation equipment, the
Trane CO
2 sensors measure and record carbon dioxide in parts-per-million (ppm) in occupied building spaces. These carbon dioxide measurements are typically used to identify underventilated building zones and to override outdoor airflow beyond design ventilation rates if the CO
2 exceeds acceptable levels.
Measuring Range
0–2000 parts per million (ppm)
Accuracy at 77°F (25°C)
< ± (40 ppm CO
2
+ 3% of reading)
(Wall only)
< ± (30 ppm CO
2
+ 3% of reading)
Recommended calibration interval
5 years
Response Time
1 minute (0–63%)
Operating Temperature
59 to 95°F (15 to 35°C) (Wall only)
23 to 113°F (-5 to 45°C)
Storage Temperature
-4 to 158°F (-20 to 70°C)
Humidity Range
0–85% relative humidity (RH)
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Output Signal (jumper selectable)
4-20 mA, 0–20 mA,
0–10 VDC
Resolution of Analog Outputs
10 ppm CO
2
Power Supply
Nominal 24 VAC
Power Consumption
<5 VA
Housing Material
ABS plastic
Dimensions
4 1/4" x 3 1/8" x 1 7/16" (Wall only)
(108 mm x 80 mm x 36 mm) (Wall only)
3 1/8" x 3 1/8" x 7 ¾"
(80 mm x 80 mm x 200 mm)
DDC Controls
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DDC Zone Sensor with LCD
The DDC zone sensor with LCD has the look and functionality of the standard Trane DDC zone sensor but has a LCD display. The sensor includes setpoint adjustment, the display of the ambient temperature, a communication jack, and occupied mode override pushbuttons. Also, it can be configured in the field for either a Fahrenheit or Celsius display, a continuous display of the setpoint and the offset of displayed temperatures.
Specifications
Thermistor Resistance Rating
10,000 Ohms at 77°F (25 o
C)
Setpoint Resistance Rating
Setpoint potentiometer is calibrated to produce 500 Ohms at a setting of 70 o
F (21.11
o
C)
Temperature Range
Displays 40 to 99 o
F (5 to 35 o
C)
With Setpoints 50 to 90 o
F (10 to 32 o
C)
Electrical Connections
Terminal Block – Pressure Connections
Communication Jack – WE – 616
4 VA maximum power input.
Physical Dimensions
Width: 2.8" (71.12 mm)
Length: 4.5" (114.3 mm)
Height: 1.1" (27.94 mm)
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Zone Occupancy Sensor
The zone occupancy sensor is ideal for spaces with intermittent occupancy.
It is connected to the Trane DDC UCM and allows the zone to shift to unoccupied setpoints for energy savings when movement is not detected in the space.
The zone occupancy sensor has a multi-cell, multi-tier lens with a maximum field of view of 360°.The maximum coverage area of the sensor is 1200 square feet with a maximum radius of 22 feet from the sensor when mounted at 8 feet above the floor.
Sensor ships with 30-minute time delay pre-set from the factory.Time delay and sensitivity can be field-adjusted.
Specifications
Power Supply
24 VAC or 24 VDC, ± 10%
Maximum VA Load
0.88 VA @ 24 VAC,
0.72 VA @ 24 VDC
Isolated Relay Rating
1 A @ 24 VAC or 24 VDC
Operating Temperature
32 to 131°F (0 to 55°C)
Storage Temperature
-22 to 176°F (-30 to 80°C)
Humidity Range
0 to 95% non-condensing
Effective Coverage Area
1200 sq ft
Effective Coverage Radius
22 feet
Housing Material
ABS Plastic
Dimensions
3.3" dia. x 2.2" deep (85 mm x 56 mm). Protrudes 0.36" (9 mm) from ceiling when installed.
VAV-PRC012-EN 177
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Factory or Field Wired Auxiliary Temperature Sensor
The auxiliary temperature sensor is used in conjunction with theTrane DDC controller to sense duct temperature. When the DDC controller is used with a Building Automation System, the sensor temperature is reported as status only. When the DDC control is used as stand alone configuration and the sensor is placed in the supply air duct, the sensor determines the control action of the UCM in a heat/cool changeover system.
When factory mounted, the sensor is terminated. If sensor is field mounted, it is shipped loose and is terminated in the field.
Specifications
Control Relay
Sensing Element
Thermistor 10,000 Ohms @ 77°F (25°C)
Operating Environment
-4 to 221°F (-20 to 105°C), 5%-95%RH
Non-Condensing
Wiring Connection
8 ft 18 awg
Sleeving for wire leads is acyrlic #5 awg grade C rated @ 155°C
Probe Dimensions
3.4" long x 5/16" diameter
(86 mm x 7.9 mm diameter)
Mounting
In any position on duct.
Mount the sensor to the duct using
#10 x ¾" (19.05 mm) sheet metal screws.
The control relay is an output device used to provide on/off control of electrical loads.The SPST relay also will isolate the electrical load from the direct digital controller.
Specifications
Coil Rating
24 VAC, 50/60 Hz, pull in at 85%,
4 VA inrush, 3 VA sealed, Class B insulation
Contact Rating
120 VAC, 12 FLA , 60 LRA, 18A Resistive Pilot Duty – 125 VA/3A
277 VAC, 7 FLA, 42 LRA, 18A Resistive Pilot Duty – 277 VA/3A
347 VAC, 25 FLA, 50 LRA, 30A Resistive
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Two-Position Water Valve
Two-position hot water valves are used with Trane DDC/UCM controls and analog electronic controls. Valve actuation is by a hysteresis synchronous motor.
All valves are field-installed and convertible from three-way to two-way by means of an included cap.
Specifications
Valve Design
Body: Brass
Cover: Aluminum
Case: Stainless Steel
Stem: Brass, Hard Chrome Plate
“O” Ring Seals: Viton
Operating Paddle: Buna N
Valve Body Ratings
UL 873 Listed File E27743
Plenum Rated CSA C22.2 No. 139
Certified, File LR85083, Class 3221 01
Temperature Limits
200°F (93.33°C) Fluid
104°F (40°C) Ambient
Maximum Operating Pressure
300 psi (2069 kPa)
Electrical Rating
Motor Voltage – 24 VAC, 50/60 Hz
Power Consumption – 7.0 VA of 24 VAC
Valve Offerings
All valves are spring returned.
1.17 Cv – ½" (12.7 mm) O.D. NPT
3.0 Cv – ¾" (19.1 mm) O.D. NPT
6.4 Cv – 1" (25.4 mm) O.D. NPT
Cv offered (Close-off Pressure):
1.1730 psi (207 kPa)
3.014.5 psi (100 kPa)
6.49 psi (62 kPa)
VAV-PRC012-EN 179
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Proportional Water Valve
The proportional water valve is used to provide accurate control of a hot water heating coil to help maintain a zone temperature setpoint.The valve is a ball design and comes in available in four different flow capacities for proper controllability. The valves are field-adjustable for use as a two- or three-way configuration.The valves ship in a two-way configuration with a plug that is installed loose in the bypass port. Conversion to three-way operation is accomplished by removing the plug from the "B" port.The valve actuator contains a three-wire synchronous motor.
The direct digital controller uses a time-based signal to drive the motor to its proper position.When
power is removed from the valve, it remains in its last controlled position.
Specifications
Valve Design:
Ball valve construction designed for chilled/hot water or water with up to 50% glycol
Temperature Limits
32 to 201°F (0 to 94°C) Fluid
23 to 122°F (-5 to 50°C) Ambient
Rated Body Pressure
300 psi (2.06 mPa)
Maximum Actuator Close-Off Pressure
60 psi (0.4 mPa)
Electrical Rating
Motor Voltage – 24 VAC, 50/60 Hz
Power Consumption – 3.0 VA at 24 VAC
Valve Offerings
All valves are proportional control with ½" (12.7 mm) O.D. NPT connections
Cv offered:
0.7
2.7
6.6
8.0
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Differential Pressure Transducer
The differential pressure transducer is used in conjunction with the Trane direct digital controller and analog electronic controller. The pressure transducer measures the difference between the high-pressure and lowpressure ports of the Trane flow ring. The transducer is self-adjusting to changes in environmental temperature and humidity.
Specifications
Input Pressure Range
0.0 to 5.0 in. wg
(Maximum input pressure 5 psig)
Operating Environment
32 to 140° F, (0 to 60°C)
5% to 95% RH, Non-Condensing
Storage Environment
-40 to 180° F, (-40 to 82.2°C)
5% to 95%RH, Non-condensing
Electrical Connections
V in
= 5.0 VDC nominal
(4.75 to 5.25 VDC acceptable)
Current Draw = 5 mA maximum
Null Voltage = 0.250 VDC ± 0.06 VDC
Span = 3.75 VDC ± 0.08 VDC
Note: Null and Span are ratiometric with V
in
Physical Dimensions
Width: 2.5" (63.5 mm)
Length: 3.0" (76.2 mm)
Height: 1.5" (38.1 mm)
Pressure Connections
1/8" (3.175 mm) barbed tubing connections
VAV-PRC012-EN 181
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Transformers
The transformer converts primary power supply voltages to the voltage required by the direct digital controller and analog. The transformer also serves to isolate the controller from other controllers which may be connected to the same power source.
Specifications
Primary Voltage
120 VAC
208 VAC
240 VAC
277 VAC
347 VAC
480 VAC
575 VAC
Secondary Voltage
24 VAC
Power Rating
50 VA
Physical Dimensions
For all voltages:
The transformers will be no larger than the following dimensions:
Width: 2.63" (66.7 mm)
Length: 2.50" (63.5 mm)
Height: 2.30" (58.4 mm)
182 VAV-PRC012-EN
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Trane Actuator – 90 Second at 60 Hz Drive Time
This actuator is used with DDC controls and retrofit kits. It is available with a 3-wire floating-point control device. It is a direct-coupled over the shaft (minimum shaft length of 2.1"), enabling it to be mounted directly to the damper shaft without the need for connecting linkage.The actuator has an external manual gear release to allow manual positioning of the damper when the actuator is not powered. The actuator is Underwriters Laboratories Standard 873 and Canadian Standards
Association Class 3221 02 certified as meeting correct safety requirements and recognized industry standards.
Specifications
Actuator Design
3-wire, 24-AC floating-point control. Non-spring return.
Actuator Housing
Housing type-NEMA 1
Rotation Range
90° clockwise or counterclockwise
Electrical Rating
Power Supply –24 VAC (20 to 30 VAC) at 50/60 Hz
Power Consumption – 1.8 VA maximum, Class 2
Electrical Connection
Box Lug Terminals
Manual Override
External clutch release lever
Shaft Requirement
½" round
2.1" length
Humidity
5% to 95% RH, Non-Condensing
Temperature Rating
Ambient operating: 32 to 125°F
(0 to 52°C)
Shipping and storage: -20 to 130°F
(-29 to 66°C)
Torque
Running: 35 in.-lb (4 N-m)
Breakaway: 35 in.-lb (4 N-m) minimum
Stall: 60 in.-lb (4.5 N-m) minimum
VAV-PRC012-EN 183
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Belimo Actuator – 95 Second Drive Time
This actuator is used with DDC controls and retrofit kits. It is available with a 3-wire floating-point control device. it is a direct-coupled over the shaft enabling it to be mounted directly to the damper shaft without the need for connecting linkage. The actuator has an external manual gear release to allow manual positioning of the damper. The actuator is UL listed and caries the CE mark.
Specifications
Actuator Design
3-wire, 24-AC floating-point control. Brushless DC motor with internal control electronics and constant drive time.
Rotation Range
95° clockwise or counterclockwise
Electrical Rating
Power Supply –24 VAC/DC
Power Consumption – 2VA, 1.5W
Electrical Connection
Three box-type terminals for bare wire connections.
Manual Override
External clutch release lever.
Shaft Requirement
½" round
2.1" length
Humidity
5% to 95% Non-Condensing
Temperature Rating
Ambient operating: 32 to 125°F (0 to 52°C)
Shipping and storage: -20 to 130°F(-29 to 66°C)
Torque
45 in.-lb (5 N-m)
184 VAV-PRC012-EN
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Trane Spring Return Actuator
This actuator is used with DDC controls and is a floating-point control device. It is direct-coupled over the shaft (minimum shaft length of 2.1"), enabling it to be mounted directly to the damper shaft without the need for connecting linkage. The actuator is Underwriters Laboratories Standard
60730 and Canadian Standards Association C22.2 No. 24-93 certified as meeting correct safety requirements and recognized industry standards.
Specifications
Actuator Design
24-VAC, floating-point control. Spring return
Actuator Housing
Housing Type-NEMA IP54
Rotation Range
Adjustable from 0° to 90° at 5° intervals, clockwise or counterclockwise
Electrical Rating
Power Supply – 24 VAC (19.2 to 28.8 VAC) at 50/60 Hz
Power Consumption – 4VA holding, 5VA running maximum, Class 2
Electrical Connection
6-pin female connector for Trane UCM (for Trane DDC controls)
Manual Override
Manual override key provided
Shaft requirement:
¼" to ¾" round
2.1" length
Humidity
95% RH, Non-Condensing
Temperature Rating
Ambient operating: 32 to 130°F
(0 to 54°C)
Shipping and storage: -40 to 158°F
(-40 to 70°C)
Torque
62 in.-lbs (7N-m)
VAV-PRC012-EN 185
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VariTrane DDC Retrofit Kit
The retrofit kit provides the system advantages of VariTrane DDC controls to building owners for existing systems. The kit can be applied when converting from pneumatic or analog controlled systems to a DDC controlled system.The kit may be used on existing single-duct units with hot water and electric reheat (three stages), dual-duct units, and all fan-powered units (both series and parallel) with hot water and electric reheat (two stages).
A VariTrane DDC-UCM, an electronic differential pressure transducer, and a six-pin connector with wiring for an actuator, make up the assembly of the retrofit kit. All are housed inside a metal enclosure. For maximum flexibility, the kit is available with one of two actuators or without an actuator. If a kit is ordered without an actuator, ensure the actuator used has 24VAC three-wire floating control. Other accessories are available with the retrofit kit which include zone sensors, flow bars (used with units without a flow sensor), power transformers, control relays, and E/P solenoid valves.
Retrofit Kit Actuator
This actuator is available with the DDC Retrofit Kit and is a 3-terminal, floating-point control device. It is direct-coupled over the damper shaft so there is no need for connecting linkage.The actuator has an external manual gear release to allow manual positioning of the damper when the actuator is not powered. A three-foot plenum-rated cable with bare ends will be sent separately.The actuator is listed under Underwriters Laboratories Standard
873, CSA 22.2 No. 24 certified, and CE manufactured per Quality Standard
SO9001.
Specifications
Actuator Design
on-off/floating-point
Actuator housing
Housing Type-NEMA type 1
Housing Material Rating- UL 94-5V
Angle of Rotation
Max 95º, adjustable with mechanical stops
Electrical Rating
Power Supply – 24 VAC ± 20% 50/60 Hz 24 VDC ± 10%
Power Consumption – 2VA, 1.5W
Manual Override
External push button
186 VAV-PRC012-EN
Humidity
5% to 95% RH, Non-Condensing
Ambient Temperature
-22 to 122°F (-30C to 50°C)
Storage Environment
-40 to 176°F (-40 to 80°C)
Torque
45 in.-lb (5N-m)
Running Time
95 sec. for 0 to 45 in-lb
Noise Rating
Less than 35 dB (A)
Weight
1.2 lbs (0.55 kg)
Silicon-Controlled Rectifier (SCR)
• Microprocessor based burst-fire controller / SSR
• Low-voltage control
• Output status indicator
• 0-100% Control Range
• Synchronized triggering output (P3)
• 20 AC Cycles Base Period
Specifications
Input Specifications
Supply Voltage Range (VDC) (P1)
Input Current Range [mA]
Nominal Input Impedance [Ohms]
PLV Range [VDC][P4]
Nominal Input Impedance [ohms][P4]
Output Status Functions
Initial Logic Supply On
Load Voltage Missing / Load Open (W/ PLV = 0V)
Load Voltage Missing / Load Open (W/ PLV > 0V)
General Specifications
Dielectric Strength, Input/Output/Base (50/60Hz)
Minimum Insulation Resistance (@ 500 V DC)
DC Control
8-28
20-30
30K
0-10
20K
LED
Flash Once
Flash Once Intermittenly
Flash Twice Intermittently
Parameters
4000 Vrms
10
9
Ohm
VAV-PRC012-EN
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DDC Controls
General Specifications
Maximum Capacitance, Input/Output
Ambient Operating Temperature Range
Ambient Storage Temperature Range
Encapsulation
Input connector
Output Terminals
Output Max Wire Size
Output Screws Maximum Torque
Assembly Specifications
Weight (typical)
Heat Transfer Material Used
Material
Finish
Torque Applied
Pneumatic Controls
3011 Pneumatic Volume Regulator
Parameters
10 pF
-20 to 80°C
-40 to 125 °C
Thermally conductive Epoxy
Header Connector 3.5mm
Screws and Saddle Clamps Furnished, Installed
Output:2 x AWG 8 (3.8mm)
20 in lbs (2.2 Nm)
1.38 Lb (0.628 Kg.)
Thermal Pad
Steel
Nickel Plate
20 in/lbs ± 10%.
The pneumatic volume regulator (PVR) is a controller that provides a consistent airflow to the space, regardless of varying inlet duct pressure conditions, in response to a pneumatic thermostat signal. The controller maintains minimum and maximum airflow setpoints.The 3011 PVR can be set to control either normally open or normally-closed air valve actuators and can be calibrated to accept either direct-acting or reverse-acting thermostat signals. Fixed reset control of maximum and minimum airflow setpoints is provided.
Specifications
Differential Pressure Range
0-1 in. wg (0–249 Pa)
Minimum Setpoint Range
0-1 in. wg (0–249 Pa)
Maximum Setpoint Range
0.05 in. wg (12.5 Pa) above minimum to 1 in. wg (249 Pa) above minimum
Operating Static Pressure Range
0.25 in. wg—6.0 in. wg (62.3–1494 Pa)
Reset Pressure Span
Factory-set at 5 psig (34.5 kPa)
Field-adjustable from 0 to 10 psig
(0 to 68.9 kPa)
188 VAV-PRC012-EN
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Reset Start Point
Field-adjustable from 0 to 10 psig
(0 to 68.9 kPa)
Main Air Pressure
15 to 30 psig (103 to 207 kPa)
Air Consumption
28.8 scim (0.472 L/m) at 20 psig (138 kPa) main air pressure
Operating Environment
40 to 120ºF (4 to 49°C)
Storage Environment
-40 to 140ºF (-40 to 60°C)
Output Sensitivity
5 psig/0.02 in. wg (34.5 kPa/5.0 Pa)
Physical Dimensions
Width: 4.5" (114.3 mm)
Length: 2.3" (58.4 mm)
Height: 3.87" (98.3 mm)
Weight: 11 oz (312 g)
3501 Pneumatic Volume Regulator
Tubing Connections:
1/4" O.D. tubing connections
The 3501 PVR can be set to control either normally open or normally-closed air valve actuators and can be calibrated to accept either direct-acting or reverse-acting thermostat signals. Fixed reset control of maximum and minimum airflow setpoints is provided. The controller is used primarily in dual-duct constant-volume applications because of its linear output response characteristics. The controller resets the primary air velocity linearly with a change in thermostat pressure.
This is in contrast to the 3011 PVR, which resets velocity pressure with a change in thermostat pressure. This allows the 3501 PVR to have improved stability at low flows.
Specifications
Differential Pressure Range
0–1.0 in. wg (0–249 Pa)
Minimum Setpoint Range
0–1.0 in. wg (0–249 Pa)
Maximum Setpoint Range
Minimum to 1.0 in. wg (249 Pa)
Operating Static Pressure Range
0.25–6.0 in. wg (62.3–1494 Pa)
VAV-PRC012-EN 189
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Reset Pressure Span
Factory-set at 5 psig (34.5 kPa)
Field-adjustable from 0 to 7 psig
(0 to 48.3 kPa)
Reset Start Point
Factory-set at 8 psig (55.2 kPa)
Field-adjustable from 0 to 10 psig
(0 to 68.9 kPa)
Main Air Pressure
15–30 psig (103 to 207 kPa)
Air Consumption
43.2 scim (0.708 L/m) at 20 psig (138 kPa) main air pressure
Operating Environment
40 to 120ºF (4 to 49°C)
Storage Environment
-40 to 140ºF (-40 to 60°C)
Output Sensitivity
5 psig/ 0.02 in. wg (34.5 kPa/ 5.0 Pa)
Physical Dimensions
Width: 4.5" (114.3 mm)
Length: 3.87" (98.3 mm)
Height: 4.1" (104.1 mm)
Weight: 12 oz (340 g)
Pneumatic Damper Actuator
The pneumatic actuator is designed for use on VAV terminal units in HVAC systems.The damper actuator mounts to a standard ½" diameter shaft by a pin and cross hold arrangement, retaining clip, and non-rotation bracket.
Two model actuators are offered with spring ranges of 3–8 psi or 8–13 psi.
Specifications
Effective Area
8 sq inches (51.6 sq cm)
Normal Rotation
100 degrees
Spring Ranges
Model 3631–5000: 8-13 psi (55.2–89.6 kPa)
Model 3631–8000: 3-8 psi (20.7–55.2 kPa)
190 VAV-PRC012-EN
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Reversing Relay
Supply Connection
3/16" (4.8 mm) nipple for ¼" (6.4 mm) O.D. tubing
Weight
1.5 lbs (680 g)
Ambient Limits:
Operating:-20 to 120°F
(-28.889 to 48.889°C)
Shipping:-40 to 140°F (-40 to 60°C)
Tubing Connections:
1/4" O.D. tubing connections
The pneumatic reversing relay is a proportional device that reverses the action of the input signal. It is used to change a direct-acting signal into a reverse-acting signal or to change a reverse-acting signal into a direct-acting signal.This relay is used to match the operating pressure range of controlled devices (valves, pressure switches, etc.) to the output pressure range of a controller (such as a thermostat).The output response will always remain in
1:1 proportion to the input signal, but the relay includes the capability to bias the output signal.
VAV-PRC012-EN
Specifications
Factory Setting
Contingent upon the selected control option
Generally set for 8 psig in. = 8 psig out or 9 psig in=9 psig out (55.2 kPa in. = 55.2 kPa out or 62.1
kPa in. = 62.1 kPa out)
Bias Adjustment
+/- 15 psig (103 kPa)
Main Air Pressure
15-30 psig (103–207 kPa)
Air Consumption
18 scim (0.295 L/m) at 20 psig (138 kPa) main air pressure
Operating Environment
40 to 120ºF (4°C to 49°C)
Storage Environment
-40 to 140ºF (-40 to 60°C)
Physical Dimensions
Width: 1.5" (38.1 mm)
Length: 1.5" (38.1 mm)
Height: 2.5" (63.5 mm)
191
DDC Controls
Signal Limiter
Tubing Connections:
3/16" (4.8 mm) nipples for 1/4" (6.4 mm) polyethylene tubing
The pneumatic signal limiter is a pressure limiting type device.The output pressure from the signal limiter is not allowed to rise above the signal limiter’s setting. Adjustments to the output pressure setting are made via a screw on the back side of the valve.
Specifications
Factory Setting
Maximum output = 8 psig (55.2 kPa) Adjustable from 2–12 psig (13.8–82.7 kPa)
Main Air Pressure
Nominal 20 psig (138 kPa) 22 psig
(152 kPa) maximum acceptable pressure
Air Consumption
10 scim (0.164 L/m) at 20 psig (138 kPa) main air pressure
Operating Environment
50 to 120ºF (10 to 48.89°C)
Physical Dimensions
Width:. 1.1" (27.94 mm)|
Length: 0.9" (22.86 mm)
Height: 0.9" (22.86 mm)
Tubing Connections
9/100" (2.3 mm) nipples
192 VAV-PRC012-EN
DDC Controls
PN00 – VPCF, LPCF Parallel Fan-Powered Without Reheat
(Normal Operation: Cooling Only)
Normally-Open Damper and Actuator (Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increase primary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs until the damper is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan is energized.
S
15
(103
.4)
20
(137
.9)
Actuator
Tee
Two Pipe
Remote Mounted
T-Stat
(Reverse-Acting)
100
T-Stat Pressure (kPa)
Fan On
Fan
P.E.
Switch
(N.O.)
9 PSI
(62.06 kPa)
100
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse-Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
Air
Va lve
Customer Notes:
1.
Factory installed.
Optional or installed by others.
3
8 9
T-Stat Pressure (PSI)
PN00 – VPEF, LPEF Parallel Fan-Powered with Electric Heat
(Normal Operation: Cooling Only)
Normally-Open Damper and Actuator (Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increase primary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs until the damper is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan is energized. If zone temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
9 PSI
(62.06 kPa)
S
Electric Heater
Terminal Box
Tee
Fan P.E.
Switch
(N.O.)
15
(103
.4)
20
(137.
9)
Actuator
Two Pipe
Remote Mounted
T-Stat
(Reverse-Acting)
Tee
100
T-Stat Pressure (kPa)
Fan On
Ai r V alv e
1st
2nd
3rd
3
8 9 10 12
T-Stat Pressure (PSI)
14
100
Stages of Heat
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse-Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
Customer Notes:
1.
Factory installed.
Optional or installed by others.
VAV-PRC012-EN 193
DDC Controls
194 VAV-PRC012-EN
PN00-VSCF, LSCF series fan-powered without reheat
DDC Controls
VAV-PRC012-EN 195
DDC Controls
PN00-VSEF, LSEF series fan-powered with electric heat
196 VAV-PRC012-EN
PN00-VSWF, LSWF series fan-powered with water coils
DDC Controls
VAV-PRC012-EN 197
DDC Controls
198 VAV-PRC012-EN
DDC Controls
PN05 – VPWF, LPWF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Hot Water Reheat)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator
(Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator, which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. If the zone temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
S
3-8 PSI
(20.69 - 55.16 kPa)
T
20
(137.9)
Water
Valve
(N.O.)
(10
S
20
(13
7.9)
M
Volume
Regulator
B
M
Reversing
Relay
S
9 PSI In
(62.06 kPa)
9 PSI Out
(62.06 kPa)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Tee
Tee
S
20
(137.9)
T-Stat Branch Pressure (kPa)
100
Fan On
100
Fan
P.E.
Switch
(N.O.)
9 PSI
(62.06 kPa)
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
MAX
CFM
Air
Valv e
MAX
LPS
S
20
(137.9)
Restricted Leg
MIN
CFM
Wa te r
Valv e
MIN
LPS
One Pipe Inset
Customer Notes:
3 8 9 10 13
T-Stat Branch Pressure (PSI)
15
1.
Factory installed.
Optional or installed by others.
PN05 – VPEF, LPEF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Electric Reheat)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator
(Reverse-Acting Thermostat)
With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator, which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. If the zone temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
9 PSI
(62.06 kPa)
T
Electric Heater
Terminal Box
Fan P.E.
Switch
S
15
(103.
4)
20
(137.
9)
M
Volume
Regulator
Tee
(N.O.)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
S
20
(137.9)
T-Stat Branch Pressure (kPa)
Tee
100
MAX
CFM
Air
Valv e
Fan On
2nd
3rd
100
MAX
LPS
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
MIN
CFM
MIN
LPS
1st
3 8 9 10 12 14
T-Stat Branch Pressure (PSI)
Stages of Heat
Customer Notes:
1.
Factory installed.
Optional or installed by others.
VAV-PRC012-EN 199
DDC Controls
200
PN51 – VSCF, LSCF - Fan-Powered Terminal Units
(Normal Operation: Cooling Only - Duct Pressure Switch)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat)
This unit is energized by sensing inlet static pressure by the duct pressure switch. The unit fan runs continually during occupied operation.
With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator.
S
15
20
(103.4) (137.9)
T
M Volume
Regulator
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
S
20
(137.9)
T-Stat Branch Pressure (kPa)
100
MAX
CFM
Occupied
Fan On
Air
Valve
100
MAX
LPS
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
MIN
CFM
MIN
LPS
3 8 9
T-Stat Branch Pressure (PSI)
Customer Notes:
1.
Factory installed.
Optional or installed by others.
PN51 – VSEF, LSEF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Electric Reheat - Duct Pressure Main)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat)
This unit is energized by sensing inlet static pressure by the duct pressure switch. The unit fan runs continually during occupied operation.
With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. If the zone temperature continures to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
M
Volume
Regulator
T
Electric Heater
Terminal Box
S
15
20
(103.4) (137.9)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Tee
S
20
(137.9)
T-Stat Branch Pressure (kPa)
100
MAX
CFM
MIN
CFM
Occupied
Fan On
Air
Valve
1st
2nd
3rd
3 8 9
10 12 14
T-Stat Branch Pressure (PSI)
100
MAX
LPS
MIN
LPS
Stages of Heat
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
Customer Notes:
1.
Factory installed.
Optional or installed by others.
VAV-PRC012-EN
DDC Controls
PN51 – VSWF, LSWF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Hot Water Reheat - Duct Pressure Switch)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator
(Reverse-Acting Thermostat)
This unit is energized by sensing inlet static pressure by the duct pressure switch. The unit fan runs continually during occupied operation. With an increase in room temperature the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator. If the zone temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
Water
Valve
(N.O.)
3-8 PSI
(20.69 - 55.16 kPa)
M
Volume
Regulator
T
B
M
Reversing
Relay
S
9 PSI In
(62.06 kPa)
9 PSI Out
(62.06 kPa)
S
15
20
(103.4) (137.9)
S
20
(137.9)
S
15 20
(103.4) (137.9)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
T-Stat Branch Pressure (kPa)
Tee
100
MAX
CFM
MIN
CFM
Occupied
Fan On
Air
Valve
Water
Valve
100
MAX
LPS
MIN
LPS
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
3 8 9 10 13
T-Stat Branch Pressure (PSI)
15
Customer Notes:
1.
Factory installed.
Optional or installed by others.
PN52 – VSEF, LSEF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Electric Reheat - Duct Pressure Switch)
Normally-Open Damper, Actuator, and 3011 Pneumatic Regulator
(Reverse-Acting Thermostat)
The unit is energized into occupied status by a setting of main system air pressure to 15 psi (103 kpa). At unoccupied, the main system air is set to 20 psi (138 kpa). The unit fan cycles on as 1st stage heat when called for by the unit t-stat. Dual setpoint pneumatic thermostat is suggested for this option. With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator, which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. If the zone temperature continues to decrease after the fan has been energized, heating stages are energized at the appropriate pressure settings.
9 PSI
(62.06 kPa)
T
Electric Heater
Terminal Box
Tee
Fan P.E.
Switch-1
(N.O.)
S
15
20
(103.4)
(137.9)
M
Volume
Regulator
S
15
20
(103.4) (137.9)
T-Stat Branch Pressure (kPa)
Occupied
Fan On
100
MAX
CFM
MIN
CFM
Air
Valve
1st
2nd
3 8 9 10
12 14
T-Stat Branch Pressure (PSI)
3rd
Unoccupied
Fan On
100
MAX
LPS
MIN
LPS
Tee
Stages of Heat
S
15
(103.4)
20
(137.9)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Fan P.E.
Swtich-2
(N.C.)
18 PSI
(124.11 kPa)
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
Customer Notes:
1.
Factory installed.
Optional or installed by others.
VAV-PRC012-EN 201
DDC Controls
202
PN52 – VSCF, LSCF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Electric Reheat - Dual Pressure Main)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator
(Reverse-Acting Thermostat)
The unit is energized into occupied status by a setting of main system air pressure to 15 psi (103 kpa). At unoccupied, the main system air is set to 20 psi (138 kpa). The unit fan cycles on as 1st stage heat when called for by the unit's thermostat. Dual setpoint pneumatic thermostat is suggested for this option. With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. Minimum and maximum primary airflow settings are maintained by the volume regulator.
S
15
20
(103.4)
(137.9)
M
Volume
Regulator
T
Tee
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
S
15
20
(103.4)
(137.9)
Fan
P.E.
Switch-1
(N.O.)
9 PSI
(62.06 kPa)
Fan P.E.
Swtich-2
(N.C.)
18 PSI
(124.11 kPa)
100
MAX
CFM
T-Stat Branch Pressure (kPa)
Occupied
Fan On
Air
Valve
100
MAX
LPS
S
15
20
(103.4) (137.9)
Unoccupied
Fan On
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
137.9
(20)
One Pipe Inset
MIN
CFM
MIN
LPS
3
8 9
T-Stat Branch Pressure (PSI)
Customer Notes:
1.
Factory installed.
Optional or installed by others.
PN52 – VSWF, LSWF - Fan-Powered Terminal Units
(Normal Operation: Cooling with Electric Reheat - Dual Pressure Main)
Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator
(Reverse-Acting Thermostat)
The unit is energized into occupied status by a setting of main system air pressure to 15 psi (103 kpa). At unoccupied, the main system air is set to 20 psi (138 kpa). The unit fan cycles on as 1st stage heat when called for by the unit's thermostat. Dual setpoint pneumatic thermostat is suggested for this option. With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring. The volume regulator outputs a signal compensated for changing duct pressures to the valve actuator which opens the damper and increases primary cooling flow to the space. With a decrease in room temperature, the opposite action occurs. If the zone temperature continues to decrease after the fan has energized, heating stages are energized at the appropriate pressure settings.
Water
Valve
(N.O.)
3-8 PSI
(20.69 - 55.16 kPa)
S
15
(103.4)
20
(137.9)
M
Volume
Regulator
T
S
15
(103.4)
20
(137.9)
B
M
Reversing
Relay
S
9 PSI In
(62.06 kPa)
9 PSI Out
(62.06 kPa)
Two Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Tee
Fan P.E.
Swtich-2
(N.C.)
18 PSI
(124.11 kPa)
S
15
20
(103.4) (137.9)
T-Stat Branch Pressure (kPa)
Tee
100
MAX
CFM
Occupied
Fan On
Air
Valve
Water
Valve
Unoccupied
Fan On
Fan
P.E.
Switch-1
(N.O.)
9 PSI
(62.06 kPa)
MAX
LPS
S
15
20
(103.4) (137.9)
Restrictor
Tee
One Pipe
Remote Mounted
T-Stat
(Reverse Acting)
Restricted Leg
S
20
(137.9)
One Pipe Inset
MIN
CFM
MIN
LPS
3 8 9 10 13
T-Stat Branch Pressure (PSI)
15
Customer Notes:
1.
Factory installed.
Optional or installed by others.
VAV-PRC012-EN
DDC Controls
Controls Specifications
For all VariTrane units, the unit controller continuously monitors the zone temperature and varies the primary airflow as required to meet zone setpoints. Airflow is limited by adjustable minimum and maximum setpoints.
Additionally, for series fan-powered units, the controller will start and run the fan continuously during the occupied mode and intermittently during the unoccupied mode. Upon a further call for heat, any hot water or electric heat associated with the unit is enabled.
For parallel fan-powered units, the controller energizes the fan upon a call for heat. Upon a further call for heat, reheat is enabled.
Fan Speed Control
Variable Speed Control Switch (SCR)
The SCR speed control device is standard on all fan-powered units.The SCR adjusts the fanspeed and provides simplified system balancing.
Direct Digital Controls (DDC)
LonMark Direct Digital Controller
Trane-designed LonMark certified controller uses the space comfort control (SCC) profile to exchange information over a LonTalk Network. LonMark networks provide the latest open protocol technology.
Direct Digital Controller
The microprocessor-based terminal unit controller provides accurate, pressure-independent control through the use of a proportional integral control algorithm and direct digital control technology. The UCM, monitors zone temperature setpoints, zone temperature, the rate of temperature change, and valve airflow. With the addition of optional sensors, room occupancy or supply duct air temperature can be monitored. The controller is provided in an enclosure with 7/
8" (22 mm) knockouts for remote control wiring. A Trane DDC zone sensor is required.
DDC Actuator
Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkage release button.
Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb, a 90-second drive time, and is non-spring return. Travel is terminated by end stops at fully opened and closed positions. An integral magnetic clutch eliminates motor stall.
DDC Actuator - Belimo
LMB24-3-TTN 3-wire, 24 VAC/DC, floating-point, quarter turn actuator with linkage release button.
Actuator has a constant drive rate independent of load, a rated torque of 45 in-lb, a 95 second drive time, and is non-spring return. Travel is terminated by end stops at fully-opened and -closed positions. Internal electronic control prevents motor stall when motor reaches end stops.
DDC Zone Sensor
The UCM controller measures zone temperature through a sensing element located in the zone sensor. Other zone sensor options may include an externally-adjustable setpoint, communications jack for use with a portable service tool, and an override button to change the individual controller from unoccupied to occupied mode. The override button has a cancel feature that will return the system to unoccupied. Wired zone sensors utilize a thermistor to vary the voltage output in response to changes in the zone temperature. Wiring to the UCM controller must be 18 to 22 awg.
twisted pair wiring. The setpoint adjustment range is 50–88ºF (10–31°C) Depending upon the features available in the model of sensor selected, the zone sensor may require from a 2-wire to a 7-wire connection. Wireless zone sensors report the same zone information as wired zone
VAV-PRC012-EN 203
DDC Controls
204 sensors, but do so using radio transmitter technology. No wiring from the zone sensor to the UCM controller is necessary.
Digital Display Zone Sensor with Liquid Crystal Display (LCD)
The direct digital zone sensor contains a sensing element which sends a signal to the UCM. A Liquid
Crystal Display (LCD) indicates setpoint, or space temperature. Sensor buttons allow setpoint adjust, and allow space temperature readings to be turned on or off.The digital display zone sensor also includes a communication jack, for use with a portable edit device, and an override button to change the UCM from unoccupied to occupied. The override button has a cancel feature, which returns the system to unoccupied mode.The digital display zone sensor requires seven wires, one for 24-VAC power.
System Communications
The Controller UCM sends and receives data from a Tracer SC or other Trane Controller. Current unit status and setpoints may be monitored and/or edited via this data communication feature.The
network type is a twisted wire pair shielded serial communication.
The following direct digital control features are available with VariTrane terminal units:
• Controls Option – DD00: Trane actuator for field-installed DDC controllers
• Controls Option – DD01: Cooling Only (DDC/UCM)
• Controls Option – DD02: Cooling with Normally-Closed On/Off hot water valve (Normally-Open outputs) (DDC/UCM)
• Controls Option – DD03: Cooling with proportional hot water valve with optional spare On/Off
Output) (DDC/UCM)
• Controls Option – DD04: Cooling with staged On/Off electric heat (DDC/UCM)
• Controls Option – DD05: Cooling with pulse-width modulation electric heat (DDC/UCM)
• Controls Option – DD07: Cooling with Normally-Open On/Off hot water valve (Normally-Closed outputs) (DDC/UCM)
• Controls Option – DD08: Cooling and Heating - Dual-Duct Constant Volume (DDC/UCM)
• Controls Option – FM00: Factory installation of customer supplied actuator and DDC controls.
Controls supplier is responsible for providing factory-installation and wiring instructions.
• Controls Option – FM01: Trane actuator with factory installation of customer supplied DDC controls. Controls supplier is responsible for installing and wiring instructions.
• Controls Option – ENON: Shaft only for field-installation of customer-supplied actuator and controls.The following override commands may be received by the Unit Control Module (UCM) from a Tracer SC or other Trane controllers.
• Control Mode – The UCM Control Mode may be edited from occupied to unoccupied to accommodate night setback/setup.
• Control Action –The Control Action may be edited from cooling to heating, changing the primary air damper to a heating source.This will accommodate a cooling/heating changeover system.
• Control Offset – Enabling Control Offset will increase the cooling temperature setpoint and decrease the heating temperature setpoint by a control-offset value (Stored at limiting in the occupied mode).
• Drive damper fully open
• Drive damper fully closed
• Drive damper to maximum airflow setpoint
• Drive damper to minimum airflow setpoint
• Disable unit heat
VAV-PRC012-EN
VAV-PRC012-EN
DDC Controls
• Reset-Enabling the reset function forces the controller and the flow sensor to recalibrate
• Programmable hot water valve drive time
• Programmable air damper drive time
The following unit setpoints reside in the UCM in nonvolatile memory.These setpoints are editable from the Tracer via the communications link.
• Occupied cooling temperature setpoint (60–80ºF (15–26°C))
• Occupied heating temperature setpoint (60–80ºF (15–26°C))
• Unoccupied cooling temperature setpoint (60–100ºF (15–37°C))
• Unoccupied heating temperature setpoint (30–100ºF (15–37°C))
• Minimum cooling flow setpoint (0, 10–110% of unit equivalent nominal airflow)
• Minimum heating flow setpoint (0, 10–110% of unit equivalent nominal airflow)
• Maximum flow setpoint (0, 50–100% of unit equivalent nominal airflow)
• Fan Control Offset –This determines at what operating point the fan in a parallel fan-powered unit is energized. This can be specified as a function of temperature, degrees above heating setpoint, or primary airflow (0–10°F (-17–12°C) or 0,10–100% of unit equivalent nominal airflow).
• Heating Setpoint Offset – This determines at what point the first stage of reheat turns on.
Expressed in degrees below cooling setpoint. (Only applicable when local thumbwheel is enabled.)
• Zone temperature, auxiliary temperature, and zone setpoint calibration corrections (adjustable from +/-10.0ºF (+/- -12°C)).
• Flow measurement calibration correction (50–150%)
• Cooling Setpoint Low Limit – Applies low limit to programmed occupied cooling setpoint or zone sensor cooling setpoint (30–100°F (-1–37°C)).
• Heating Setpoint High Limit – Applies high limit to programmed occupied heating setpoint or zone sensor heating setpoint (30–100ºF (-1–37°C)).
• RTD / Thermistor – Determines what type of zone temperature sensor will be used.
• Occupied and Unoccupied Outside Air Requirements – Determines the percent of outdoor air required in the zone for air quality requirements.
• Series Fan Configuration – allows option of series fan-powered box to shut off fan and close air valve when unit is unoccupied. Fan will operate in unoccupied mode if reheat is active.
• Heating setpoint low limit.
• Cooling setpoint high limit.
• Local heating flow setpoint enable/disable and setpoint.
• Auxiliary analog input mode select for either auxiliary temperature sensor or CO
2 detector.
• Binary input mode select for either generic or occupancy detector. In addition to the above setpoints, the following status information can be transmitted to a Tracer SC or other Trane controllers.
• Active cooling temperature setpoint
• Active heating temperature setpoint
• Current unit primary airflow
• Current zone temperature
• Re-heat status (On/Off)
• Auxiliary Air Temperature – Available only if the unit has an auxiliary temperature sensor.
205
DDC Controls
• Failure Indicators –The UCM will indicate the following: 1)Temperature Sensor Failure; 2) Flow
Sensor Failure; and 3) Local Zone Sensor Setpoint Failure.
• Ventilation Ratio
• Fan Status (on/off)
• Calibration Status (calibration/not-calibrating)
• BIP state
• CO
2
Concentration—Available only if the unit has an auxiliary CO auxiliary air temperature are mutually exclusive.
2 sensor. This mode and
Pneumatic Controls
Normally-Open Actuator
Pneumatic 3 to 8 psig (20 to 55 kPa) spring-range pneumatic actuator.
Normally-Closed Actuator
Pneumatic 8 to 13 psig (55 to 90 kPa) spring-range pneumatic actuator.
3011 Pneumatic Volume Regulator (PVR)
The regulator is a thermostat reset velocity controller, which provides consistent air delivery within
5% of cataloged flow down to 15% of unit cataloged cfm, independent of changes in system static pressure. Factory-calibrated, field-adjustable setpoints for minimum and maximum flows.
Average total unit bleed rate, excluding thermostat, is 28.8 scim at 20 psig (7.87 mL/min at 138 kPa) supply.
3501 Pneumatic Volume Regulator (PVR)
The 3501 regulator is a linear-reset volume controller. This PVR is used to maintain a constant volume of airflow from the dual-duct unit when constant volume control is used. Average total unit bleed rate, excluding thermostat, is 43.2 scim at 20 psig (11.8 mL/min at 138 kPa) supply.
Considerations for Pneumatic Thermostat
Field-supplied and -installed based on chosen control options, a direct-acting or a reverse- acting, one-pipe or two-pipe pneumatic room thermostat will control the available air valve, reheat and fan switch to maintain room temperature setpoint.
The following pneumatic control options features are available with VariTrane terminal units:
• PN00: Cooling with Normally-Open damper and actuator only (Reverse-Acting Thermostat)
• PN04: Cooling with hot water reheat, Normally-Open damper, 3011 PVR (Direct-Acting
Thermostat)
• PN05: Cooling with electric reheat, Normally-Open damper, 3011 PVR (Reverse-Acting
Thermostat)
• PN08: Cooling and Heating, Normally-Open dampers, actuators only (Reverse-Acting
Thermostat)
• PN09: Cooling and Heating, Normally-Open dampers, 3011 PVR’s (Direct-Acting Thermostat)
• PN10: Cooling and Heating, Normally-Open dampers, 3501 PVR’s, Dual-Duct Constant Volume
(Direct-Acting Thermostat)
• PN11: Cooling with hot water reheat, Normally-Open damper, 3011 PVR - Auto Dual Minimum
(Direct-Acting Thermostat) (N.O. Water Valve)
• PN32: Cooling with hot water reheat, Normally-Open damper, 3011 PVR - Constant Volume
(Direct-Acting Thermostat)
• PN34: Cooling with electric reheat, Normally-Open damper, 3011 PVR - Constant Volume
(Reverse-Acting Thermostat)
• PN51: Cooling with reheat, Normally-Open damper, 3011 PVR Duct Pressure Switch (Reverse-
Acting Thermostat)
• PN52: Cooling with reheat, Normally-Open damper, 3011 PVR - Dual Pressure Minimum
(Reverse-Acting Thermostat)
206 VAV-PRC012-EN
DDC Controls
• PC00: Cooling Only with Normally-Closed damper - Direct-Acting Thermostat
• PC03: Cooling and Heating, Normally-Closed heating damper, Normally-Open cooling damper, actuators only - Direct-Acting Thermostat
• PC04: Cooling with hot water reheat, Normally-Closed damper, 3011 PVR - Direct-Acting
Thermostat
• PC05: Cooling with electric reheat, Normally-Closed damper, 3011 PVR - Reverse-Acting
Thermostat
Options
Power Fuse (cooling only and hot water units, and VDDF)
An optional fuse is factory-installed in the primary voltage hot leg.
Transformer (Standard on fan-powered, optional on VCCF, VCWF, VDDF)
The 50-VA transformer is factory-wired and installed in an enclosure with 7/8" (22 mm) knockouts to provide 24 VAC for controls.
Wireless Zone Sensor/Receiver
Factory mounted Receiver with field mounted Sensor accessory eliminates the need for the wiring between the zone sensor and unit level controller. See specifications on Page C67XXX.
Disconnect Switch (Optional on VCCF, VCWF, VDDF)
Disengages power.
DDC Retrofit Kit (VRTO)
The kit consists of a Trane DDC Unit Control Module (UCM) VAV terminal unit controller and a pressure transducer installed in a metal enclosure. The mechanical specifications of accessories such as DDC zone sensors, hot water valves, and transformers are found elsewhere in this section.
Retrofit Kit Options
Flow Bar Sensor
The flow bar sensor is a multiple-point, averaging, pitot tube type flow sensor. It is intended for field installation on terminal units that have no flow measurement device.The total and static pressure outputs of the sensor are field-piped to the high and low inputs of the pressure transducer in the retrofit kit.
Retrofit Kit Actuator
The electric actuator is a direct-coupled type actuator that utilizes three-wire, floating-point control.
The actuator is field-installed to the damper shaft and field-wired to the controller.
Trane Actuator – Actuator is rated at 4 VA at 24 VAC. Drive time is 90 seconds with 35 in.-lb (4 N-m).
Retrofit Actuator – Actuator is rated at 3 VA at 24 VAC. Drive time is 80 to 110 seconds for 0 to 35 in.-lb (0 to 4 N-m).
Other Options Available
• DDC Zone Sensors
• 2-Position & Modulating Water Valves
• Control Transformer (Ships loose with mounting plate for 4x4 junction box)
• Auxiliary Temperature Sensor
• Zone Occupancy Sensors
• Co
2
Sensors (Room- or duct-mounted)
VAV-PRC012-EN 207
Application Considerations
Variable-Air-Volume (VAV) System
EA
RA
OA supply fan
PA cooling coil variablespeed drive thermostat
VAV box
SA
VAV System
No Heat
Central Cooling Only—In some systems, the central air handler provides only cooling and ventilation during zone occupied periods.The supply air is maintained at a constant temperature and the supply airflow is modulated to match the VAV airflow rate with the zone cooling requirements.
Central Heat
Central Heat for Morning Warm-up—Many buildings cool down during the night. To be at a comfortable temperature in the morning when the building is again occupied, heat must be added to the spaces. Heat provided by the central air handler for morning warm-up is supplied at constant air volume to the zones, prior to the time of occupancy. During the morning warm-up period, the
VAV terminal units must open to allow heated air to flow into the zones. In most instances very little additional heat is needed once the building is occupied.
Central Occupied Heating-Changeover—Some buildings use the same air handler to provide both occupied cooling and occupied heating.This is commonly referred to as a changeover system.
The system changes between heating and cooling depending on the need of the zones on the system. In a changeover system, the operation of the VAV terminal units must also change over, opening to provide heat in the heating mode and opening to provide cooling in the cooling mode.
Trane's main product in this type of application is called VariTrac™. VariTrane products can also be used in these systems. (These types of systems are beyond the scope of this manual and are discussed in detail in the VariTrac II Manual.
208 VAV-PRC012-EN
Application Considerations
Terminal Heat
Remote Heat—In some zones of a single-duct VAV system, perimeter heating equipment, remote from the terminal unit, is used to add heat to the zone when the cooling load is lower than the minimum cooling capacity of the VAV terminal unit. Heat is added directly to the zone while cool supply air continues to enter the zone at a minimum rate for zone ventilation.
Terminal Reheat—In some zones of a single-duct VAV system, a minimum flow of cool supply air is reheated at the terminal unit before entering the zone. Terminal reheat can be provided by electrical resistance heaters or by hot water coils.
Parallel Fan-Powered Heat—In some zones of a single-duct VAV system, cool supply air at minimum flow is mixed with warm plenum air before entering the zone at a constant flow rate. A fan in the terminal unit, in parallel with the central fan, draws air from the plenum whenever the zone requires heat.
Series Fan-Powered Heat—In some zones of a single-duct VAV system, the airflow to the zone is held constant, during both heating and cooling, by a terminal unit fan that is in series with the central fan.The terminal unit fan runs continuously. When the zone requires heat, cool supply air at minimum flow is mixed with warm, return plenum air before entering the zone.
VariTrane VAV Terminal Units
The function of the VariTrane terminal unit in a VAV control zone is to vary the volumetric airflow rate to the zone. VariTrane units are available with either microprocessor-based DDC controls or pneumatic or analog electronic controls. Factory-installed controls are available with all types of terminal units.
Figure 12. Parallel fan-powered unit cooling only
Figure 13. Parallel fan-powered unit with hot water coil (L) and parallel fan-powered unit with electric coil (R)
VAV-PRC012-EN 209
Application Considerations
Figure 14. Series fan-powered unit cooling only (L) and series fan-powered unit with hot water coil (R)
VAV Terminal Unit Types
Parallel Fan-Powered
Parallel fan-powered units are commonly used in VAV zones which require some degree of heat during occupied hours—when the primary supply air is cool.The terminal unit fan is in parallel with the central unit fan; no primary air from the central fan passes through the terminal unit fan.The
terminal unit fan draws air from the space return plenum.
When no heat is needed, the local parallel fan is off and a backdraft damper on the fan’s discharge is closed to prevent cool air entry into the return plenum. When cool airflow to the VAV zone is at a minimum and the zone temperature drops below setpoint, the local parallel fan is turned on and the backdraft damper opens. A constant volume of air is delivered to the zone because the fan delivers a constant volume of warm plenum air which is mixed with cool primary air at a minimum flow. Remote heat or terminal reheat can provide additional local heating.
Series Fan-Powered
Series fan-powered terminal units are used commonly in VAV zones that require heat during occupied hours, desire constant air volume delivery, and are willing to pay for the additional energy consumption required.The terminal unit fan is in series with the central fan. Primary air from the central fan always passes through the terminal unit fan.
The local series fan within the terminal unit operates whenever the unit is in the occupied mode.
The volume of air delivered to the VAV zone is constant, but the temperature of the delivered air varies. As the zone requires less cooling, the primary air damper closes. As the primary air damper closes, the air mixture supplied to the zone contains less cool air and more warm plenum air.
Remote heat or terminal reheat can provide additional local heating.
Series fan-powered terminal units are also useful in low supply air temperature systems, since the terminal unit fan can be sized so that warm plenum air is always mixed with low temperature supply air. This raises the supply air temperature to an acceptable distribution level and reduces condensation potential.
Low-Height Fan-Powered
Low-height fan-powered terminal units are a slightly modified version of a fan-powered terminal unit. As its name suggests, the low-height fan-powered unit has a shorter height dimension to accommodate applications where ceiling space is limited. To reduce the height, shorter terminal unit fans are integrated into the standard height series or parallel terminal unit.The result is a unit with a maximum height of 11.0" to 11.5".
For low-height units with the smaller fan sizes (sizes 08SQ and 09SQ), a single low-profile fan is used. Low-height units with the largest fan size (size 10SQ) use two low-profile fans. Each fan
210 VAV-PRC012-EN
Application Considerations
operates off a separate motor. The fans still remain in series or parallel with the primary system central fan. Low acoustic levels are much more challenging in these low ceiling space applications, due to the reduced radiated ceiling pleunum effect.
The operation of the low-height terminal unit is exactly the same as that of a series or parallel terminal unit, as are the options for high-efficiency ECMs, insulation options, etc. As with the other fan-powered terminal units, additional local heating can be provided by remote heat or terminal reheat.
Parallel vs. Series
In many climates, fan-powered systems are a lower operating cost alternative than single-duct systems. The energy inefficiencies inherent in reheating cold primary air can be eliminated with a key design characteristic of fan-powered terminal units, plenum air heating. Heating with warmer plenum air allows for recovery of heat from lighting and other heat sources in the building.
Comparison of Parallel and Series Models
Once it has been determined that a fan-powered system is to be specified, the designer must decide between parallel and series configurations. Each model carries its own characteristics of delivered airflow, energy consumption, and acoustics. For the end user, the designer might consider three goals: a comfortable and productive tenant environment, acceptable installed cost, and low operating costs.
Parallel and series fan-powered terminal units offer specific advantages for particular applications.
compares the key similarities and differences between the models that the designer should consider in performing an engineering analysis.
Typical Application of Parallel Units
Parallel intermittent fan-powered terminal units are very common in perimeter zones or buildings where loads vary during occupied hours. Core zones, which maintain a more constant cooling requirement, are better suited for variable airflow (single-duct) units.Typical jobs combine parallel fan-powered units (exterior) and single-duct units (interior) to provide an efficient system with lowest first cost. Although the overall NC of parallel systems is lower than an equivalent series system, the intermittent fan is sometimes noticed when energized.To minimize the impact of this
NC change, an ECM (Electrically Commutated Motor) can be used which has soft-start technology.
Typical Application of Series Units
Applications requiring constant air movement or blending utilize series constant fan-powered terminal units. Conference rooms, laboratories, and lobbies are common applications. Because the series fan also adds to the system external static pressure, office buildings take advantage of this design feature and down size main air handling equipment. Finally, series terminals are used in low-temperature air systems to temper cold primary air with warm plenum air and deliver it to the zone.
VAV-PRC012-EN 211
Application Considerations
Table 139. Parallel vs. series
Fan Operation
Operating Sequence
Fan Energization
Parallel Series
Intermittent operation during occupied and unoccupied modes.
Continuous operation during the occupied modes.
Intermittent operation during unoccupied mode.
Variable-volume, constant-temperature device during cooling. Constant-volume, variable-temperature during heating.
Constant-volume, variable-temperature device at all times. Delivers design airflow regardless of the load.
Based on zone temperature deviation from setpoint.
No interlock with central system fan required.
Interlocked with central system fan to deliver required air to the zone in both heating and cooling modes.
Terminal Fan Operating and
Size
Fan runs during heating load. Size for design heating load. Typically this is 40 to 60% of design primary cooling airflow.
Fan runs continually. Fan sizing should meet the greater of design cooling or heating airflow to the zone.
Air valve Sizing
Acoustics
Design cooling airflow.
Design cooling airflow.
Minimum Inlet Static Pressure
Required for Central Fan Sizing
Sufficient to overcome unit, heating coil, downstream duct and diffuser pressure losses.
Sufficient to overcome air valve pressure loss only.
When operating under cooling loads the terminal fan does not run, offering superior acoustic performance similar to single-duct VAV. Under heating loads, the fan operates intermittently. Acoustical impact can be minimized by use of a ECM.
Produces slightly higher background sound pressure levels in the occupied space. This sound level remains constant and is less noticeable than intermittent fan operation with PSC motors.
Figure 15. Parallel & series fan-powered terminal
212 VAV-PRC012-EN
Application Considerations
Low-Temperature Air
Figure 16. Low temperature air system layout
Variable
Volume
Exhaust
Fan
Heating Coil
Zone 1
Preheat
Coil
Variable Volume
Supply Fan
Series or Parallel
Fan-powered Unit
Cooling
Coil
48°
55°
Zone 2
Benefits of Low-Temperature Air
The benefits of low-temperature air systems include reduced first cost, reduced operating cost and increased revenue potential. Since low-temperature air transports more energy per cubic foot, smaller fans and ducts can be used. An EarthWise™ system takes that a step farther and includes optimizing the waterside of the HVAC system as well with low flow rates through the chilled water and condenser loops.
Since low-temperature water can transport more thermal energy per gallon, smaller pumps, pipes, and valves can be used. Smaller HVAC equipment consumes less energy so both electrical demand and consumption are lowered, reducing operating costs. The amount of revenue generated by a commercial building is related to the amount and quality of rental floor space.The amount of rental floor space is increased in a low-temperature air system, since air handlers, riser ducts, and equipment rooms are smaller. Since smaller ducts reduce the required ceiling plenum, additional floors may be included without increasing building height.
The concept of the EarthWise system is to deliver superior comfort and be less expensive to install and operate.The method to do this involves both waterside optimization and airside optimization.
The waterside is optimized using techniques of low water flow through the evaporator and condenser of the chiller as well as using chiller-tower optimization control strategies. For more information on the waterside of the EarthWise system, contact your localTrane representative or visit www.trane.com.
Airside savings are obtained using a combination of lower air temperature and intelligent control strategies.The ability of the VAV unit to communicate information is vital to system coordination.
System Operation
A low-temperature air system could be done with chilled water or direct expansion equipment. A chilled water system includes a chiller plant, VAV air handlers, and series or parallel fan-powered
VAV terminal units. The VAV air handlers use cold water, typically around 40°F (4.4°C), from the chiller plant, to cool the supply air to 45–50°F (7.2–10°C).The volume of supply air is determined by the airflow needs of the VAV terminal units. A direct-expansion system would include a VAV air
VAV-PRC012-EN 213
Application Considerations
handler or rooftop with series or parallel fan-powered VAV terminal units.The supply air would be cooled to 48–52°F (8.9–11.1°C).
The VAV terminal units include a parallel or series fan with the central air handler or rooftop fan.
The terminal unit fan operates continuously, mixing 45-50°F (7.2–10°C) supply air with warm plenum air, to provide 50–55°F (10–12.8°C) cooling air to the occupied space at design conditions.
As the cooling load in the space decreases, the VAV terminal air valve closes to reduce the flow of cold supply air and increase the flow of warm plenum air in the case of series terminal units.The
temperature of air supplied to the space rises, but the volume flow rate to the space is constant for the series unit.
Considerations for VAV products
To achieve the maximum benefit from the low-temperature air system, severalVAV considerations must be addressed.
Insulation
The units must be insulated to ensure that no condensation occurs on the units. How much insulation is needed? Trane has tested its insulation with the goal of developing a thermal resistance ratio for each type of insulation. The thermal resistance (TR) ratio can be used, along with the properties of the insulation and the system operating conditions to determine the necessary insulation thickness required.
In the low-temperature air system with fan-powered units, the ducts and diffusers downstream from the terminal unit handle air that is 55°F (12.8°C) or warmer. Therefore, condensation considerations are no different from conventional systems. Linear slot diffusers are recommended to take advantage of the Coanda effect described in the Diffusers section later in the catalog.
Terminal unit surfaces that are traditionally not insulated—electric and hot water reheat coils and the primary air inlet for example—should be thoroughly field-insulated.
Leakage
When the terminal unit fan is off, the air valve will close, and not leak. Ducts upstream of the terminal unit must also be thoroughly insulated and constructed for very low leakage.
Duct and terminal unit insulation can be internal or external. Keep in mind that internal insulation has hidden thermal leaks at joints and seams.These areas must be located and insulated externally to avoid condensation. External Insulation, on the other hand, allows a complete, uniform thermal seal.
Minimum settings and IAQ
Indoor air quality is usually best when a specific quantity of outside ventilation air reaches each building occupant. Maintaining a minimum ventilation rate is a challenge in any VAV system because the amount of supply air that reaches a particular space decreases as the cooling load decreases. To insure that a minimum amount of supply air reaches the space at all times, a minimum flow setting on the terminal unit is used. In low-temperature air systems, when the space needs heating, this minimum flow setting results in increased heating load. Therefore, it is important to include the additional load imposed by the cold supply air when calculating heating loads. Reheat may be required since the ventilation values are absolute requirements and not percentage of total airflow requirements.
EarthWise or Low-Temperature Air Distribution Design Considerations with
Parallel Fan-powered Terminal Units
The parallel fan-powered unit needs to be set up to run continuously rather than intermittently.
Since it is in parallel, the airflow required by the fan is less than a comparable series unit. This results in energy savings. Running the parallel fan continuously will take some minor control changes. It will, however, create a better acoustical installation.
214 VAV-PRC012-EN
Application Considerations
The parallel fan should be large enough to temper the design cooling airflow at 45–50°F to 50–55°F
(7.2–10°C to 10–12.8°C). For instance, if the design cooling airflow is 1000 cfm at 55°F (472 L/s at
12.8°C), you will need 781 cfm of 48°F (368 L/s of 8.9°C) supply air and 219 cfm of 80°F (103 L/s of
26.7°C) plenum air.The parallel fan can be sized for the 219 cfm (103 L/s) rather than the total room airflow.
The fan airflow plus the minimum primary airflow must be checked with the minimum airflow of the diffuse rs to insure that dumping doesn’t occur. If that is a concern, the minimum could be adjusted up or the fan airflow could be adjusted up.
As the valve closes, the downstream static pressure will decrease because the pressure is related to the airflow.The fan will supply more air at the valve minimum condition than at design due to the decreased static pressure.This should be a consideration when calculating how much airflow would occur at the minimum valve plus fan airflow condition.The new fan airflow would be found by looking at a fan curve at the new SP point. The new SP can be calculated:
X SP
1
=
SP
2
can be used to determine what percentage of the total airflow should come from the fan to temper the supply air, assuming 80°F (26.7°C) plenum air.
Table 140. Percentage of airflow from fan
Supply Air Temp.
(deg. F (C)
50 (0)
51 (10.6)
52 (11.1)
53 (11.7)
54 (12.2)
55 (12.8)
Primary Air Temperature (deg. F (C))
45 (7.2)
14%
17%
20%
23%
26%
29%
46 (7.8)
12%
15%
18%
21%
24%
26%
47 (8.3)
9%
12%
15%
18%
21%
24%
48 (8.8)
6%
9%
13%
16%
19%
22%
49 (9.4)
3%
6%
10%
13%
16%
19%
50 (10)
0%
3%
7%
10%
13%
17%
If anything other than 80°F (26.7°C), the following equation can be used to calculate the percentage:
Supply Temperature =(%*primarytemperature)+(1-%)*plenum temperature
Low-Temperature Air Distribution Design Considerations with Series Fanpowered Terminal Units
The VAV terminal unit includes a fan that operates continuously. The series fan should be large enough to insure that the mixture of cold supply air and warm plenum air is 50–55°F (10–12.8°C) at design cooling flow conditions. In these types of systems, it is a good design practice to develop the system based upon 55°F (12.8°C) air being provided to the space from the fan-powered terminal unit. If a lower temperature air is used downstream of the VAV terminal unit, the system designer will have some concerns related to condensation on diffusers and other low-pressure ductwork accessories. For instance, if the occupied space must receive 1000 cfm of 55°F (472 L/s at 12.8°C) air to satisfy to design cooling load, 715 cfm must be 45°F (337 L/s must be at 7.2°C) supply air and
285 cfm must be 80°F (135 L/s must be 26.7°C) plenum air. Therefore, the series fan-powered terminal must be sized to have the air valve deliver 715 cfm (337 L/s) of supply air at design conditions, but the fan must be sized to deliver 1000 cfm (472 L/s).
VAV-PRC012-EN 215
Application Considerations
Airside System Factors
A couple of system related factors should be noted as they apply to condensation.The first is the advantage the colder primary air has from a humidity standpoint. As noted in the description above, the low-temperature system operates at space relative humidity of 30–45% while a standard system operates at space relative humidity of 50–60%. The drier zone air means that the plenum air returning to the series terminal unit will also be drier and, therefore, less of a problem with condensation.
The second condensation factor to note is related to systems that shut down in the evening. Many people believe that immediately sending low-temperature primary air to these boxes that have been off for some time will cause a shock to the system and may cause condensation problems at startup. The solution to this has been the advent of gradual pull-down or “soft start” systems. In this type of system, the primary air temperature is higher on initial startup (typically 55°F(12.8°C)) and then gradually reduced to the normal operating point over the next 30 to 60 minutes.
Energy Savings & System Controls
Electrically Commutated Motor
The ECM provides an additional energy-saving option to the system designer. Some of the advantages of the motor include high efficiency, quiet operation, short payback, and easy installation. There are several considerations that need to be addressed when deciding whether to use these motors or not. The primary benefit may be seen as increased efficiency.
Operating Hours—The added cost of an ECM can be offset more quickly in applications which require a relatively high number of hours of operation. However, if a space does not require extensive running time for the unit fan, then it may not be a good candidate for this type of motor based solely on payback. Therefore, the decision about using the ECM may be based on other benefits, depending on the needs of the customer.
Airflow Flexibility—The ECM allows a greater airflow range per fan size. If a space is going to change uses and load components frequently, the ability to change supply airflow with the ECM without changing units will be a benefit.
Airflow Balancing—The ability of the ECM motor to self-balance to an airflow regardless of pressure can be an asset when trying to air balance a job. This will help eliminate additional dampers or changes to downstream ductwork to ensure proper airflow. For more information, please contact your local Trane sales engineer.
Fan-Pressure Optimization
WithTrane's Integrated Comfort System, the information from VAV terminal units can be used for other energy-saving strategies. Fan-pressure optimization is the concept of reducing the supply fan energy usage based on the position of the terminal unit dampers.
The control system allows this scenario. The system polls the VAV units for the damper position on each unit.The supply fan is modulated until the most wide-open damper is between 85% and
95% open.The correct airflow is still being sent to the zones since the controls of the VAV units are pressure-independent, and the fan modulates to an optimal speed and duct static pressure which results in fan energy savings.
216 VAV-PRC012-EN
Figure 17. Optimized static-pressure control
Application Considerations
Ventilation Reset
The Ventilation Reset control strategy enables a building ventilation system to bring in an appropriate amount of outdoor air per ASHRAE Standard 62.1. The basis for the strategy is measuring airflow at each zone, calculating current system ventilation efficiency using the multiple-zone system equations of the standard, and communicating a new outdoor airflow setpoint to the air handler.
This strategy continually monitors the zone ventilation needs and system outdoor air intake flow, minimizing the amount of ventilation air and increasing the energy efficiency of the system.This
insures that the right amount of air is brought in at all times and that proper ventilation can be documented. Trane has integrated this control ability into the VAV controls, air-handler controls, and building controls.
For more detailed information on these energy-saving strategies, please refer to the “Additional
References” section at the end of this chapter for appropriate material.
Figure 18. Ventilation reset
VAV-PRC012-EN 217
Application Considerations
Control Types
VAV terminal units are available with many different options. These options fall into three main categories of controls: direct digital (DDC), pneumatic, and analog electronic. All of these control types can be used to perform the same basic unit control functions, yet differences exist in accuracy of performance, versatility, installed cost, operating cost, and maintenance cost.
Direct Digital Control (DDC) Systems
Direct digital control (DDC) systems became available as advances in computer technology made small microprocessors available and affordable.
Much of the hardware in DDC systems is similar to analog electronic systems. The primary difference is that DDC controllers allow system integration, remote monitoring, and adjustment. The microprocessor is programmed using software that gives the controller a higher level of capability than either the pneumatic or analog electronic options.
Benefits:
Performance—DDC controls offer PI control capability. A PI control scheme is the most accurate and repeatable control scheme available in the VAV terminal unit industry.
Versatility—DDC controls accepts software commands to determine how its outputs will be controlled. When a control sequence must be modified, making changes to the software instructions is easier and quicker than changing hardware.
Operating and Maintenance Costs—DDC controls can be networked together to provide systemcontrol strategies for energy savings. Multiple controllers can be easily monitored and adjusted from a remote location. DDC controls also have system and individual diagnostic capability.
Disadvantages:
Versatility—The communications protocol between controllers will be different from one controller manufacturer to another.
Installed Cost—DDC controls are the most expensive of the three control types.
Operating and Maintenance Costs—Building personnel must be trained to operate and maintain the system.
Pneumatic Control Systems
Pneumatic control systems use compressed air through simple mechanical control devices, such as diaphragms, springs, and levers to change an output in response to a change in a monitored variable. With VAV terminal units, the output is typically a primary airflow and the monitored variable is zone temperature.
Benefits:
Performance—Pneumatic controls are a proven technology that is effective and has a long life cycle.
Installed Cost—When a source of compressed air exists at the facility, pneumatics generally have a lower installed cost than other types of controls when only a basic functionality is required.
Operating and Maintenance Costs—Pneumatics are still the most familiar control technology to many building designers and maintenance people.
218 VAV-PRC012-EN
Application Considerations
Large Installed Base—Pneumatic systems are very common in existing buildings.This eliminates the need to purchase the most expensive piece of equipment in a pneumatic control system—the control air compressor. Extensions to existing pneumatic systems are generally very simple and extremely cost-effective.
Disadvantages:
Performance—Pneumatic controls provide proportional-only control for VAV terminal unit systems.This control scheme is less accurate than the more advanced control schemes. Improper calibration of pneumatic controls leads to poor energy utilization.
Versatility—A central pneumatic control system, where each of the control zones can be monitored and adjusted from a remote location, is extremely costly to configure and to modify.
Operating and Maintenance Costs—Pneumatics easily drift and require constant upkeep and scheduled maintenance. Diagnostic capability for pneumatics is not available. A main compressor which is not maintained and becomes contaminated with oil or water can pump those contaminants into the compressed-air-distribution system.This may require costly cleaning of the system and a possible replacement of system components.
DDC Controls Basic Information
DDC controls have become the industry standard for VAV terminal unit control systems. DDC systems use electronic field devices such as a flow transducer, a primary air modulating damper, and an electronic thermostat.These field devices report software instructions of how the outputs are positioned in relation to the inputs to a controller.TheVariTranesystem uses a primary air valve and flow transducer for both DDC systems and analog electronic systems. However, the DDC zone sensor is different from the analog electronic thermostat.
DDC controls provide much flexibility and considerable diagnostic capability. DDC controllers can be connected together to form a network of controllers. Once the controllers are networked, they can be monitored for proper operation from a remote location. Commands and overrides can be sent for groups of controllers at one time to make system-wide changes. Commands and overrides can be sent to individual units to allow problem diagnosis, temporary shutdown, startup schedules or other specialized changes. When integrated into a building management system, the operation of the VAV terminal unit system can be modified to do such things, as coincide with occupancy schedules and reduce energy charges.
DDC control of VAV terminal units is a key element in providing intelligent and responsive building management. Precision control, flexible comfort, and after hours access are all available with the
VariTrane DDC control system for VAV terminal units.
Key features of the system include:
• An advanced unit controller
• Flexible system design
• User-friendly interaction
Pneumatic Controls Basic Information
Pneumatic controls modulate air pressure of a controller to maintain setpoint. For VAV systems, there are two primary types of pneumatic controllers—the room thermostat and the pneumatic volume regulator (PVR).
Room Thermostats
The most visible controller to the customer is the room thermostat. Pneumatic room thermostats can be classified by two characteristics: the tubing connection(s) to the thermostat and the action of the thermostat output in response to a change in the input.
Room thermostats are available in models that require a one-pipe or a two-pipe configuration.The
name is derived from the number of tubes that must run to the thermostat location.The difference
VAV-PRC012-EN 219
Application Considerations
is really in the construction of the thermostats.The two-pipe thermostats have a constant pressure supply connected via an air tube to the thermostat supply air port.The supply air travels through the thermostat’s relays, levers, diaphragm, and bleed port to produce an output. The output line is connected to the output port of the thermostat and extends to the controlled device. The onepipe thermostat has, as its name suggests, only one air line connection.The thermostat works by opening and closing an air bleed valve. This will either decrease or increase the pressure on the controlled device, which is connected to the same line that runs to the thermostat.
Room thermostats also can be classified by their reaction to a change in temperature. Room thermostats classified this way are denoted as either direct-acting or reverse-acting. Direct-acting thermostats will increase their output pressure as the temperature the thermostat measures increases.
Figure 19. Direct-acting thermostat response (L) and direct-acting thermostat response (R)
On the contrary, reverse-acting thermostats will decrease their output pressure as the temperature the thermostat measures increases.
Pneumatic Volume Regulators
These controllers accept the room thermostat signal and modulate the VAV terminal unit primary air damper.The primary air damper is controlled for an airflow setpoint that is determined by the room thermostat.The thermostat increases the PVR’s airflow setting when the temperature in the space is warm. On the other hand, the thermostat decreases the PVR’s airflow setting when the temperature in the space is cold.
Currently, VariTrane offers two models of pneumatic volume regulators in its controls offering— the 3011 regulator (used in most applications) and the 3501 model (used in dual-duct constantvolume applications). The primary difference is the 3501 PVR’s ability to change the velocity pressure linearly with a change in thermostat pressure, which results in improved stability at low flows. In contrast, the 3011 PVR resets the velocity pressure with a change in thermostat pressure.
Reset Control of Minimum and Maximum Flow—The 3011 PVR and 3501 use fixed reset control of minimum and maximum flow settings.The primary benefit of fixed reset in a pneumatic volume regulator is stable flow control without excessive damper movement.
Fixed Reset—A fixed reset controller operates over a thermostat signal change of 5 psi between minimum and maximum flow, regardless of the differential pressure flow sensor signal. The thermostat is usually set for a gain of 2.5; i.e. it produces a 2.5 psi output change per degree of space temperature change.This control strategy provides stable flow control with the primary air valve throttling between minimum and maximum flow over a 2°F space temperature change.
Example 1: Air valve with a 6" inlet, Pneumatic thermostat gain = 2.5 psi/degree:
Minimum Flow=0 cfm, 0.0 in. wg flow signal
Maximum Flow=680 cfm, 2.0 in. wg flow signal
2.0 in. wg signal range
220 VAV-PRC012-EN
Figure 20.
Application Considerations
The damper will modulate from zero to maximum position over a 2°F temperature change.
Bleed Port to Atmosphere—Bleeding air to the atmosphere is a normal operation for a volume regulator.The 3011 volume regulator addresses this function with a dedicated bleed port. When air is bled through the flow sensor, the differential pressure signal from the sensor is affected. As a result, the flow sensor signal can be radically altered if the volume regulator is bleeding air, and may cause excessive damper movement.
Calibration—The minimum and maximum settings are independent of each other and need to be set only once during calibration.
Signal Configuration Flexibility—Both can be configured to work with both normally-open and normally-closed pneumatic air valves, and both direct-acting and reverse-acting thermostats.
Pneumatic Volume Regulators
Flow Measurement and Control
One of the most important characteristics of a VAV terminal unit is its ability to accurately sense and control airflow. The VariTrane terminal unit was developed with exactly that goal in mind. The patented, multiple-point, averaging flow ring measures the velocity of the air at the unit primary air inlet.
The differential pressure signal output of the flow ring provides the terminal unit controller a measurement of the primary airflow through the inlet.The terminal unit controller then opens or closes the inlet damper to maintain the controller airflow setpoint
Flow Measurement
Most VAV terminal units contain a differential pressure airflow measurement device, mounted at the primary air inlet, to provide a signal to the terminal unit controller. Numerous names exist for the differential pressure measurement device—flow sensor, flow bar, flow ring. The differential pressure measured at the inlet varies according to the volumetric flow rate of primary air entering the inlet.
The total pressure and the static pressure are measurable quantities. The flow measurement device in a VAV terminal unit is designed to measure velocity pressure. Most flow sensors consist of a hollow piece of tubing with orifices in it.The VariTrane air valve contains a flow ring as its flow measuring device.The flow ring is two round coils of tubing. Evenly spaced orifices in the upstream
VAV-PRC012-EN 221
Application Considerations
Accuracy
coil are the high-pressure taps that average the total pressure of air flowing through the air valve.
The orifices in the downstream ring are low-pressure taps that average the air pressure in the wake of flow around the tube. By definition, the measurement of static pressure is to occur at a point perpendicular to the airflow.The low-pressure taps on the VariTrane flow ring measure a pressure that is parallel to the direction of flow but in the opposite direction of the flow.This “wake pressure” that the downstream ring measures is lower than the actual duct static pressure. The difference between the “wake pressure” and the static pressure can be accounted for so that the above relationship between flow and differential pressure remain valid.The difference also helps create a larger pressure differential than the velocity pressure. Since the pressures being measured inVAV terminal box applications are small, this larger differential allows transducers and controllers to measure and control at lower flow settings than would otherwise be possible.
The average velocity of air traveling through the inlet is expressed in the equation:
FPM
=
1096.5
Where:
FPM =
1096.5 =
VP =
DENS =
Velocity of air in feet per minute
A constant
The velocity pressure of the air expressed in inches of water
The density of the air expressed in pounds per cubic foot
Often, the density is assumed to be a constant for dry air at standard conditions (68°F (20°C)) and sea level pressure of 14.7 psi (101.4 kPa)). These conditions yield the following commonly used equation:
FPM
=
4005 VP
The velocity pressure is defined as the difference between the total pressure in the duct and the static pressure in the duct:
VP = TP - SP (All units are expressed in inches of water)
The amount of air traveling through the inlet is related to the area of the inlet and the velocity of the air:
AIRFLOW = AREA (square feet) x AVERAGE VELOCITY (feet per minute)
The multiple, evenly spaced orifices in the flow ring of the VariTrane terminal unit provide quality measurement accuracy even if ductwork turns or variations are present before the unit inlet. For the most accurate readings, a minimum of 1½ diameters, and preferably 3 diameters, of straightrun ductwork is recommended prior to the inlet connection.The straight-run ductwork should be of the same diameter as the air valve inlet connection. If these recommendations are followed, and the air density effects mentioned below are addressed, the flow ring will measure primary airflow within ±5% of unit nominal airflow.
222 VAV-PRC012-EN
Figure 21. Air pressure measurement orientations
Application Considerations
Air Density Effects
Changes in air density due to the conditions listed below sometimes create situations where the standard flow sensing calibration parameters must be modified.These factors must be accounted for to achieve accuracy with the flow sensing ring. Designers, installers, and air balancers should be aware of these factors and know of the necessary adjustments to correct for them.
Elevation
At high elevations the air is less dense.Therefore, when measuring the same differential pressure at elevation versus sea level the actual flow will be greater at elevation than it would be at sea level.
To calculate the density at an elevation other than standard conditions (most manufacturers choose sea level as the point for their standard conditions), you must set up a ratio between the density and differential pressure at standard conditions and the density and differential pressure at the new elevation.
P S dard Conditions
dard Conditions
=
Since the data from the manufacturer is published at standard conditions, this equation should be solved for the differential pressure at standard conditions and the other quantities substituted to determine the ratio for the differential pressure measured at the new conditions.
Duct Pressure and Air Temperature Variations
While changes in these factors certainly affect the density of air, most operating parameters which
VAV systems need keep these effects very small.The impact on accuracy due to these changes is less than one half of one percent except in very extreme conditions (extreme conditions are defined as those systems with static pressures greater than 5 in. wg (1245 Pa) and primary air temperatures greater than 100°F (37.8°C)). Since those types of systems occur so infrequently, we assume the effects of duct pressure and air temperature variations to be negligible.
VAV-PRC012-EN 223
Application Considerations
Linearity
With the increase in DDC controls over pneumatic controls, the issue of linearity is not as great as it once was. The important aspect of flow measurement versus valve position is the accuracy of the controller in determining and controlling the flow. Our units are tested for linearity and that position versus airflow curve is downloaded and commissioned in the factory to insure proper control of the unit.
Reheat Options
Figure 22. Hot water coil (L) & hot water valves (R)
224
Hot water heating coils are generally applied on VAV terminal units as reheat devices. When applying these coils it is important to make sure that they are operating in the proper air flow and water flow range. Either a two-way or a three-way valve controls the coils.
The most important factor when sizing valves is the coefficient of velocity or C
V
.The C
V is defined as the flow rate, in gallons of 60°F (15.56°C) water, that will pass through the valve in one minute with a one pound pressure drop. The coefficient of velocity, which is commonly called the flow coefficient, is an industry standard rating. Valves having the same flow coefficient rating, regardless of manufacturer, will have the same waterside performance characteristics.
The equation that governs valve sizing is:
Cv
=
P
Where
C v
=Flow coefficient
GPM=The maximum water flow rate through the valve in gallons per minute
P=The maximum allowable differential pressure across the valve in psi
The flow and differential pressure are generally the known quantities. The equation is solved for the flow coefficient.The flow coefficient is then compared to the published C
V values for the control valves that are available. The control valve with the C
V that is the closest, but greater than, the calculated flow coefficient is the correct choice for the control valve.This choice will keep the valve pressure drop below the maximum allowable valve pressure drop.The valve pressure drop should then be checked against the coil pressure drop. If the coil pressure drop is appreciably larger than the valve pressure drop, a valve with a smaller C
V should be selected to produce a larger control valve pressure drop. If this new valve has a pressure drop that is much larger than the maximum allowable pressure drop for valves, the system designer should be consulted to make sure that the system hot water pumps can deliver the water at the new conditions.
VAV-PRC012-EN
Application Considerations
Electric Reheat
Electric heating coils are applied onVAV terminal units as terminal reheat devices. Electric heat coil capacity is rated in kilowatts (kW). Coils are available with the total capacity divided into one, two, or three stages.
Electric heat coils are available in single-phase or three-phase models. This refers to the type of power source connected to the coil. Single-phase models have resistance elements internally connected in parallel. Three- phase models have resistance elements internally connected in a delta or a wye configuration.
The current draw for the electric coil will depend upon whether it is a single-phase coil or a threephase coil.The current draw is necessary for determining what size wire should be used to power the electric coils and how big the primary power fusing should be.
The equations for current draw for these coils are:
1amps
=
3amps
=
PrimaryVoltage 3
VariTrane three-phase electric heat is available in balanced configurations. For example, a 9 kW three-phase coil, each stage would carry 1/3 or 3 kW of the load.
It is important to note that these coils have certain minimum airflow rates for each amount of kW heat the coil can supply to operate safely. These airflow values are based upon a maximum rise across the electric heat coil of 50°F (28°C).
The equation that relates the airflow across an electric coil to the temperature rise and the coil change in temperature is:
CFM
=
Where
CFM=Minimum airflow rate across the coil kW=The heating capacity of the electric coil
3145=A constant
P=The maximum rise in air temperature across the coil (usually 50 degrees F (28 degrees C))
Electric heat coils are available with magnetic or mercury contactors. Magnetic contactors are less expensive than mercury contactors. However, mercury contactors can be cycled at a more rapid rate without failing. Mercury contactors are rated for heavier duty use and should be used in as many applications as possible. For pneumatic applications the electric coils are available with factory-installed pressure-electric switches.
VAV-PRC012-EN 225
Application Considerations
Insulation
Encapsulated edges
Insulation in aVAV terminal unit is used to avoid condensation on the outside of the unit, to reduce the heat transfer from the cold primary air entering the unit, and to reduce the unit noise.
The VariTrane line offers four types of unit insulation.The type of facing classifies the types of insulation. To enhance IAQ effectiveness, edges of all insulation types have metal
encapsulated edges.
Acoustics
Matte-Faced
This type of insulation is used for typical applications. It consists of a fiberglass core covered by a high-density skin.The dual-density construction provides good sound attenuation and thermal performance.
Foil-Faced
This type of insulation is used in applications where there is some concern regarding airborne contaminants entering the space, or dirt being trapped in the fibers of the insulation.The insulation is composed of a fiberglass core laminated to a foil sheet. Foil-faced insulation will provide the same sound attenuation performance as matte-faced insulation.
Double-Wall
This type of insulation is used in applications where there is extreme concern regarding airborne contaminants entering the space or dirt being trapped in the fibers of the insulation.The insulation is the same as the matte-faced insulation. However, after the insulation is installed, a second solid wall of 26-gage steel covers the insulation. All wire penetrations of this insulation are covered by a grommet. This type of insulation will result in higher discharge and radiated sound power.
Closed-Cell
This type of insulation is used in applications where IAQ and fibers are of primary concern. The acoustics of the closed-cell insulation are similar to double-wall insulation.The thermal properties are similar to fiberglass insulation. This insulation contains no fiberglass.
Acoustical Best Practices
Acoustics with terminal units is sometimes more confusing than it needs to be. As we know, lower velocities within a unit leads to improved acoustical performance. Additionally, if the VAV terminal unit has a fan, a lower RPM provides better Acoustical performance. It is as simple as that—there are some catches, however.
Additional considerations will be discussed in more detail throughout this portion of Application
Considerations, such as unit size and type, appurtenance affects (due to insulation, attenuation, etc.), certification, and computer modeling. Let’s take a look at the first consideration, sizing of units.
226 VAV-PRC012-EN
Application Considerations
VAV-PRC012-EN
Sizing of Units
Before blindly increasing the size of units, we must first understand what is setting the acoustics within the space. In general, over 95% of acoustics in VAV terminal units, which set the sound pressure levels and ultimately the NC within the space, is from radiated sound. This is readily known for fan-powered units, but less commonly known for single- and dual-duct units. Radiated sound emanates from the unit and enters the occupied space via means other than through the supply ductwork.The most typical path is through the plenum space, then through the ceiling, then into the occupied space. While discharge sound should never be ignored, radiated sound is the most dominant and usually the most critical sound source.
When increasing air valve sizes, BE CAREFUL. Oversizing an air valve can adversely impact
the ability to modulate and properly control temperature in the space. In extremely oversized situations, the air valve will operate like a two-position controlled device, with air either being “on”,or “off”,and not really much in between.The best way to avoid this is to understand that the minimum for most air valves is 300 FPM.This is a function of the flow sensing device and the ability of the pressure transducer and controller to properly read and report flow. This is not manufacturer specific, as physics applies to all.Therefore, when sizing air valves, regardless of the max cooling velocity the minimum velocity for proper pressure independent flow is 300 FPM.
Modulation capability and range is vital for proper operation of VAV systems. With oversized units, the unit will act as a constant volume system eliminating the energy savings and individual zone control advantages ofVAV systems. A good rule of thumb is to size cooling airflow for around 2000
FPM. VAV systems only operate at full flow when there is a maximum call for cooling in the zone.
The greatest portion of the time, an air valve will be operating at partial flows.
When sizing fan-powered units, the fan airflow range can be determined by looking at the fancurve. Because parallel and series fan-powered units operate at a constant fan flow, selections can be made all the way to the lowest flow ranges of the fan curve. A good balance of performance and cost is to select fans at 70-80% of maximum fan flow.
Series vs. Parallel Fan-Powered Units
Acoustical considerations may affect whether a series or parallel fan-powered terminal unit is selected. Both units have their advantages.
The parallel unit has the advantage of fan energization and fan acoustical impact only when heating is needed. Parallel fans are smaller than series units because they are sized for 30–60% of total unit flow.This creates a unit which is quieter than series units.The disadvantage of the parallel unit is intermittent sound.This impact can be minimized by using an ECM, which has slow fan ramp-up speed.
The primary acoustic benefit to the series fan-powered unit is that the fan runs continuously.
Sometimes the unit can be selected at slightly higher sound levels due to the constant nature of the sound.
The primary acoustic disadvantage the series unit has compared to the parallel unit is the need to size the unit fan for the total room airflow. Series units require a larger, louder fan than parallel configurations.
Note: Operating parallel units with a continuously operating fan may be considered for some
applications. This provides the quietest overall fan-powered system with the benefit of continuous fan operation. See your local Trane sales engineer for more details.
Insulation types
Insulation is a factor to consider when dealing with the acoustics of terminal units. Most insulation types will provide similar acoustical results, but there are exceptions. Double-wall and closed-cell foam insulation will generally increase your sound levels because of the increased reflective surface area that the solid inner-wall and closed-cell construction provides.This increase in sound will have to be balanced with the IAQ and cleanability considerations of the dual-wall and closedcell construction.
227
Application Considerations
Placement of units
Unit placement in a building can have a significant impact on the acceptable sound levels. Locating units above non-critical spaces (hallways, closets, and storerooms) will help to contain radiated sound from entering the critical occupied zones.
Unit Attenuation
Terminal unit-installed attenuators are an option available to provide path sound attenuation.
Manufacturer-provided attenuators on the discharge of a terminal unit are targeted at reducing discharge path noise and are typically a simple lined piece of ductwork. It would often be easier and less expensive to design the downstream ductwork to be slightly longer and require the installing contractor to include lining in it. Attenuators on the plenum inlet of fan-powered terminals are targeted at reducing radiated path noise since the plenum opening on a fan-powered terminal unit is typically the critical path sound source. Significant reduction in radiated path noise can result from a well-designed inlet attenuator. The attenuation from these attenuators is due to simple absorption from the attenuator lining and occupant line of sight sound path obstruction.Therefore, longer attenuators and attenuators that require the sound to turn multiple corners before reaching the occupied space provide superior results, particularly in the lower frequency bands.
Table 141. Octave band frequencies
Octave Band
1
2
5
6
3
4
7
8
Center Frequency
63
125
250
500
1000
2000
4000
8000
Band Edge Frequencies
44.6-88.5
88.5-177
177-354
354-707
707-1414
1414-2830
2830-5650
5650-11300
Attenuators that are simple “cups” at the plenum inlet(s) have been shown in Trane’s acoustical mock-up to provide no measurable reduction in sound pressure in the critical octave bands which set the occupied space noise criteria.
Certification and Testing
Terminal units should be submitted based on the same criteria.There are several ways to ensure this by certification and testing.
Raw unit sound data can be good measurement criteria for evaluation. In using this as a basis for comparison, the designer needs to make sure that the information is based on the AHRI Standard
880 that gives the procedure for testing.
Specifying NC or RC sound levels is a possible comparison, but the designer needs to be sure the comparison is fair. Two options are to specify the attenuation effect on which you would like the units to be evaluated or to specify that AHRI Standard 885-2008 transfer functions be used. The importance of AHRI Standard 885-2008 is that it is the first AHRI Standard that specifies exact transfer functions to be used for evaluation. Previous versions of the standard gave guidelines, but the manufacturers could choose their own set of factors.
228 VAV-PRC012-EN
Application Considerations
VAV-PRC012-EN
By using NC sound levels, it is possible to express acceptable sound levels for various types of buildings or environments. A few examples are:
Concert Hall
Hospital Room
School Room
General Office
Cafeteria
Factory
NC-22
NC-30
NC-35
NC-40
NC-45
NC-65
Path Attenuation
Sound is generated by a terminal unit can reach the occupied space along several paths. The terminal unit generated sound will lose energy—i.e., the energy is absorbed by path obstacles— as it travels to the occupied space.This acoustical energy dissipation as it travels to the occupied space is called path attenuation. The amount of energy lost along a particular path can be quantified and predicted using the procedure outlined in AHRI-885. Each path must be considered when determining acceptable sound power generated by a terminal unit.
The term “transfer function” is often used to describe the entire path attenuation value for each octave band (i.e., the sum of all components of a particular path).
Examples of path attenuation include locating the terminal unit away from the occupied space, increasing the STC (sound transmission classification) of the ceiling tile used, internally lining ductwork, drywall lagging the ceiling tiles or enclosing the terminal unit in drywall. All of these choices have costs associated with them that must be weighed against the benefits. Some of these alternatives can be acoustically evaluated from application data provided in AHRI-885. Others may require professional analysis from an acoustical consultant.
229
Application Considerations
Computer Modeling
Computer modeling of acoustical paths is available to help estimate sound levels and determine problem sources. The software used by Trane for computer modeling is called Trane Acoustics
Program (TAP™).
TAP can analyze different room configurations and materials to quickly determine the estimated total sound levels (radiated and discharged) in a space.TheTrane Official Product Selection System
(TOPSS™) can also be used to determine sound levels of terminal units.You can base selections on a maximum sound level and enter your own attenuation factors (defaults based on AHRI-885 are also available).
Other Resources
Refer to "Additional References" at the end of this chapter to see a list of publications to help with the basics of acoustical theory and modeling. You can also contact your local Trane salesperson to discuss the issue.
Duct Design
Designing cost-effective VAV duct systems is challenging. Some duct design methods result in better pressure balance than others do. Duct shape and duct material can influence duct system design and cost. In addition, duct layout is properly designed for optimal duct installation and operation.
Duct Design Program
Trane has developed a computer program, VariTrane™ Duct Designer, to aid in the duct design process.This program is used to calculate duct sizes, fitting sizes, terminal unit sizes, and pressure drops according to the equal friction or static regain method. The duct design program can be easily incorporated into the selection ofVAV terminal units.The inputs and outputs for the program enableVariTrane units to be selected based on the conditions you require.This makes selecting and scheduling units much easier. Contact the local sales office or the Trane C.D.S.™ department for more details on this program.
Design Methods
The two most widely used supply duct design methods—equal friction and static regain—are discussed below.
Equal Friction – Using this method, ducts are sized at design flow to have roughly the same static pressure drop for every 100 feet of duct. Static pressures throughout the duct system can be balanced at design flow using balancing dampers, but are no longer balanced at part load flows.
For this reason, equal friction duct designs are better suited for constant volume systems than for
VAV systems. If the equal friction method is used for theVAV supply duct design, the terminal units usually require pressure-independent (PI) control capability to avoid excessive flow rates when duct pressures are high.
In VAV systems, the ducts located downstream of the terminal unit are usually sized for equal friction. The advantage of this design method is its simplicity. Often, calculations can be made using simple tables and duct calculators. Drawbacks include increased higher total pressure drops and higher operating costs.
Static Regain – In the static regain method, ducts are sized to maintain constant static pressure in each section, which is achieved by balancing the total and velocity pressure drops of each section. In other words, static pressure is “regained” by the loss of velocity pressure. Since the static pressures throughout the duct system are roughly balanced at design and part load flow, static regain duct designs can be used successfully for either constant volume or VAV systems.
When the static regain method is used for VAV systems, the system is roughly pressure balanced at design.
230 VAV-PRC012-EN
Application Considerations
Advantages of the static regain method include reduced total pressure drops, lower operating costs, and balanced pressures over a wide range of flows.The drawback of this design is the timeconsuming, iterative calculation procedure and for large systems, it is essential to have a duct design computer program.
Best Practices
Common Mistakes
Some of the most common system or installation errors are discussed below.
Reducers at Unit Inlet
This problem is a very common issue that is seen in applications of VariTrane products. It is often mistaken by those in the field as an unacceptably large static pressure drop through the unit. It is also sometimes mistaken as a malfunctioning flow ring, pressure transducer (if DDC or analog electronic controls are present) or PVR (if pneumatic controls are present).
This problem is sometimes unknowingly encountered because of the capability of the VariTrane unit to allow greater airflow for a specific size duct than other terminal units. For example, a project engineer specifies an 8" (203 mm) round take off from the main duct trunk to the VAV terminal unit.
The person supplying the VAV terminal unit checks the required airflow and finds that a VariTrane unit with a 6" (152 mm) inlet will provide the specified terminal unit performance.The terminal unit supplier submits, receives approval, and orders the 6" (152 mm) inlet unit.While this is happening, the installing contractor has run the connecting duct from the main trunk to the terminal unit in the specified 8" (152 mm) round.The unit arrives at the job site, and the installer notices that the 8" (203 mm) duct and the 6" (152 mm) terminal unit inlet do not match. To get the unit installed, an 8- to
6-inch reducer is placed at the inlet to the terminal unit air valve.
The reducer will cause a phenomenon called flow separation at the unit inlet. Fluid dynamics analysis can present a detailed technical explanation of flow separation, but the characteristics important to this discussion are the production of pressure loss and turbulence.The reducer will have a significant static pressure drop associated with it since the air velocity is increased (i.e., static pressure is given up for increased velocity pressure). The pressure loss is sometimes mistaken as a loss due to the function of the terminal unit. The turbulence is at its greatest just downstream of the reducer. Unfortunately, this is the location of the flow ring at the air-valve inlet.
The reducer will cause the flow ring to give an inaccurate and inconsistent reading because of the turbulent air.
The solutions to this situation are:
• Locate the reducer upstream of the terminal unit at least three duct diameters to eliminate flow separation and turbulence at the unit inlet and to improve the airflow measurement accuracy.
• Consider proper sizing of the terminal unit in the duct design and account for the pressure loss of the reducer in the central fan selection if a reducer is required. Be cautious of “oversizing” a VAV terminal. It is good practice to make sure that the inlet duct velocity at the minimum airflow setting is no lower than 500 feet per minute.
Improper Use of Flexible Ductwork
While flexible ductwork has many benefits, improper use can cause numerous problems in a VAV system. Flexible ductwork causes turbulent airflow and relatively large static pressure drops.
Flexible ductwork at a primary damper inlet (i.e., the flow sensor location) may cause flow accuracy and repeatability problems due to turbulence. The use of flexible ductwork should be primarily limited to the downstream side of the terminal units in a VAV system. Use of flexible ductwork upstream of terminal units should be kept to an absolute minimum. All runs of flexible ductwork should be kept as short as possible. While most know these guidelines, the ease of installation which flexible ductwork provides is always an enticement to push the limits of what are acceptable practices.
VAV-PRC012-EN 231
Application Considerations
Static Pressure Measurement Errors
Improper measurement techniques for static pressure can lead many to mistakenly believe that the terminal unit is causing a large pressure drop in the system.The chief error made here is taking a static pressure measurement in turbulent locations such as flexible ductwork or near transitions.
This produces invalid static pressure readings. Another error commonly made is trying to read the static pressure at the same point as the flow sensing device. The inlets to VAV terminal units produce turbulence and will give poor readings. Flow sensors with their multiple-point averaging capability are best equipped to deal with this type of flow, while a single-point static probe is not.
Another common error is the incorrect orientation of the static pressure probe.The static pressure is correctly measured when the probe is oriented perpendicular to the direction of airflow. The probe, or a part of it, should never be facing the direction of airflow, because the total pressure will influence the reading of the probe.
Unit Conversions
Table 142. Conversions of length and area
To convert
Length
Length
Length
Length
Area
Area
Area
Area
From
In.
Ft m m
In.
2
Ft
2 m
2 m
2
To
m m
In.
Ft m
2 m
2
In.
2
Ft2
Multiply by
0.0254
0.3048
39.3701
3.28084
0.00064516
0.092903
1550
10.7639
Table 143. Conversions of velocity, pressure, and flow rate
To convert
Velocity
Velocity
Pressure
Pressure
Pressure
Pressure
Pressure
Pressure
Flow Rate
Flow Rate
Flow Rate
Flow Rate
Flow Rate
Flow Rate
From
Ft/min
M/s
Psi
Ft of water
In. of water
Pa
Pa
Pa
Cfm
Cfm
Gpm m
3
/s
L/s
L/s
To
M/s
Ft/min
Pa
Pa
Pa
Psi
Ft of water
In. of water
L/s m
3
/s
L/s
Cfm
Cfm
Gpm
Multiply by
0.00508
196.850
6894.76
2988.98
249.082
0.000145038
0.000334562
0.00401474
0.4719
0.000471947
0.0630902
2118.88
2.1191
15.8503
232 VAV-PRC012-EN
Application Considerations
Additional VAV System and Product References
VAV Systems Air Conditioning Clinic
This clinic is designed to explain the system components, the system configurations, many of the
VAV system options and applications. A great resource for VAV system understanding.
Literature Order Number: TRG-TRC014-EN
Indoor Air Quality – A guide to understanding ASHRAE Standard 62-2001
The guide helps to explain the ASHRAE Standard as well as the fundamentals of good indoor air quality. A great resource for understanding the standard and ways of designing VAV systems around that standard.
Literature Order Number: ISS-APG001-EN
Managing Outdoor Air – Traq™ Comfort Systems
This brochure is a good, quick reference of the issues of managing outdoor air for a VAV system.
Literature Order Number: CLCH-S-26
Ventilation and Fan Pressure Optimization for VAV Systems
An engineering bulletin designed to how a Trane Integrate Comfort™ system can effectively control building ventilation and supply fan pressure for increased comfort and IAQ while keeping energy costs to the lowest possible.
Literature Order Number: SYS-EB-2
Trane DDC/VAV Systems Applications Engineering Manual
This manual gives detailed descriptions of the Trane DDC/VAV system. Topics include system components, how the system interacts and specific inputs and outputs of the system.
Literature Order Number: ICS-AM-6
Acoustics in Air Conditioning Applications Engineering Manual
This manual describes the basic fundamentals, behavior, measurement, and control of sound, all directed at the design of quiet systems.
Literature Order Number: FND-AM-5
VariTrac
®
Catalog
The catalog will help explain features and benefits of VariTrac, how the VariTrac product works, applications for the product, and selection procedures.
Literature Order Number: VAV-PRC003-EN
ASHRAE Handbook of Fundamentals
ASHRAE Handbook of HVAC Systems and Equipment
ASHRAE Handbook of HVAC Applications
ASHRAE Handbook of Refrigeration
Web sites:
• www.ashrae.org
• www.ahrinet.org
• www.trane.com
VAV-PRC012-EN 233
Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.
Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
© 2013 Trane All rights reserved
VAV-PRC012-EN 16 Jul 2013
Supersedes VAV-PRC012-EN (23 Jun 2013)
We are committed to using environmentally conscious print practices that reduce waste.
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