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)

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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.

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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.

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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.

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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.

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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.

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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

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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.

Table

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

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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.

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