Carrier AQUAZONE 50RHC Product data

Product
Data
50RHC, 50RVC
Standard Efficiency
Water Source Heat Pumps
Horizontal — 11/2 to 5 Nominal Tons
Vertical — 11/2 to 5 Nominal Tons
TM
Single-Package Horizontally and Vertically Mounted Water Source Heat
Pumps with Electronic Controls.
• Compact cabinet design
• Performance certified to ASI/ISO/
ASHRAE 13256-1
• Waterloop (boiler/tower) application
use with an operating temperature
range of 60 F to 95 F
• Simplified refrigeration circuit
provides efficient and reliable
refrigerant flow
• Mute package available for quiet
operation
• Three service panels for
compressor section for easy
maintenance
• Meets new ASHRAE 90.1 performance requirements
• Backward compatibility for replacing older Carrier and other
manufacturers’ units
• Flexible and reliable controls
accommodate all systems
Features/Benefits
Carrier’s Aquazone™
standard efficiency water
source heat pumps are an
efficient, compact alternative
for all boiler/tower and
retrofit applications
Operating efficiency
Carrier horizontal and vertical water
source heat pumps are designed for
quality and high performance over a
lifetime of operation. Aquazone
standard efficiency units offer cooling
EERs to 13 and heating COPs to 4.6.
Efficiency ratings stated are in accordance with standard conditions under
ISO (International Organization for
Standardization) Standard 13256-1
and provide among the highest ratings
Copyright 2002 Carrier Corporation
Form 50RHC,RVC-1PD
in the industry, exceeding ASHRAE
(American Society of Heating, Refrigerant and Air Conditioning Engineers)
90.1 Energy Standards.
High quality construction and
testing
All units are manufactured to meet extensive quality control standards. An
automated control system provides
continuous monitoring of each unit
and performs quality control checks as
equipment progresses through the production process. Standard construction
features of the Carrier Aquazone™
units include:
Cabinet — Heavy gage galvanized
sheet metal cabinet construction enables part standardization (i.e., minimal
number of parts) and modular design.
Cabinet interior surfaces are lined with
1/ in. thick, 11/ lb. acoustic type in2
2
sulation. Sheet metal surfaces are
treated for maximum corrosion protection to ensure resilience for long term
vitality. Compact cabinet dimensions
fit tight space limitations in both horizontal and vertical configurations.
Compressor — Aquazone standard
efficiency units include a reciprocating
compressor in sizes 018 through 060.
Compressors are mounted on an isolated system (i.e., from the cabinet)
that maximizes vibration isolation and
minimizes transmission to the unit
structure.
Blower and motor assembly —
Permanent split capacitor (PSC) threespeed blowers are provided with all
units to satisfy many air distribution
applications. Blower upgrades are
available for high static conditions. Fan
speed control allows reduced sound
operation. Blowers also provide dehumidification control with the correct
controller option. Blower motors operate at lower temperatures to help improve the reliability of the water source
heat pump.
Refrigeration/water circuit —
Units have a sealed refrigerant circuit
including a reciprocating compressor.
Simplified refrigerant circuits provide
easy maintenance, higher accuracy
and excellent performance. Also
standard are a reversing valve (4-way
valve), water-to-refrigerant coaxial
(tube in tube) coil, and enhanced
aluminum fin/rifled copper tube air to
refrigerant heat exchanger coil.
ARI/ISO — Aquazone units have ARI
(Air Conditioning & Refrigeration Institute)/ISO, NRTL (Nationally Recognized Testing Lab), or CSA (Canadian
Standards Association) labels and are
factory tested under normal operating
conditions at nominal water flow rates.
Quality assurance is provided via testing report cards shipped with each unit
to indicate specific unit performance
under cooling and heating modes.
Water source heat pumps are New
York City MEA (Materials Equipment
and Acceptance) 60-00-E rated.
Quiet operation
Fan motor insulation and compressor
springs provide sound isolation, cabinets are fully insulated to reduce noise
transmission, low speed blowers are
used for quiet operation through
reduced outlet air velocities, and air-torefrigerant coils are designed for lower
airflow coil face velocities.
Design flexibility
Airflow configurations for horizontal
units are available in four patterns including left or right return, and left,
right, or back discharge. Horizontal
units are field convertible from left or
right discharge to back discharge.
Vertical units are available in four airflow patterns including top discharge
with front, right or left return.
Standard water temperature range between 60 F and 95 F offers maximum
design flexibility for boiler/tower applications. Water flow rates as low as
1.5 gpm per ton assist with selection
from a various range of circulating
pumps. Factory-installed options are
offered to meet specific design
requirements.
Safe, reliable operation
Standard safety features for the refrigerant circuit include a high-pressure
switch, low-pressure sensor to detect
refrigerant loss and low air temperature sensor to safeguard against freezing. Equipment safety features include
water loop temperature monitoring,
voltage protection, water coil freeze
protection, and standard electronic
condensate overflow shutdown. All
safety features are tested and run at the
factory to assure proper operation of
all components and safety switches.
Table of contents
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ARI/ISO Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10,11
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12,13
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-23
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26,27
Typical Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29-32
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33-36
2
NRTL/C
As an ENERGY STAR® Partner, Carrier Corporation has
determined that this product
meets the ENERGY STAR
guidelines for energy efficiency.
Features/Benefits (cont)
All components are carefully designed and selected for endurance,
durability, and carefree day-to-day
operation.
The Aquazone™ unit is shipped to
provide internal and external equipment protection. Shipping supports
are placed under the blower housing
and compressor feet. In addition, horizontal and vertical units are both
mounted on oversized pallets with lag
bolts for sturdiness and maximum protection during transit.
Ease of installation
The Aquazone unit is packaged for
simple low cost handling and require
minimal installation. All units are prewired and factory charged with refrigerant. Horizontal units include factoryinstalled hangar isolation brackets. Vertical units have an internally trapped
condensate drain to reduce labor associated with installing an external trap
for each unit. Water connections (FPT)
and condensate drains (FPT) are
anchored securely to the unit cabinet.
Simple maintenance and
serviceability
The Aquazone WSHP units are constructed to provide easy maintenance.
All units allow access to the compressor section from 3 sides and have large
removable panels for easy access. Additional panels allow access to the
blower and control box sections.
The blower housing assembly can be
serviced without disconnecting ductwork from the dedicated blower access
panel. Blower units come with permanently lubricated bearings for worryfree performance. Blower inlet rings
allow blower wheel removal without
having to remove the housing or
ductwork connections.
Electrical disconnection of the blower motor and control box is easily accomplished via quick disconnects on
each component.
Easy removal of the control box
from the unit provides access to all
refrigeration components.
The refrigeration circuit is easily
tested and serviced through high and
low pressure ports integral to the
refrigeration circuit.
Maximum control flexibility
Aquazone water source heat pumps
provide reliable control operation using
a standard microprocessor board with
flexible alternatives for many direct digital control (DDC) applications including the Carrier Comfort Network
(CCN) and open protocol systems.
Carrier’s Aquazone standard unit
solid-state control system, the Complete C, provides control of the unit
compressor, reversing valve, fan, safety
features, and troubleshooting fault indication features. The Complete C is
one of the most user friendly, low cost,
and advanced control boards found in
the WSHP industry. Many features are
field selectable to provide the ultimate
in field installation flexibility. The overall features of this standard control system include:
50VA transformer — Assists in accommodating accessory loads.
Anti-short cycle timer — Provides a
minimum off time to prevent the unit
from short cycling. The 5-minute timer
energizes when the compressor is
deenergized, resulting in a 5-minute
delay before the unit can be restarted.
Random start relay — Ensures a
random delay in energizing each different WSHP unit. This option minimizes
peak electrical demand during start-up
from different operating modes or after
building power outages.
High and low pressure refrigerant
protection — Safeguards against unreliable unit operation and prevents refrigerant from leaking.
Condensate overflow sensor —
Electronic sensor mounted to the drain
pan. When condensate pan liquid
reaches an unacceptable level, the unit
is automatically deactivated and placed
in a lockout condition. The sensor
recognizes 30 continuous seconds of
overflow as a fault condition.
High and low voltage protection
— Safety protection from excessive or
low voltage conditions.
Automatic intelligent reset — Unit
shall automatically restart 5 minutes after shutdown if the fault has cleared.
Should a fault occur 3 times sequentially, lockout will occur.
Accessory output — 24 V output
is provided to cycle a motorized water
valve or damper actuator with compressor in applications such as variable
speed pumping arrangements.
Performance Monitor (PM) —
Unique feature monitors water temperatures to warn when the heat pump is
operating inefficiently or beyond typical operating range. Field selectable
switch initiates a warning code on the
unit display.
Water coil freeze protection (selectable for water or antifreeze) —
Field selectable switch for water and
water/glycol solution systems initiates
a fault when temperatures exceed
the selected limit for 30 continuous
seconds.
Air coil freeze protection (check
filter operation) — Field selectable
switch for assessing excessive filter
pressure drop. The switch initiates a
fault when temperatures exceed the selected limit for 30 continuous seconds.
Alarm relay setting — Selectable
24 V or pilot duty dry contact for activating a remote alarm.
Electric heat option — Output provided on the controller for operating
two stages of emergency electric heat.
Service test mode with diagnostic LED (light-emitting diode) —
The Test mode allows service personnel to check the operation of the
WSHP and control system efficiently.
Upon entering Test mode, time delays
speed up, and the Status LED flashes a
code to indicate the last fault experienced. This mode provides easy fault
diagnosis; based on the fault code that
the status LED flashes, Carrier troubleshooting tables provide easy reference
to typical problems.
LED visual output — An LED panel
indicates high pressure, low pressure,
low voltage, high voltage, air/water
freeze protection, condensate overflow, and control status.
3
Features/Benefits (cont)
Carrier PremierLink™ controller adds reliability, efficiency,
and simplification
The PremierLink direct digital controller can be ordered as a factoryinstalled option. Designed and manufactured exclusively by Carrier, the
controller can actively monitor and
control all modes of operation as well
as monitor the following diagnostics
and features: unit number, zone temperature, zone set point, zone
humidity set point, discharge air temperatures, fan status, stages of heating,
stages of cooling, outdoor-air temperature, leaving-air temperature, leaving
water temperature, alarm status, and
alarm lockout condition.
This controller has 38.4K baud communications capability and is compatible with ComfortLink™ Controls,
CCN and ComfortVIEW™ Software.
The Scrolling Marquee and Navigator
are optional tools used for programming and monitoring the unit for optimal performance. Adding the Carrier
CO2 sensor in the conditioned space
provides ASHRAE 62-99 compliance
and Demand Control Ventilation
(DCV). A DCV control strategy is especially beneficial for a water source heat
pump system to minimize the energy
used to condition ventilation air. In
combination with energy efficient
Aquazone units, DCV may be the most
energy efficient approach ever developed for a water source heat pump
system.
The PremierLink peer-to-peer,
Internet ready communicating control
is designed specifically for CV
(Constant Volume) and VVT® (Variable Volume/Variable Temperature)
applications. This comprehensive controls system allows water source heat
pumps to be linked together to create a
fully functional HVAC (heating, ventilation, and air conditioning) automation
system.
Model number nomenclature
50RHC,RVC STANDARD EFFICIENCY
50RH
C
018
S C
C
3
0
1
3
0
Aquazone™ Water Source Heat Pump
50RH – Horizontal Configuration
50RV – Vertical Configuration
Water Circuit Options
0 – None
Efficiency Type
C – Standard efficiency
Size – Nominal Tons
018 – 1-1/2
024 – 2
030 – 2-1/2
036 – 3
041* – 3-1/2
042 – 3-1/2
048 – 4
060 – 5
Operating Range
3 – Standard Range (60 to 95 F)
4 – Standard Range (60 to 95 F)
with Mute Package
Packing
1 – Single Pack
Airflow Configuration
50RHC Units
Code
Return Discharge
S
Left
Right
E
Left
Back
Z
Right
Left
B
Right
Back
50RHC-High Static Units
Code
Return Discharge
D
Left
Right
F
Left
Back
A
Right
Left
C
Right
Back
50RVC Units
Code
Return
†F
Front
L
Left
R
Right
50RVC-High Static Units
Code
Return Discharge
M
Left
Top
G
Right
Top
†H
Front
Top
Discharge
Top
Top
Top
Controls
C – Complete C Microprocessor Control
D – Deluxe D Microprocessor Control
**P – PremierLink™ DDC Control
*Vertical only.
†Available in sizes 018-030 only.
**Available with Complete C only.
4
Revision Code
0 – Current Revision
V-Ph-Hz
1 – 575-3-60
3 – 208/230-1-60
4 – 265-1-60
5 – 208/230-3-60
6 – 460-3-60
Heat Exchanger
C – Copper
N – Cupro-Nickel
Options and accessories
Factory-installed options
Cupronickel heat exchangers are available for higher
corrosion protection for applications such as open tower,
geothermal, etc. Consult the water quality guidelines for
proper application and selection of this option.
Sound attenuation package (mute package) is available for applications that require especially low noise levels. With this option, a double application of sound attenuating material is applied to the internal divider, side panels,
top and bottom panels. The mute package in combination
with standard unit noise reduction features (i.e., as mentioned previously) provides sound levels and noise reduction to the highest degree.
High static blower is available in all sizes for the
50RHC,RVC units. This option specifically increases airflow at various static pressure conditions, providing even
more flexibility to Carrier’s high blower performance
offered by the standard models.
Deluxe D control system provides the same functions
as the Complete C control system while incorporating
additional flexibility and functions including:
Thermostat input capabilities — Accommodate emergency
shutdown mode and night setback with override (NSB)
potential. Night setback from low temperature thermostat
with 2-hour override is initiated by a momentary signal
from the thermostat.
Compressor relay staging — Used with dual stage units
(units with 2 compressors and 2 Deluxe D controls) or in
master/slave applications.
Boilerless electric heat control system — Allows automatic
changeover to electric heat at low loop water temperature.
Intelligent reversing valve operation — Minimizes reversing
valve operation for extended life and quiet operation.
Thermostat type select (Y, O or Y, W) — Provides ability to
work and select heat pump or heat/cool thermostats (Y, W).
Reversing valve signal select (O or B) — Provides selection
for heat pump O/B thermostats.
Dehumidistat input — Provides fan control for dehumidification operation.
Multiple units on one thermostat/wall sensor — Provides
communication for up to three heat pumps on one
thermostat.
Boilerless changeover temperature — Provides selection of
boilerless changeover temperature set point.
Accessory relays — Allow configuration for multiple applications including fan and compressor cycling, digital night
setback (NSB), mechanical night setback, water valve operation, and outside air damper operation.
PremierLink™ controller is compatible with the Carrier
Comfort Network (CCN) and other building automation
systems (BAS). This control allows users the access and
ability to change factory-defined settings, thus expanding
the function of the standard unit.
Field-installed accessories
Programmable 7-day thermostat — Offers 2-stage heat,
2-stage cool, auto changeover, 7-day programmable with
copy command, 4 settings per day, fully electronic, 24 vac,
backlit LCD, keypad lockout, no batteries required,
5-minute compressor protection, NEVERLOST™ memory,
3 security levels, temperature display in degrees F or C.
Programmable 7-day light-activated thermostat — Offers
same features as the 7-day programmable thermostat.
Includes occupied comfort settings with lights on and unoccupied energy savings with lights off.
Programmable 7-day flush-mount thermostat — Offers
same features as the 7-day programmable thermostat and
includes locking coverplate with tamper proof screws, flush
to wall mount, holiday/vacation programming, set point
limiting, dual point with adjustable deadband, O or B terminal, and optional wall or duct-mounted remote sensor.
Programmable 5-day thermostat — Offers 2-stage heat,
2-stage cool, auto changeover, 5-minute built-in compressor protection, locking cover included, temperature display
in degrees F or C, keypad lockout, backlit display, 5-1-1
programming, O or B terminal, dual set point with adjustable deadband, configurable display, self-prompting program, 4 settings per day.
Non-programmable thermostat — Offers 2 heat stages,
2 cool stages, auto changeover, 5-minute built in compressor protection, locking cover included, temperature display
in degrees F or C, keypad lockout, large display, backlit
display, O or B terminal, dual set point with adjustable
deadband, backplate with terminals.
Loop controller with six stages (2 stages for heating and
4 stages for heat rejection):
• Loop temperature alarms
• Two pump single loop flow monitoring with the ability
to manually select the lead pump
• One common alarm signal and indicating light and one
audible alarm
• Loop water temperature sensor test circuit
• Functional test simulation from operator keypad
• Real timeclock, industrial noise ratings
• Loop water temperature control switch.
• Loop controller with six stages (2 stages for heating and
4 stages for cooling)
Filter rack (2 in.) is available in place of the standard
1-in. return air filter to enhance the filtration system of the
water source heat pump. The 2-in. filter rack does not
include filters.
Fire-rated hoses are 2 ft long and have a fixed MPT on
one end and a swivel with an adapter on the other end.
Hose kits have both a supply and return hose and can be
either stainless steel or galvanized. Five sizes are available
(1/2, 3/4, 1, 11/4, 11/2 in.).
Ball valves (brass body) used for shutoff and balancing
water flow. Available with memory, memory stop, and
pressure temperature ports. UL-listed brass body, ball and
stem type with Teflon seats and seals. Five sizes are available (1/2, 3/4, 1, 11/4, 11/2 in.).
Carrier’s line of Aquazone™ thermostats are both
attractive and multi-functional, accommodating standalone water source heat pump installations.
5
Options and accessories (cont)
Y strainers (bronze body) are “Y” type strainers with a
brass cap. Maximum operating pressure rating of
450 psi. Strainer screen made of stainless steel. Available
with blow down valves. Five sizes are available (1/2, 3/4, 1,
11/4, 11/2 in.).
Solenoid valves (brass body) offer 3.5 watt coil,
24 volt, 50/60 Hz, 740 amps inrush, .312 amps holding.
Slow operation for quiet system application. Five sizes are
available (1/2, 3/4, 1, 11/4, 11/2 in.).
Hose kit assemblies provide all the necessary components to hook up a water-side system. Supply hose includes
a ported ball valve with pressure temperature (P/T) plug
ports, flexible stainless steel hose with swivel and nipple.
Return hose includes a ball valve, preset automatic balancing valve (gpm) with two P/T ports, flexible stainless steel
hose with a swivel and nipple, balancing valve, and lowpressure drop water control valve.
Remote sensors are available for Aquazone™ flush
mount thermostats. Available for wall (wired and wireless)
or duct mounted applications.
PremierLink™ accessories provide a fully integrated
WSHP DDC system. Accessories include supply air temperature sensors (with override and/or setpoint adjustment), communicating room sensors, CO2 sensors (for use
in demand control ventilation), and linkage thermostats (to
control multiple units from one thermostat).
CARRIER AQUAZONE THERMOSTATS
Carrier
®
Pm
COOL
AUTO
HEAT
7-DAY PROGRAMMABLE/LIGHT-ACTIVATED
PROGRAMMABLE
7-DAY PROGRAMMABLE FLUSH MOUNT
R
COOL
AUTO
HEAT
5-DAY PROGRAMMABLE/NON-PROGRAMMABLE
6
PREMIERLINK™ COMMUNICATING CONTROL
7
Physical data
PHYSICAL DATA — AQUAZONE™ 50RHC,RVC018-060 UNITS
UNIT 50RHC,RVC
Compressor (1 each)
Factory Refrigerant Charge
Vertical (oz)
Factory Refrigerant Charge
Horizontal (oz)
PSC FAN MOTOR & BLOWER
Fan Motor Type/Speeds
Fan Motor (hp)
Blower Wheel Size (Dia x W)
WATER CONNECTION SIZE
FPT — All Other
HORIZONTAL
Air Coil
Dimensions (H x W)
Total Face Area (ft2)
Tube Size (in.)
Fin Spacing (fpi)
Number of Rows
Filter Standard — 1-in. Throwaway
(Qty — Size)
VERTICAL
Air Coil
Dimensions (H x W)
Total Face Area (ft2)
Tube Size (in.)
Fin Spacing (fpi)
Number of Rows
Filter Standard — 1-in. Throwaway
(Qty — Size)
Weight
Operating (lbs)
Packaged (lbs)
018
Recip
024
Recip
030
Recip
036
Recip
041
Recip
042
Recip
048
Recip
060
Scroll
26
38
37
42
50
51
66
74
25
38
37
41
50
51
66
74
PSC/3
1/
6
8x7
PSC/3
1/
4
9x7
PSC/3
3/
4
9x7
PSC/3
1/
2
9x8
PSC/3
3/
4
9x8
PSC/3
3/
4
9x8
PSC/3
3/
4
10 x 10
PSC/3
1
11 x 10
1/
2
3/
4
3/
4
3/
4
3/
4
3/
4
1
1
16 x 22
2.44
3/
8
12
2
16 x 22
2.44
3/
8
12
3
16 x 22
2.44
3/
8
12
3
—
—
—
—
—
1 — 16 x 25
1 — 16 x 25
1 — 16 x 25
20 x 25
3.47
3/
8
14
2
1 — 20 x 28 or
2 — 20 x 14
20 x 17.25
2.4
3/
8
12
2
20 x 17.25
2.4
3/
8
12
3
20 x 17.25
2.4
3/
8
12
3
24 x 21.75
3.62
3/
8
14
2
20 x 17.25
2.4
3/
8
11
4
24 x 21.75
3.62
3/
8
12
3
1 — 20 x 20
1 — 20 x 20
1 — 20 x 20
1 — 24 x 24
1 — 20 x 20
1 — 24 x 24
181
186
189
194
197
202
203
209
207
212
218
224
LEGEND
PSC — Permanent Split Capacitor
NOTES:
1. All units have grommet compressor mountings, and 1/2-in. and 3/4-in. electrical knockouts.
2. Check serial plate for refrigerant type (R-22 or R-407C).
8
—
20 x 25
20 x 35
20 x 35
3.47
4.86
4.86
3/
3/
3/
8
8
8
12
12
12
3
3
3
1 — 20 x 28 or 1 — 20 x 24 & 1 — 20 x 24 &
2 — 20 x 14
1 — 20 x 14 1 — 20 x 14
24 x 28.25
24 x 28.25
4.71
4.71
3/
3/
8
8
12
12
3
3
1 — 14 x 24 & 1 — 14 x 24 &
1 — 18 x 24 1 — 18 x 24
263
270
278
285
ARI/ISO capacity ratings
50RHC,RVC
LIQUID
FLOW
(Gpm)
AIRFLOW
(Cfm)
018
024
030
036
041
042
048
060
4.5
6.0
7.5
9.5
10.5
11.0
12.0
15.0
600
800
1000
1200
1325
1350
1600
2000
COP —
EER —
TC
—
WATER LOOP HEAT PUMP
Cooling 86 F
Heating 68 F
TC
EER
TC
Btuh
Btuh/W
Btuh COP
18,200
12.3
22,000 4.2
23,800
13.0
27,800 4.6
28,000
12.2
33,500 4.4
35,000
12.0
45,500 4.2
37,700
12.0
47,500 4.2
41,000
12.0
52,600 4.2
47,100
12.2
58,200 4.4
58,000
12.0
76,800 4.2
GROUND WATER HEAT PUMP
Cooling 59 F
Heating 50 F
TC
EER
TC
Btuh Btuh/W Btuh COP
GROUND LOOP HEAT PUMP
Cooling 77 F
Heating 32 F
TC
EER
TC
Btuh
Btuh/W
Btuh COP
Not Rated
Not Rated
LEGEND
Coefficient Performance
Energy Efficiency Ratio
Total Capacity
NOTES:
1. A water-to-air heat pump using water or brine circulating in a common piping
loop functioning as a heat source/heat sink.
2. The temperature of the water or brine loop is usually mechanically controlled
within a temperature range of 60 F to 90 F.
3. Certified in accordance with the ARI/ISO Standard 13256-1 Certification Program, which replaces ARI Standard-320.
ARI/ISO capacity notes
1. Cooling capacities based upon 80.6 F DB (dry bulb),
66.2 F WB (wet bulb) entering-air temperature.
2. Heating capacities based upon 68 F DB, 59 F WB
entering-air temperature.
3. All ratings based upon 208 volt operation.
9
Dimensions
HORIZONTAL DIMENSIONAL DATA
50RHC018-060 UNITS
OVERALL CABINET
50RHC
UNIT
A
B
C
Width Depth Height
WATER
CONNECTIONS
1 — In
D
018-030 in.
cm.
036,042 in.
cm.
in.
048
cm.
in.
060
cm.
20.1
51.1
20.1
51.1
24.1
61.2
24.1
61.2
43.1
109.5
47.1
119.6
54.1
137.4
54.1
137.4
17.1
43.4
21.1
53.6
21.1
53.6
21.1
53.6
E
2 — Out
F
15.3 2.4 1.9
38.9 6.1 4.9
18.8 2.2 4.7
47.6 5.5 11.9
19.4 5.9 4.3
49.2 14.9 11.0
19.4 5.9 4.3
49.2 14.9 11.0
G
2.1
5.3
1.2
3.0
2.3
5.8
2.3
5.8
ELECTRICAL KNOCKOUTS
H
J
K
1/ -in.
2
1/ -in.
2
3/ -in.
4
Cond
Low
Voltage
12.1
30.8
16.1
41.0
16.1
41.0
16.1
41.0
Cond
Low
Voltage
9.1
23.2
13.1
33.3
13.1
33.3
13.1
33.3
Cond
Power
Supply
6.1
15.6
10.1
25.7
10.1
25.7
10.1
25.7
NOTES:
1. Condensate is 3/4-in. FPT copper.
2. Horizontal unit shipped with filter bracket only. This bracket should be removed for return duct
connection.
3. Hanger kit is factory installed.
4. Verify high static option discharge connection dimensions with Carrier.
10
DISCHARGE CONNECTIONS
duct flange (±
± 0.10 in.)
L
2.6
6.6
2.5
6.3
3.7
9.5
1.7
4.4
M
N
Supply Supply
Height Depth
13.3
33.8
16.1
40.9
16.1
41.0
18.1
46.0
9.9
25.1
11.0
27.9
13.7
34.8
13.7
34.8
Code
S
E
Z
B
O
P
4.1
10.5
3.0
7.7
4.1
10.3
4.1
10.3
1.3
3.3
2.5
6.4
1.3
3.2
1.3
3.2
RETURN CONNECTION
using return air opening
Q
R
Return Return
Depth Height
23.0
58.4
25.9
65.8
35.9
91.2
35.9
91.2
15.0
38.1
19.0
48.3
19.0
48.3
19.0
48.3
S
T
1.1
2.8
1.1
2.8
1.1
2.8
1.1
2.8
1.0
2.5
1.0
2.5
1.0
2.5
1.0
2.5
AIRFLOW CONFIGURATION
Return
Discharge
Left
Right
Left
Back
Right
Left
Right
Back
VERTICAL DIMENSIONAL DATA
50RVC018-060 UNITS
OVERALL CABINET
50RVC
UNIT
A
B
C
Width Depth Height
WATER CONNECTIONS
1
2
D
E
In
018-030 in.
cm.
036 & in.
042
cm.
in.
041
cm.
048-060 in.
cm.
21.5
54.6
21.5
54.6
21.5
54.6
24.0
61.0
21.5
54.6
26.0
66.0
21.5
54.6
32.5
82.6
39.0
99.1
44.0
111.8
39.0
99.1
46.0
116.8
1.8
4.5
2.0
5.1
1.7
4.4
1.8
4.5
3.8
9.7
3.7
9.4
3.6
9.1
5.9
14.9
F
3
G
Out
15.2 3.6
38.6 9.1
16.2 2.6
41.1 6.6
16.4 2.6
41.7 6.6
16.7 2.3
42.4 5.8
H
I
Condensate
8.1
2.3
20.6
5.8
10.4
2.3
26.4
5.8
8.1
2.3
20.6
5.8
10.1
2.3
25.7
5.8
Water
FPT
Size
4″
1.9
4″
1.9
3/ ″
4
1.9
1″
2.5
3/
3/
ELECTRICAL
KNOCKOUTS
J
K
L
1/2-in.
1/2-in.
3/4-in.
cond
cond
cond
Low
Voltage
Low
Voltage
Power
Supply
4.1
10.5
4.1
10.5
4.1
10.5
4.1
10.5
7.1
18.1
7.1
18.1
7.1
18.1
7.1
18.1
10.1
25.7
10.1
25.7
10.1
25.7
10.1
25.7
DISCHARGE CONNECTION
±0.10 in.)
duct flange installed (±
M
N
6.4 3.8
16.1 9.5
6.4 3.8
16.1 9.5
6.4 3.8
16.1 9.5
6.9 7.3
17.4 18.4
RETURN CONNECTION
using return air opening
O
Supply
Width
P
Supply
Depth
Q
R
14.0
35.6
14.0
35.6
14.0
35.6
16.0
40.6
14.0
35.6
14.0
35.6
14.0
35.6
18.0
45.7
5.3
13.6
5.1
13.1
5.3
13.6
5.1
13.1
2.3
5.8
2.3
5.8
2.3
5.8
2.3
5.8
S
T
Return Return
Depth Height
18.3
46.5
22.8
57.9
18.3
46.5
29.3
74.4
20.2
51.3
24.2
61.4
20.2
51.3
24.2
61.4
U
0.7
1.9
0.7
1.9
0.7
1.9
0.7
1.9
NOTES:
1. Condensate is 3/4 in. (19.1 mm) FPT.
2. Filter bracket extending from unit 2.5 in. (6.4 cm). This bracket should be removed when connecting return duct.
3. Discharge flange field installed.
Code
L
R
AIRFLOW CONFIGURATION
Return
Discharge
Left
Top
Right
Top
11
Selection procedure (with 50RHC024 example)
I Determine the actual cooling and heating
loads at the desired dry bulb and wet bulb
conditions.
Assume cooling load at desired dry bulb 80 F and
wet bulb 65 F conditions are as follows:
Given:
Total Cooling (TC). . . . . . . . . . . . . . .22,100 Btuh
Sensible Cooling (SC) . . . . . . . . . . . .16,500 Btuh
Entering-Air Temperature db . . . . . . . . . . . . 80 F
Entering-Air Temperature wb . . . . . . . . . . . . .65 F
II Determine the following design parameters.
Entering water temperature, water flow rate (GPM),
airflow (CFM), water flow pressure drop and design
wet and dry bulb temperatures. Airflow CFM should
be between 300 and 450 CFM per ton. Unit water
pressure drop should be kept as close as possible to
each other to make water balancing easier. Enter the
50RHC024 Performance Data tables and find the
proper indicated water flow and water temperature.
For example:
Entering Water Temp . . . . . . . . . . . . . . . . . 90 F
Water Flow (Based upon
12 F rise in temp) . . . . . . . . . . . . . . . . . 4.5 GPM
Airflow Cfm . . . . . . . . . . . . . . . . . . . . . 700 Cfm
III Select a unit based on total cooling and total
sensible cooling conditions. Unit selected
should be closest to but not larger than the
actual cooling load.
Enter tables at the design water flow and water
temperature. Read the total and sensible cooling
capacities.
NOTE: Interpolation is permissible, extrapolation is
not.
For example:
Enter the 50RHC024 Performance Table at design
water flow and water temperature. Read Total
Cooling, Sensible Cooling and Heat of Rejection
capacities:
Total Cooling . . . . . . . . . . . . . . . . . .23,500 Btuh
Sensible Cooling . . . . . . . . . . . . . . . 17,800 Btuh
Heat of Rejection . . . . . . . . . . . . . . .30,300 Btuh
Read the Heat Capacity. If the Heat Capacity
exceeds the design criteria, it is acceptable.
NOTE: It is quite normal for water source heat
pumps to be selected on cooling capacity only since
the heating output is usually greater than the cooling
capacity.
12
IV Determine the correction factors associated
with the variable factors of dry bulb and wet
bulb using the Corrections Factor tables
found in this book.
Using the following formulas to determine the correction factors of dry bulb and wet bulb:
a) Corrected Total Cooling = tabulated total cooling
x wet bulb correction x airflow correction.
b) Corrected Sensible Cooling = tabulated sensible
cooling x wet/dry bulb correction x airflow
correction
V Determine entering air and airflow correction
using the Corrections Factor tables found in
this book.
The nominal airflow for 50RHC024 is 800 cfm.
The design parameter is 700 cfm.
700/800 = 88% of nominal airflow
Use the 88% row in the Airflow Correction table.
The Entering Air Temperature wb is 65 F. Use the
65 F row in the Entering Air Correction table.
Using the following formulas to determine the correction factors of entering air and airflow correction:
Table
Ent Air
Airflow
Corrected
Corrected
Total Cooling
= 23,500 x 0.964 x 0.987 = 22,360
Corrected
Sensible Cooling = 17,800 x 1.076 x 0.949 = 18,176
Corrected
Heat of Rejection = 30,300 x 0.971 x 0.985 = 28,980
Compare the corrected capacities to the load
requirements established in Step I. If the capacities
are within 10% of the load requirements, the equipment is acceptable. It is better to undersize than
oversize as undersizing improves humidity control,
reduces sound levels and extends the life of the
equipment.
VI Water temperature rise calculation and
assessment.
Calculate the water temperature rise and assess the
selection using the following calculation:
Actual Temperature = Correction of Heat Rejection
Rise
GPM x 500
For example, using the Corrected Heat of Rejection
from the last step:
28,980
Actual Temperature
=
=
Rise
4.5 x 500
12.9 F
If the units selected are not within 10% of the load
calculations, review what effect changing the GPM,
water temperature and/or airflow will have on the
corrected capacities. If the desired capacity cannot
be achieved, select the next larger or smaller unit
and repeat Steps I through VI.
VII ARI/ISO/ASHRAE 13256-1 Conversion
Performance standard ARI/ISO/ASHRAE 13256-1
became effective on January 1, 2000 and replaced
the existing ARI Standards 320 Water-Loop Heat
Pumps (WLHP), 325 Ground-Water Heat Pumps
(GWHP), and 330 Ground-Loop Heat Pumps
(GLHP).
The ARI/ISO Standard incorporates a consistent
rating methodology for including fan and pump
energy for calculating cooling capacity, heating
capacity, and energy efficiency ratios (EER). This
simplifies the use of rating data for heat pump performance modeling in seasonal energy analysis calculations, and allows for direct rating comparisons
across applications.
a) ISO Capacity and Efficiency Equations
The following equations are used to calculate and
correct cooling capacity, heating capacity, and
respective EER:
ISO Cooling Capacity = (Cooling Capacity in
Btuh) + (Fan Power Correction in Watts x 3.412)
ISO Cooling EER = (ISO Cooling Capacity in
Btuh/3.412)/(Power Input in watts – fan power
correction in watts + pump power correction in
watts) = Watts/Watts
NOTE: Do not divide ISO Cooling Capacity by
3.412 to obtain Btuh/Watts.
ISO Heating Capacity = (Heating Capacity in
Btuh) – (Fan Power Correction in Watts x 3.412)
ISO Heating EER = (ISO Heating Capacity in
Btuh/3.412)/(Power Input in watts – fan power
correction in watts + pump power correction in
watts) = Watts/Watts
NOTE: Do not divide ISO Heating Capacity by
3.412 to obtain Btuh/Watts.
Refer to English to SI conversion table in this
book.
b) Identify the design conditions corrected for air and
water conditions.
Airflow Cfm = 700 Cfm
Water Flow
(Based upon 12 F rise in temp) = 4.5 GPM
External Static Pressure = 0.4 in. wg
Water Pressure Drop = 8.1 ft of head
Power input = 2,010 watts
Cooling Capacity = 22,360 Btuh
c) Perform Fan Power Correction Adjustment
Use the following formula to calculate Fan Power
Correction:
Fan Power
Correction = (Cfm x 0.472) x (External Static
Pressure x 249)/300 = Watts
= (700 x 0.472) x (0.4 x 249)/300
= 110 Watts
d) Perform Pump Power Correction Adjustment
Use the following formula to calculate Pump
Power Correction:
Pump Power
Correction = (GPM x 0.0631) x (Pressure Drop
x 2,990)/300
= Watts
= (4.5 x 0.0631) x
(8.1 x 2,990)/300
= 23 Watts
e) Perform capacity and EER calculations
Use the following formula to calculate capacity
and EER:
ISO Cooling
Capacity
= (Cooling Capacity) + (Fan Power
Correction x 3.412)
= 22,360 + (110 x 3.412)
= 22,735 Btuh
f) Perform Corrections by using the ISO Equations
ISO EER = (ISO Cooling Capacity/3.412)/
(Power Input – Fan Power Correction + Pump Power Correction)
= Watts/Watts
NOTE: Do not divide ISO Cooling Capacity by
3.412 to obtain Btuh/Watts.
= (22,735/3.412)/(2,010 – 110 + 23)
= 3.47 Watts/Watt
= 11.82 Btuh/Watt
13
Performance data
50RHC,RVC018 — 600 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
2.3
3.4
4.5
2.3
3.4
4.5
2.3
3.4
4.5
2.3
3.4
4.5
2.3
3.4
4.5
2.3
3.4
4.5
PRESSURE DROP
PSI
Ft Wg
2.1
4.8
3.0
7.0
4.3
9.8
2.0
4.6
2.9
6.7
4.1
9.5
1.9
4.5
2.8
6.5
4.0
9.2
1.9
4.4
2.8
6.4
3.9
9.1
1.9
4.4
2.7
6.3
3.9
9.0
1.9
4.3
2.7
6.3
3.8
8.9
TC
20.2
20.9
21.3
19.3
20.0
20.3
18.3
19.1
19.4
17.6
18.6
18.9
16.7
17.9
18.3
15.7
17.1
17.6
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
14
COOLING
TSC
kW
14.8
1.37
15.1
1.28
15.2
1.24
14.4
1.48
14.7
1.39
14.9
1.36
13.8
1.58
14.3
1.50
14.4
1.47
13.4
1.63
14.0
1.56
14.2
1.52
12.9
1.67
13.6
1.61
13.8
1.58
12.3
1.72
13.1
1.65
13.4
1.63
THR
24.8
25.3
25.6
24.4
24.7
24.9
23.7
24.2
24.4
23.1
23.9
24.1
22.4
23.4
23.7
21.5
22.7
23.2
TC
19.9
20.7
21.1
21.6
22.4
22.7
23.1
23.8
24.1
23.7
24.4
24.7
24.3
24.9
25.3
HEATING
kW
1.54
1.57
1.58
1.60
1.63
1.64
1.65
1.68
1.69
1.68
1.71
1.72
1.70
1.73
1.74
THA
14.6
15.4
15.7
16.1
16.8
17.1
17.4
18.1
18.3
18.0
18.6
18.8
18.5
19.0
19.4
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
50RHC,RVC024 — 800 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
3.0
4.5
6.0
PRESSURE DROP
PSI
Ft Wg
2.0
4.6
3.8
8.9
6.4
14.9
1.9
4.4
3.7
8.5
6.2
14.3
1.9
4.3
3.6
8.3
6.0
13.9
1.8
4.2
3.6
8.2
6.0
13.8
1.8
4.2
3.5
8.1
5.9
13.6
1.8
4.1
3.5
8.0
5.8
13.4
TC
25.5
25.8
26.0
24.9
25.3
25.5
23.9
24.6
24.9
23.2
24.1
24.5
22.4
23.5
23.9
21.5
22.7
23.2
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
COOLING
TSC
kW
19.1
1.71
19.2
1.62
19.3
1.58
18.7
1.85
19.0
1.76
19.1
1.71
18.0
1.97
18.5
1.89
18.7
1.84
17.6
2.03
18.2
1.95
18.4
1.91
17.2
2.08
17.8
2.01
18.1
1.97
16.6
2.13
17.3
2.07
17.6
2.03
THR
31.3
31.4
31.4
31.2
31.3
31.3
30.6
31.0
31.2
30.2
30.8
31.0
29.5
30.3
30.6
28.7
29.8
30.2
TC
26.3
27.4
28.0
28.6
29.7
30.1
30.5
31.3
31.6
31.2
31.9
32.1
31.8
32.3
32.4
HEATING
kW
1.74
1.78
1.80
1.83
1.87
1.89
1.90
1.94
1.95
1.93
1.97
1.98
1.96
1.99
2.00
THA
20.3
21.4
21.9
22.4
23.3
23.7
24.0
24.7
25.0
24.6
25.1
25.3
25.1
25.5
25.6
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
15
Performance data (cont)
50RHC,RVC030 — 1000 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
3.8
5.6
7.5
3.8
5.6
7.5
3.8
5.6
7.5
3.8
5.6
7.5
3.8
5.6
7.5
3.8
5.6
7.5
PRESSURE DROP
PSI
Ft Wg
1.6
3.6
2.8
6.5
4.4
10.1
1.5
3.5
2.7
6.2
4.2
9.7
1.5
3.4
2.6
6.1
4.1
9.4
1.4
3.3
2.6
6.0
4.0
9.3
1.4
3.3
2.6
5.9
4.0
9.2
1.4
3.2
2.5
5.8
3.9
9.1
TC
28.8
29.2
29.4
28.1
28.7
28.9
26.9
27.7
28.1
26.2
27.1
27.5
25.4
26.4
26.8
24.5
25.6
26.1
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
16
COOLING
TSC
kW
21.3
2.00
21.5
1.91
21.7
1.87
21.0
2.17
21.2
2.06
21.3
2.01
20.4
2.34
20.8
2.23
20.9
2.18
20.1
2.43
20.5
2.32
20.7
2.27
19.7
2.50
20.1
2.41
20.4
2.35
19.2
2.57
19.7
2.49
20.0
2.44
THR
35.7
35.7
35.7
35.5
35.7
35.7
34.9
35.4
35.5
34.5
35.0
35.3
33.9
34.6
34.9
33.3
34.1
34.4
TC
31.2
32.1
32.6
33.3
34.1
34.6
35.0
35.8
36.2
35.8
36.6
36.9
36.6
37.2
37.5
HEATING
kW
2.22
2.24
2.25
2.26
2.28
2.29
2.30
2.33
2.34
2.33
2.36
2.37
2.36
2.38
2.40
THA
23.6
24.5
24.9
25.5
26.3
26.7
27.2
27.9
28.2
27.9
28.5
28.8
28.5
29.1
29.3
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
50RHC,RVC036 — 1200 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
4.5
6.8
9.0
4.5
6.8
9.0
4.5
6.8
9.0
4.5
6.8
9.0
4.5
6.8
9.0
4.5
6.8
9.0
PRESSURE DROP
PSI
Ft Wg
1.8
4.1
3.2
7.4
5.1
11.8
1.7
3.9
3.1
7.2
4.9
11.3
1.7
3.8
3.0
7.0
4.8
11.0
1.6
3.8
3.0
6.9
4.7
10.9
1.6
3.7
2.9
6.8
4.6
10.7
1.6
3.7
2.9
6.7
4.6
10.6
TC
38.2
39.0
39.3
36.6
37.8
38.3
34.4
35.9
36.7
33.1
34.8
35.6
31.6
33.5
34.4
30.1
32.0
33.0
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
COOLING
TSC
kW
26.8
2.74
26.9
2.58
27.1
2.50
26.3
2.95
26.7
2.80
26.8
2.72
25.6
3.15
26.2
3.01
26.4
2.94
25.0
3.24
25.8
3.11
26.0
3.05
24.3
3.34
25.2
3.21
25.6
3.15
23.5
3.43
24.6
3.31
25.0
3.25
THR
47.6
47.8
47.8
46.6
47.3
47.6
45.1
46.2
46.7
44.1
45.4
46.0
43.0
44.5
45.1
41.8
43.3
44.1
TC
39.0
41.4
42.6
43.9
46.2
47.2
47.9
49.7
50.5
49.5
50.9
51.5
50.8
51.8
52.1
HEATING
kW
2.94
3.03
3.07
3.12
3.21
3.25
3.28
3.36
3.40
3.35
3.42
3.45
3.41
3.47
3.50
THA
28.9
31.0
32.1
33.3
35.2
36.1
36.7
38.2
38.9
38.1
39.3
39.7
39.1
39.9
40.2
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
17
Performance data (cont)
50RVC041 — 1325 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
5.3
7.9
10.5
5.3
7.9
10.5
5.3
7.9
10.5
5.3
7.9
10.5
5.3
7.9
10.5
5.3
7.9
10.5
PRESSURE DROP
PSI
Ft Wg
1.0
2.2
2.2
5.1
4.0
9.3
0.9
2.1
2.1
5.0
3.9
8.9
0.9
2.1
2.1
4.8
3.8
8.7
0.9
2.0
2.1
4.8
3.7
8.6
0.9
2.0
2.0
4.7
3.7
8.5
0.9
2.0
2.0
4.6
3.6
8.4
TC
40.0
40.5
40.9
39.1
39.7
39.9
37.9
38.8
39.1
37.0
38.1
38.5
35.9
37.3
37.8
34.4
36.2
36.9
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
18
COOLING
TSC
kW
29.0
2.78
29.0
2.67
29.0
2.62
29.0
3.00
29.0
2.86
29.0
2.79
28.4
3.24
28.9
3.09
29.0
3.01
27.8
3.36
28.5
3.21
28.8
3.13
27.1
3.48
27.9
3.33
28.3
3.26
26.3
3.58
27.3
3.45
27.7
3.38
THR
49.4
49.6
49.8
49.4
49.4
49.4
49.0
49.3
49.4
48.5
49.1
49.2
47.7
48.6
48.9
46.7
47.9
48.4
TC
43.1
44.7
45.5
46.6
48.1
48.8
49.6
50.8
51.4
50.9
52.0
52.6
52.0
53.0
53.5
HEATING
kW
3.21
3.28
3.32
3.37
3.43
3.46
3.50
3.56
3.58
3.56
3.61
3.64
3.61
3.66
3.68
THA
32.2
33.5
34.1
35.1
36.3
36.9
37.6
38.7
39.2
38.7
39.7
40.1
39.7
40.5
40.9
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
50RHC,RVC042 — 1350 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
5.3
8.0
11.0
5.3
8.0
11.0
5.3
8.0
11.0
5.3
8.0
11.0
5.3
8.0
11.0
5.3
8.0
11.0
PRESSURE DROP
PSI
Ft Wg
1.0
2.4
2.7
6.2
5.5
12.7
1.0
2.3
2.6
6.0
5.3
12.2
1.0
2.2
2.5
5.8
5.2
11.9
1.0
2.2
2.5
5.8
5.1
11.8
0.9
2.2
2.5
5.7
5.0
11.6
0.9
2.2
2.4
5.6
5.0
11.5
TC
43.2
43.8
44.2
42.3
42.9
43.2
40.8
41.9
42.3
39.6
41.1
41.6
38.2
40.0
40.8
36.4
38.7
39.6
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
COOLING
TSC
kW
31.0
3.03
31.0
2.89
31.0
2.84
30.8
3.29
30.9
3.11
31.0
3.02
30.2
3.58
30.7
3.38
30.8
3.28
29.7
3.72
30.4
3.53
30.6
3.43
29.0
3.85
29.9
3.67
30.2
3.58
28.0
3.96
29.2
3.81
29.7
3.72
THR
53.5
53.6
53.9
53.5
53.5
53.5
53.0
53.4
53.5
52.3
53.1
53.3
51.3
52.6
53.0
49.9
51.7
52.3
TC
46.8
48.9
50.0
51.2
53.3
54.4
55.1
57.0
58.0
56.9
58.6
59.5
58.4
60.1
60.8
HEATING
kW
3.47
3.58
3.63
3.69
3.79
3.83
3.87
3.95
3.98
3.94
4.01
4.04
4.00
4.06
4.08
THA
34.9
36.7
37.6
38.7
40.4
41.3
42.0
43.6
44.4
43.4
45.0
45.7
44.8
46.2
46.9
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
19
Performance data (cont)
50RHC,RVC048 — 1600 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
6.0
9.0
12.0
6.0
9.0
12.0
6.0
9.0
12.0
6.0
9.0
12.0
6.0
9.0
12.0
6.0
9.0
12.0
PRESSURE DROP
PSI
Ft Wg
1.2
2.9
2.9
6.7
5.3
12.3
1.2
2.8
2.8
6.5
5.1
11.8
1.2
2.7
2.7
6.3
5.0
11.5
1.2
2.7
2.7
6.2
4.9
11.3
1.1
2.6
2.7
6.1
4.8
11.2
1.1
2.6
2.6
6.1
4.8
11.0
TC
50.2
50.9
51.2
48.8
49.8
50.2
46.6
48.2
48.8
45.2
47.1
47.9
43.5
45.7
46.7
41.6
44.1
45.2
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
20
COOLING
TSC
kW
35.8
3.67
36.1
3.48
36.3
3.39
35.4
3.96
35.6
3.76
35.8
3.66
34.8
4.25
35.3
4.05
35.4
3.95
34.3
4.38
34.9
4.20
35.2
4.10
33.5
4.51
34.5
4.34
34.8
4.24
32.6
4.62
33.8
4.47
34.3
4.38
THR
62.7
62.8
62.8
62.3
62.6
62.7
61.1
62.0
62.3
60.2
61.4
61.8
58.9
60.5
61.1
57.4
59.3
60.2
TC
52.1
54.6
56.0
57.4
59.9
61.1
62.0
64.2
65.2
64.0
66.0
66.9
65.7
67.6
68.4
HEATING
kW
3.70
3.79
3.84
3.89
3.98
4.02
4.05
4.13
4.16
4.12
4.18
4.21
4.18
4.23
4.25
THA
39.5
41.7
42.9
44.1
46.3
47.4
48.2
50.1
51.0
49.9
51.7
52.6
51.5
53.1
53.9
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
50RHC,RVC060 — 2000 CFM NOMINAL AIRFLOW
EWT (F)
60
70*
80
85*
90
95
DB
EWT
GPM
TC
THA
THR
TSC
WB
GPM
7.5
11.3
15.0
7.5
11.3
15.0
7.5
11.3
15.0
7.5
11.3
15.0
7.5
11.3
15.0
7.5
11.3
15.0
PRESSURE DROP
PSI
Ft Wg
4.4
10.1
7.6
17.5
11.5
26.7
4.2
9.7
7.3
16.9
11.1
25.6
4.1
9.4
7.1
16.4
10.8
25.0
4.0
9.3
7.0
16.2
10.7
24.6
4.0
9.2
6.9
16.0
10.5
24.3
3.9
9.1
6.8
15.8
10.4
24.0
TC
60.5
61.2
61.6
59.0
60.1
60.5
56.8
58.3
59.0
55.4
57.2
57.9
53.9
55.8
56.7
52.1
54.3
55.3
LEGEND
— Dry Bulb
— Entering Water Temperature (F)
— Gallons Per Minute
— Total Capacity (MBtuh)
— Total Heat of Absorption (MBtuh)
— Total Heat of Rejection (MBtuh)
— Total Sensible Capacity (MBtuh)
— Wet Bulb
COOLING
TSC
kW
43.1
4.36
43.2
4.17
43.3
4.08
42.9
4.68
43.1
4.46
43.2
4.36
42.4
5.04
42.8
4.80
42.9
4.68
42.0
5.23
42.5
4.98
42.7
4.86
41.4
5.44
42.1
5.17
42.4
5.04
40.5
5.66
41.6
5.38
42.0
5.24
THR
75.4
75.5
75.5
74.9
75.3
75.4
74.0
74.7
74.9
73.3
74.1
74.5
72.4
73.5
73.9
71.4
72.7
73.2
TC
63.0
67.4
69.8
72.6
77.0
79.2
80.6
84.4
86.2
83.9
87.3
88.7
86.8
89.5
90.6
HEATING
kW
5.02
5.17
5.25
5.34
5.49
5.56
5.61
5.74
5.80
5.73
5.84
5.89
5.82
5.91
5.95
THA
45.9
49.8
51.9
54.4
58.2
60.2
61.5
64.8
66.4
64.4
67.4
68.7
66.9
69.4
70.3
Operation Not Recommended
NOTES:
1. Interpolation is permissible, extrapolation is not.
2. All entering air conditions are 80 F db (dry bulb) and 67 F wb (wet
bulb) in cooling and 70 F db in heating.
3. All performance data is based upon the lower voltage of dual voltage
rated units.
4. See Performance Correction tables for operating conditions other
than those listed above.
5. Data table does not reflect ISO pump or fan corrections.
6. Performance capacities shown in thousands of Btuh.
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
21
Performance data (cont)
AIRFLOW CORRECTION TABLE
AIRFLOW
CFM Per Ton
% of
of Clg
Nominal
300
75%
325
81%
350
88%
375
94%
400
100%
425
106%
450
113%
475
119%
500
125%
HEATING
COOLING
Htg Cap
Power
Heat of Ext
Total Cap
Sens Cap
kW
THR
0.966
0.976
0.985
0.993
1.000
1.006
1.011
1.014
1.017
1.051
1.037
1.023
1.012
1.000
0.991
0.982
0.975
0.968
0.939
0.956
0.973
0.987
1.000
1.010
1.020
1.027
1.033
0.970
0.979
0.987
0.994
1.000
1.005
1.009
1.011
1.013
0.899
0.924
0.949
0.975
1.000
1.026
1.051
1.077
1.102
0.953
0.966
0.979
0.990
1.000
1.008
1.016
1.022
1.027
0.967
0.976
0.985
0.993
1.000
1.005
1.010
1.013
1.016
LEGEND
Clg — Cooling
Htg — Heating
THR — Total Heat of Rejection (MBtuh)
NOTE: 400 cfm is nominal airflow.
ENTERING AIR CORRECTION TABLE
HEATING CORRECTIONS
Ent Air
DB (F)
Heating
Capacity
Power
45
50
55
60
65
68
70
75
80
1.044
1.042
1.037
1.028
1.016
1.007
1.000
0.980
0.957
0.803
0.847
0.888
0.927
0.965
0.986
1.000
1.033
1.065
Clg
DB
Htg
THR
WB
—
—
—
—
—
Heat of Ext
Ent Air
WB (F)
Total Clg
Cap
1.123
1.107
1.086
1.062
1.033
1.014
1.000
0.963
0.921
60
65
66.2
67
70
75
0.858
0.964
0.986
1.000
1.049
1.113
COOLING CORRECTIONS
Sens Clg Cap Multiplier - Entering DB (F)
70
75
80
80.6
85
90
95
0.812 1.062 1.217 1.229
*
*
*
0.622 0.876 1.076 1.098 1.240
*
*
0.577 0.822 1.032 1.055 1.214
*
*
0.547 0.785 1.000 1.024 1.192 1.362 1.508
—
0.630 0.864 0.891 1.086 1.236 1.399
—
—
0.580 0.609 0.814 1.027 1.218
LEGEND
Cooling
Dry Bulb
Heating
Total Heat of Rejection
Wet Bulb
*Sensible capacity equals total capacity.
NOTES:
1. ARI/ISO/ASHRAE 13256-1 uses entering air conditions of Cooling — 80.6° F db/66.2° F wb and Heating
— 68° F db/59° F wb.
2. Discontinued Standards ARI 320, 325, and 330 used entering air conditions of Cooling 80° F db/67° F wb
and Heating — 70° F db (bold print).
CONVERSION TABLE – ENGLISH TO SI
MEASUREMENT
Airflow
Water Flow
External Static Pressure
Water Pressure Drop
CONVERSION
Airflow (lps) = CFM x 0.472
Water flow (lps) = Gpm x 0.0631
ESP (Pascal) = ESP (in. wg) x 249
PD (Pascal) = PD (ft of head) x 2,990
LEGEND
ESP — External Static Pressure
PD — Pressure Drop
22
kW
THR
0.982
0.996
0.999
1.000
1.004
1.007
0.886
0.971
0.989
1.000
1.039
1.089
50RHC,RVC BLOWER PERFORMANCE
50RHC,RVC
RATED MIN
CFM
CFM
018
600
450
018
High Static
600
450
024
800
600
024
High Static
800
600
030
1000
750
030
High Static
1000
750
036
1200
900
036
High Static
1200
900
041
1325
950
042
1350
1050
042
High Static
1350
1050
048
1600
1200
048
High Static
1600
1200
060
2000
1500
060
High Static
2000
1500
FAN
SPEED 0.00
HI
MED
700
LO
620
HI
MED
750
LO
670
HI
MED 1010
LO
820
HI
MED
LO
HI
MED 1250
LO
1120
HI
MED
LO
1050
HI
1520
MED 1150
LO
1010
HI
MED 1360
LO
1030
HI
1380
MED 1230
LO
1040
HI
1640
MED 1490
LO
1140
HI
MED 1390
LO
HI
MED 1940
LO
1770
HI
MED 2050
LO
1850
HI
2240
MED 2050
LO
1850
HI
2400
MED 2160
LO
1930
EXTERNAL STATIC PRESSURE (in. wg)
0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90
760 740 720 710 700 680 650 600 550 460
690 680 670 660 650 630 620 600 560 520 430
610 600 590 580 570 560 540 520 490 460
790 780 770 760 750 730 710 690 650 530 430
740 720 710 700 690 670 670 660 650 630 600 490 390
660 640 630 620 610 600 590 580 580 570 530 420
1000 970 930 870 770 690
1000 990 980 960 940 920 900 880 860 830 770 700 600
810 800 790 780 770 760 750 730 720 700 650 600
1030 950 840 700
1040 1010 970 890 750 620
1030 1010 980 960 930 900 870 790 710
1160 1130 1100 1070 1030 950 840
1230 1200 1180 1150 1120 1090 1070 1040 1010 970 890 750
1100 1070 1050 1030 1010 980 960 930 900 870 790 710
1160 1040 920 800 750
1130 1080 1030 930 820 750
1040 1030 1010 990
980 960 940 910 880 840 750
1500 1480 1460 1430 1400 1370 1350 1320 1270 1210 1110 960 840
1150 1140 1140 1130 1130 1120 1110 1100 1070 1040 940
1010 1000 1000 990 990 980 980 970 950 930
1530 1500 1470 1400 1290 1170 960
1350 1340 1330 1320 1310 1300 1280 1260 1250 1230 1150 1070 910
1020 1010 1010 1000 1000 990 980 960 950 930
1370 1350 1330 1300 1260 1220 1170 1120 1080 1040 890
1220 1200 1190 1180 1150 1120 1080 1030 990 950
1030 1010 1000 990 970 950
1610 1580 1550 1520 1490 1450 1410 1370 1330 1290 1190 1100
1470 1440 1420 1390 1370 1340 1310 1270 1230 1190 1120 1010
1140 1130 1130 1120 1110 1100 1080 1060 1010
1550 1540 1520 1500 1470 1460 1450 1380 1240 1080
1380 1370 1360 1350 1340 1320 1310 1300 1280 1250 1180 1080
0.05
1980 1950 1910 1860 1800
1920 1900 1880 1860 1820 1770 1740 1710
1750 1730 1710 1690 1670 1650 1610 1570
2060
2050 2040 2020 1990 1970 1940 1920 1890
1850 1840 1830 1810 1800 1780 1760 1730
2240 2230 2220 2200 2160 2120 2090 2060
2050 2040 2020 1990 1970 1940 1920 1890
1850 1840 1830 1810 1800 1780 1760 1730
2400 2390 2380 2370 2360 2340 2320 2300
2160 2150 2150 2140 2110 2080 2060 2040
1930 1920 1920 1910 1900 1890 1890 1880
NOTES:
1. Gray areas denote ESP (external static pressure) where operation is not
recommended.
2. Units factory shipped on medium speed. Other speeds require field selection.
3. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v for
208-230 v units.
4. All units ARI/ISO/ASHRAE 13256-1 rated on high fan speed.
1740
1660
1510
2040
1860
1700
2040
1860
1700
2270
2030
1870
1680
1600
1450
2010
1830
1670
2010
1830
1670
2240
2020
1850
1490
1410
1330
1960
1780
1600
1960
1780
1600
2200
1980
1830
1.0
1.10
1.20
1.30
1280 1280
1000
1880
1710
1510
1880
1710
1510
2130
1930
1800
1790
1620
1380
1790
1620
1660 1510
1490 1320
1220
1660 1510
1490
2060 1980 1890 1790 1660 1500
1880 1490 1750 1660 1530
1750 1700 1620 1530
5. Only two speed fan (H & M) available on 575-v units.
6. For wet coil performance first calculate the face velocity of the air coil (Face
Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of 200 fpm
reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg, 400 fpm by
0.12 in. wg, and 500 fpm by 0.16 in. wg.
7. Airflow in cfm with dry coil and clean air filter.
23
Electrical data
50RHC,RVC ELECTRICAL DATA
50RHC,RVC
018
024
030
036
041
042
048
060
FLA
HACR
LRA
RLA
—
—
—
—
VOLTAGE
MIN/MAX
RLA
LRA
208/230-1
265-1
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
265-1
208/230-3
460-3
208/230-1
208/230-3
460-3
575-3
208/230-1
208/230-3
460-3
575-3
208/230-1
208/230-3
460-3
575-3
208/230-1
208/230-3
460-3
575-3
197/254
239/292
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
239/292
197/254
414/506
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
197/254
197/254
414/506
518/633
8.6
8.1
9.8
9.1
6.7
3.5
11.2
10.0
6.9
3.6
15.4
14.4
9.6
4.9
16.2
10.3
4.3
4.3
17.1
10.7
5.3
3.7
18.3
12.6
5.7
4.7
25.6
14.7
7.4
5.9
49.0
44.0
56.0
55.0
51.0
25.0
61.0
58.0
55.0
28.0
82.0
83.0
70.0
33.0
96.0
75.0
40.0
34.0
105.0
85.0
42.0
31.0
102.0
91.0
42.0
39.0
170.0
124.0
59.6
49.4
LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Locked Rotor Amps
Rated Load Amps
NOTES:
1. HACR circuit breaker in U.S.A. only.
2. All fuses Class RK-5.
24
COMPRESSOR
VOLTS-PHASE
60 Hz
FAN
MOTOR
FLA
1.00
0.86
1.50
1.30
1.50
0.76
3.00
2.70
3.00
1.70
1.80
2.00
1.80
1.24
3.00
3.00
1.70
1.40
3.00
3.00
1.70
1.50
3.40
3.40
1.80
1.40
4.30
4.30
2.50
1.90
TOTAL
UNIT
FLA
9.6
8.9
11.3
10.4
8.2
4.2
14.2
12.7
9.9
5.3
17.2
16.4
11.4
6.1
19.2
13.3
6.0
5.7
20.1
13.7
7.0
5.2
21.7
16.0
7.5
6.1
29.9
19.0
9.9
7.8
MIN
CIRCUIT
AMP
11.7
11.0
13.8
12.7
9.9
5.1
16.9
15.2
11.7
6.2
21.1
20.0
13.8
7.4
23.2
15.8
7.1
6.8
24.3
16.4
8.3
6.1
26.3
19.2
8.9
7.2
36.4
22.7
11.8
9.3
MAX
FUSE/HACR
20
15
20
20
15
15
25
25
15
15
35
30
20
15
35
25
15
15
40
25
15
15
40
30
15
15
60
35
15
15
Typical piping and wiring
TYPICAL INSTALLATION — 50RHC UNITS
Return Loop
3/8” threaded rods
(by others)
Supply Loop
Water In
Filter Access
Water Out
Return Air
(Ductwork
not shown)
Field-supplied transition to
minimize pressure loss
Thermostat
Wiring
Power Wiring
Field-supplied
stainless steel
braid hose
with integral
“ J” swivel
Supply Air
Balancing Valve (fieldinstalled and calibrated
accessory)
Low Pressure Drop Water
Control Valve (Optional)
(field-installed accessory)
Unit Power
Flexible
Insulated supply duct with Connection
at least one 90 deg elbow
Field-Supplied
to reduce air noise
Electric Heat
(field supplied)
(if applicable)
Water Out
Water In
Unit Power
Disconnect
Ball Valve with optional
integral P/T plug (typical for supply and
return piping)
Unit Hanger
3/8" Threaded
Rod (by others)
Vibration Isolator
(white-compressor end and
red-blower end)
size 042-060
Washer
(by others)
Double Hex Nuts
(by others)
Install screw as shown
(must be 1/2-in. long to
prevent damage)
Integral hanger supportpre-attached in factory
UNIT HANGER ISOLATION DETAIL
TYPICAL VERTICAL INSTALLATION — 50RVC UNITS
Supply Air
Flexible
Connection
Return
Air
Power
Thermostat
Wiring
Compressor
Access Panel
Building
Loop
Water
Out
Field-supplied
stainless steel
braid hose
with integral
“ J” swivel
NOTE: Ball valve with integral pressure temperature
plug recommended.
Water
In
Balancing Valve
(field-installed
and calibrated
accessory)
Low Pressure
Drop Water
Control Valve (Optional)
(field-installed
accessory)
Ball Valve with optional
integral P/T plug
(typical for supply and
return piping)
25
Typical wiring schematics
TYPICAL AQUAZONE™ COMPLETE C CONTROL WIRING
PM
Stg 1/Stg 2
See Note 9
Aquazone
Thermostat
LEGEND
AL
BM
BMC
BR
CAP
CC
CO
FP1
FP2
HP
JW1
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Blower Motor Capacitor
Blower Relay
Capacitor
Compressor Contactor
Sensor, Condensate Overflow
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper, Alarm
LOC
NEC
P1
PM
RVS
Trans
—
—
—
—
—
—
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 265 v (BRN) lead for 265/1/60 units, or
208 v (RED) lead for 208/1/60. For 230/1/60 switch RED and
ORG leads at L1 and insulate RED lead. Transformer is energy
limiting or may have circuit breaker.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Typical Aquazone thermostat wiring shown. Refer to thermostat
installation instructions for wiring to the unit. Thermostat wiring
must be Class 1 and voltage rating equal to or greater than unit
supply voltage.
26
Loss of Charge Pressure Switch
National Electrical Code
Field Wiring Terminal Block
Performance Monitor
Reversing Valve Solenoid
Transformer
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
Relay/Contactor Coil
Condensate Pan
Solenoid Coil
Temperature Switch
Thermistor
Ground
Wire Nut
6. 24-v alarm signal shown. For dry alarm contact, cut JW1 jumper
and dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via control board standoffs and
screws to control box. (Ground available from top two standoffs
as shown.)
8. For high or low speed remove BLU wire from BR ‘NO’ and
replace with BLK or RED wire respectively. Tape off unused
terminal.
9. Both DIP switches need to be in the ON position.
TYPICAL AQUAZONE™ DELUXE D CONTROL WIRING
Aquazone
Thermostat
PM
LEGEND
AL
BM
BMC
CB
CC
CO
FP1
FP2
HP
JW1
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Blower Motor
Blower Motor Capacitor
Circuit Breaker
Compressor Contactor
Sensor, Condensate Overflow
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper, Alarm
LOC
NEC
P1
PM
RVS
Tfrmr
—
—
—
—
—
—
NOTES:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. Transformer is wired to 208 v (RED) lead for 208/3/60. For
230/3/60 switch RED and ORG leads at L1 and insulate RED
lead.
4. FP1 thermistor provides freeze protection for water. When using
antifreeze solutions, cut JW3 jumper.
5. Typical Aquazone thermostat wiring shown. Refer to thermostat
installation instructions for wiring to the unit. Thermostat wiring
must be Class 1 and voltage rating equal to or greater than unit
supply voltage.
Loss of Charge Pressure Switch
National Electrical Code
Field Wiring Terminal Block
Performance Monitor
Reversing Valve Solenoid
Transformer
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Relay/Contactor Coil
Condensate Pan
Solenoid Coil
Thermistor
Ground
Wire Nut
6. 24-v alarm signal shown. For dry alarm contact, cut AL2 dry
jumper and dry contact will be available between AL1 and AL2.
7. Transformer secondary ground via control board standoffs and
screws to control box. (Ground available from top two standoffs
as shown.)
8. Blower motor is factory wired for medium and high speeds. For
any other combination of speeds, attach the lower speed wire to
fan speed relay N.O. wire.
27
Typical control wiring
PREMIERLINK™ CONTROLLER APPLICATIONS WITH COMPLETE C CONTROL
COMPLETE
C
CONTROL
PREMIER
LINK
PWR
Y
HS1/EXH/RVS
W
CR
CR
O
G
R
LEGEND
CR — Control Relay
LWT — Leaving Water Temperature Sensor
SAT — Supply Air Temperature Sensor
SPT — Space Temperature Sensor
NOTE: Reversing valve is on in Cooling
mode.
C
CMP1
FAN
AL2
PWR
J1
J8
AL1
A
J5
J6
S
A
T
CMPSAFE
S
P
T
J4
L
W
T
PREMIERLINK CONTROLLER APPLICATIONS WITH DELUXE D CONTROL
PREMIER
LINK
PWR
DELUXE
D
CONTROL
Y1
HS2
Y2
HS1
LEGEND
LWT — Leaving Water Temperature Sensor
SAT — Supply Air Temperature Sensor
SPT — Space Temperature Sensor
NOTE: Reversing valve is on in Cooling
mode.
W1
O/W2
CMP2
G
CMP1
FAN
C
PWR
J1
J8
R
J5
J6
28
S
A
T
L
W
T
J4
CMPSAFE
S
P
T
AL1
Application data
Aquazone™ water source heat pumps are available in a
flexible, efficient array of models, which can be used in all
types of water loop, ground water, and ground loop type
systems. Aquazone products provide optimal energy
efficient solutions and adapt to the most challenging design
requirements.
AQUAZONE PRODUCT GUIDE
50 SERIES
50RHC,RVC
Horizontal/Vertical
TYPE
SIZE (tons)
Standard
Efficiency
11/2-5
50RHR,RVR
Horizontal/Vertical
High
Efficiency
1/ -5
2
50RHS,RVS
Horizontal/Vertical
Premium
Efficiency
11/4-6
APPLICATION
Efficient, compact, low cost
alternative for retrofit or new
boiler/tower systems.
Efficient, adaptable unit for
new boiler/tower, ground
water, or ground loop systems.
Premium, ultra efficient unit for
new boiler/tower, ground
water, or ground loop systems
Large Capacity Designed to handle large
50HQ,VQ
zoned areas for all
61/2-25
Horizontal/Vertical
applications.
Attractive design for finished
Console
50KQ
1/ -11/
interior, under-window
2
2
installations.
Rooftop
Economical solution for IAQ
50RTG
3-20
problems and tempering
ventilation air.
Water-to-Water Used to pre-heat or cool
50RWS
3-10
air and can be used as a
stand-alone or supplemental
boiler/chiller in most hydronic
heating applications. Also
conditions process fluids,
lubricants and refrigerants.
Water loop system
Water loop (or boiler/tower) system applications typically
include a number of units plumbed to a common piping
system. For optimal performance, this system should be
designed between 2.25 and 3 gpm per ton of cooling capacity. The system is comprised of highly efficient packaged reverse cycle heat pump units interconnected by a
water loop. The water circuit serves as both a sink and
source for heat absorption and rejection and is designed
for entering water temperatures between 60 F and 90 F.
Within this temperature range units can heat or cool as required from the same water source. Transferring heat from
warm to cold spaces in the building, whenever they coexist, conserves energy rather than creating new heat.
Refer to the Carrier Water Source Heat Pump System Design Guide for assistance designing water loop
systems. The guide includes a practical approach for the
most current design recommendations including:
• Product application including horizontal, vertical, console, rooftop and water-to-water applications.
• Ventilation methods and system design including energy
recovery.
• Acoustical considerations for different product types.
• Addressing IAQ issues such as condensate removal,
humidity control.
• Air Distribution Design including diffuser selection/
layout and ductwork design.
• Hydronic System Design including pipe sizing/layout
and boiler/tower sizing.
• Control Configurations such as stand alone, DDC,
DCV, and VVT®.
• WSHP Efficiency/Operational Cost Comparison chart.
• System variations such as a system without a boiler,
variable pumping, and VAV for interior use.
Condensate drainage
Venting — Properly vent condensate lines to prevent fan
pressure from causing water to hang up in the piping.
Condensate lines should be pitched to assure full drainage
of condensate under all load conditions. Use chemical
treatment to remove algae in the condensate pans and
drains in geographical areas that are conducive to algae
growth.
Trapping — Condensate trapping is a necessity on every
water source heat pump unit. A trap is provided to prevent
the backflow of moisture from the condensate pan and into
the fan intake or downstream into the mechanical system.
The water seal or the length of the trap depends on the
positive or negative pressure on the drain pan. As a rule of
thumb, size the water seal 1 in. for every 1 in. of negative
pressure on the unit. The water seal is the distance from
the bottom of the unit condensate piping connection to
the bottom of the condensate drain line run-out piping.
Therefore, the trap size should be double the water seal
dimension.
Horizontal units — Horizontal units should be sloped toward the drain at a 1/4 in. per foot pitch. If it is not possible
to meet the pitch requirement, a condensate pump should
be designed and installed at the unit to pump condensate
to a building drain. Horizontal units are not internally
trapped; therefore an external trap is necessary. Each unit
must be installed with its own individual trap and means to
flush or blowout the condensate drain. It is not acceptable
to use a common trap or vent for multiple units. The condensate piping system should not be designed with a pipe
size smaller than the drain connection pipe size.
Vertical units — Vertical units use a condensate hose inside the cabinet that acts as a trapping loop, making an external trap unnecessary. Install each unit with its own vent
and means to flush or blowout the condensate drain lines.
Do not install a common trap or vent on vertical units.
Water conditioning
In some applications, maintaining proper water quality
may require higher corrosion protection for the water-torefrigerant heat exchanger. Water quality varies from location to location and is unique for each job. Water characteristics such as pH value, alkalinity, hardness, and specific
conductance are important when considering any WSHP
application. Water typically includes impurities and hardness that must be removed. The required treatment will depend on the water quality as well as type of system. Water
problems fall into three main categories:
1. Scale formation caused by hard water reduces the
heat transfer rate and increases the water pressure
drop through the heat exchanger. As water is heated,
minerals and salts are precipitated from a solution
and deposited on the inside surface of the pipe or
tube.
29
Application data (cont)
2. Corrosion is caused by absorption of gases from the
air coupled with water on exposed metal. Corrosion
is also common in salt-water areas.
3. Organic growths such as algae can reduce the heat
transfer rate by forming an insulating coating on the
inside tube surface. Algae can also promote corrosion
by pitting.
NOTE: In most commercial water loop applications, Aquazone™ WSHP units use copper water-to-refrigerant heat
exchanger. Units can also be equipped with a Cupronickel
heat exchanger for applications where water is outside the
standard contaminant limits for a copper heat exchanger.
WATER QUALITY GUIDELINES
CONDITION
pH
ACCEPTABLE LEVEL
7 to 9 range for copper. Cupronickel may be used
in the 5 to 9 range.
Calcium and magnesium carbonate should not
Total Hardness
exceed 20 grains per gallon (350 ppm).
Less than 1 ppm.
Iron Oxides
No level allowable.
Iron Bacteria
Max Allowable
Coaxial
Corrosion*
Level
Metal
Ammonia,
0.5 ppm
Cu
Ammonium Hydroxide
Ammonium Chloride,
0.5 ppm
Cu
Ammonium Nitrate
Ammonium Sulfate
0.5 ppm
Cu
Chlorine/Chlorides
0.5 ppm
CuNi
Hydrogen Sulfide†
None Allowable
—
Use Cupronickel heat exchanger when concentrations
Brackish
of calcium or sodium chloride are greater than 125 ppm
are present. (Seawater is approximately 25,000 ppm.)
*If the concentration of these corrosives exceeds the maximum allowable
level, then the potential for serious corrosion problems exists.
†Sulfides in the water quickly oxidize when exposed to air, requiring that no
agitation occur as the sample is taken. Unless tested immediately at the
site, the sample will require stabilization with a few drops of one Molar zinc
acetate solution, allowing accurate sulfide determination up to 24 hours
after sampling. A low pH and high alkalinity cause system problems, even
when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral water
contains a pH of 7.0.
NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is
equivalent to ppm.
Acoustical design
Sound power levels represent the sound produced by the
source, the WSHP unit, with no regard to attenuation between the source and the space. Acoustical design goals
are necessary to provide criteria for occupied spaces.
These goals help ensure that people are comfortable and
can communicate effectively over the air conditioning system and other background noise sources.
Acoustical design goals are desirable sound pressure levels within a given conditioned space and are represented
by Noise Criteria (NC) curves. Noise Criteria (NC) curve
levels represent a peak over a full spectrum of frequencies.
A high value in a low frequency band has the same effect
on NC level as a lower value in a high frequency band. It is
important that sound levels be balanced over the entire
spectrum relative to the NC curve. The lower the NC criteria curve, the more stringent the room acoustical design
must be to meet the design goals.
It is important to know how to convert the unit ratings
from sound power (Lw) to sound pressure (Lp). This
30
conversion depends on the specifics of the installation’s
acoustic environment.
Assessing an area’s acoustical design means comparing
the sound pressure (Lp) with the NC curve for the selected
area.
Some of the factors that affect conversion of sound
power to sound pressure and consequent NC level include:
• Type of acoustical ceiling
• Use of metal or flex duct
• Absorption in the occupied space
• Location in the occupied space
• Open or closed layout plan
• Use of open or ducted returns
• Orientation of unit to occupant
• Use of lined or unlined duct
OCTAVE BAND SOUND PRESSURE LEVEL (Lp)
ASSOCIATED WITH NC CURVES
NOISE
CRITERIA
CURVES
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
OCTAVE BAND SOUND PRESSURE LEVEL (Lp)
Frequency (Hz)
63 125 250 500 1000 2000 4000 8000
49
36
26
17
17
14
12
11
52
41
33
27
22
19
17
16
54
45
38
31
27
24
22
21
58
49
41
36
31
29
28
27
61
53
45
40
36
34
33
32
64
57
50
45
41
39
38
37
67
61
54
49
46
44
43
42
71
64
58
54
51
49
48
47
74
68
63
58
56
54
53
52
77
71
67
63
61
59
58
57
80
75
71
68
66
64
63
62
WSHP sound control
Analyzing the projected sound level in the conditioned
space caused by a WSHP unit located in a ceiling plenum is
quite involved. The key is to have good sound power
ratings (Lw) in dB on the equipment to determine the
sound attenuation effect of the ductwork, ceiling and room.
Aquazone equipment includes standard attenuating features and offers an advanced mute package. In addition,
Carrier provides suggestions for unit sound design around
the WSHP.
Horizontal units
Use the following guidelines for layout of Aquazone horizontal units to minimize noise:
1. To select quietest equipment, obtain sound power
ratings in accordance with latest standards from
manufacturers.
2. Do not locate units over a space with a required NC
of 40 or less. Instead, locate units above less sensitive
noise areas such as above or in equipment rooms,
utility closets, restrooms, storage rooms, or above
corridors.
3. Provide at least 10 feet between WSHP units to avoid
the additive effect of two noise sources.
4. Provide an acoustical pad underneath the WSHP unit
in applications where the unit must be mounted
above noise sensitive areas such as private offices or
conference rooms. The pad attenuates radiated noise.
Be sure the pad has an area at least twice that of the
WSHP footprint.
5. Maximize the installed height above the suspended
ceiling.
6. Be sure the WSHP unit is located at least 6 feet away
from any ceiling return grille to prevent line-of-sight
casing noise to reach the space below.
7. Suspend the WSHP unit from the ceiling with hangers that use spring or neoprene type isolators to
reduce vibration transmission.
8. Use flexible electrical connections to the WSHP unit.
DO NOT USE NOT RIGID CONNECTIONS.
9. Use flexible loop water and condensate piping connections to the WSHP unit.
10. Use a canvas duct connector to connect the WSHP
discharge to the downstream duct system. This
reduces vibration-induced noise.
11. Provide acoustic interior lining for the first 20 feet of
discharge duct, or until the first elbow is reached. The
elbow prevents line-of-site sound transmission in the
discharge duct.
12. Provide turning vanes in ductwork elbows and tees to
reduce air turbulence.
13. Size the sheet metal supply duct with velocities no
greater than 1000 fpm.
14. Ensure ductwork is rigid.
15. Use round duct whenever possible to further reduce
noise.
16. Allow at least 3 equivalent duct diameters of straight
duct upstream and downstream of the unit before
allowing any fittings, transitions, etc.
17. Seal all penetrations around duct entering the space.
18. Provide a 4-ft run-out duct made of flexible material
to connect a diffuser to the supply trunk duct. The
flex duct provides an “attenuating end-effect” and
reduces duct-transmitted sound before it reaches the
space. Flex duct typically reduces sound by 6 dB.
19. Locate the run-out duct balancing damper as far away
from the outlet diffuser as possible. Locating the
balancing damper at the trunk duct exit is best.
20. If return air is drawn through a ceiling plenum, provide
an acoustically lined return duct elbow or “L” shaped
boot at the WSHP to eliminate line-of-sight noise into
the ceiling cavity and possible through ceiling return
air grilles. Face the elbow or boot away from the nearest adjacent WSHP unit to prevent additive noise.
21. Do not hang suspended ceiling from the ductwork.
Vertical units
All guidelines established for horizontal units also apply for
vertical units. In addition, since vertical units tend to be installed in small equipment rooms or closets, the following
additional guidelines apply:
1. Mount the unit on a pad made of high-density sound
absorbing material such as rubber or cork. Extend the
pad beyond the WSHP unit footprint by at least
6 inches in each direction.
2. Since the unit returns airflow through a grille
mounted in a closet door, provide a sound barrier or
some other modification of the closet to prevent lineof-sight noise into the conditioned space.
3. Follow good duct design practice in sizing and locating the connection of the WSHP discharge to the
supply duct system. Use an elbow with turning vanes
bent in the direction of the fan rotation to minimize
turbulence. Make any duct transitions as smooth and
gradual as possible to again minimize turbulence and
loss of fan static pressure.
Solenoid valves
In applications using variable flow pumping, solenoid
valves can be field installed and operated from the control
board in the Aquazone™ WSHP unit.
Freeze protection
Applications where systems are exposed to outdoor
temperatures below freezing (32 F) must be protected from
freezing. The most common method of protecting water
systems from freezing is adding glycol concentrations into
the water. Use design care when selecting both the type
and concentrations of glycol due to the following:
• Equipment and performance may suffer with high concentrations of glycol and other antifreeze solutions
• Loss of piping pressure may increase greatly, resulting
in higher pumping costs
• Higher viscosity of the mixture may cause excess corrosion and wear on the entire system
• Acidity of the water may be greatly increased, promoting corrosion
• Glycol promotes galvanic corrosion in systems of dissimilar metals. The result is corrosion of one metal by
the other, causing leaks.
31
Application data (cont)
TYPICAL UNIT OPERATING PRSSURES AND TEMPERATURES
ENTERING WATER
FLOW
WATER
GPM/
TEMP
TON
(F)
60
70
80
90
1.5
2.3
3.0
1.5
2.3
3.0
1.5
2.3
3.0
1.5
2.3
3.0
COOLING*
Suction Discharge
Pressure Pressure
(psig)
(psig)
66-75
65-75
64-74
71-82
70-80
69-79
75-85
74-84
72-82
79-90
77-88
75-87
160-190
145-175
130-160
200-230
185-215
175-205
230-260
215-245
200-230
260-290
245-275
230-260
Superheat
(°F)
10-20
15-25
20-30
10-20
15-25
20-30
10-16
13-20
15-25
2- 8
5-12
8-16
HEATING
SubWater
cooling†
Temp
(°F)
Rise (°F)
6-16
8-18
10-20
6-16
8-18
10-20
5-12
7-14
8-15
1- 8
2- 9
3-10
20-23
12-15
8-12
19-22
12-17
7-12
19-22
12-17
7-12
18-21
10-14
6-11
Air
Temp*
Drop
(°F DB)
20-25
20-25
20-25
19-24
19-24
19-24
18-23
18-23
18-23
17-23
17-23
17-23
Suction Discharge
Pressure Pressure
(psig)
(psig)
60-70
63-73
65-75
66-72
68-74
70-76
68-74
70-76
72-76
*Cooling air and water numbers can vary greatly with changes in humidity.
†Subcooling is based upon the head pressure at compressor service port Capillary Tube
Expansion Device.
**Based on Nominal 400 cfm per ton airflow and 70 F EAT heating and 80/67 F EAT cooling.
32
205-230
210-238
215-242
205-230
210-238
215-242
205-230
210-238
215-242
Superheat
(°F)
Subcooling
(°F)
10-18
10-18
10-18
15-25
15-25
15-25
20-35
20-35
20-35
1- 5
1- 5
1- 5
2- 8
2- 8
2- 8
2-10
2-10
2-10
Water
Temp
Drop
(°F DB)
12.1-14.0
7.2- 9.0
5.8- 6.9
14.0-15.2
9.0-10.2
6.7- 7.9
14.2-15.9
9.9-11.1
6.9- 8.1
Air
Temp
Rise**
(°F)
23-29
24-30
25-31
28-34
30-37
31-38
32-39
33-41
35-42
Guide specifications
Packaged Water Source Heat Pumps
HVAC Guide Specifications
Size Range:
18,200 to 59,000 Btuh
Cooling Capacity
22,000 to 68,000 Btuh
Heating Capacity
Carrier Unit: 50RHC, 50RVC
Part 1 — General
1.01 SYSTEM DESCRIPTION
A. Install Water Source Heat Pumps, as indicated on
the plans with capacities and characteristics as listed
in the schedule and the specifications that follow.
Units shall be Carrier unit 50RHC (Horizontal) or
model 50RVC (Vertical) configurations.
B. Units shall be supplied completely factory built and
capable of operation with an entering water temperature range from 60 to 95 F.
Equivalent units from other manufacturers can be
proposed provided approval to bid is given 10 days
prior to bid closing.
C. Units shall be individually packaged with wooden
skid covered with protective corner posts and plastic
stretch wrapping for maximum protection.
1.02 QUALITY ASSURANCE
A. All equipment listed in this section must be rated in
accordance with ARI/ASHRAE/ISO 13256-1 performance standard and CSA. The units shall have
ARI/ISO, NRTL, and CSA labels.
B. All units shall be factory tested under normal operating conditions at nominal water flow rates. This testing shall generate a report card to be shipped with
each unit stating performance in both Heating and
Cooling modes.
C. Serial numbers will be recorded by factory and furnished to contractor for ease of unit warranty status.
Units that are tested without water flow rates are not
acceptable.
Part 2 — Product
2.01 EQUIPMENT
A. General:
1. The horizontal and vertical heat pumps shall be
fabricated from heavy gage galvanized sheet
metal. All interior surfaces shall be lined with
1/ in. thick, 11/ lb acoustic type fiberglass
2
2
insulation. All fiberglass shall be coated and
have exposed edges tucked under flanges to
prevent the introduction of glass fibers into the
airstream. All insulation must meet NFPA 90A.
2. Units shall be prewired and precharged in
factory.
B. Unit Cabinet:
1. Units must be field convertible from side to back
or back to side discharge with no additional
parts or unit structure modification. Units will
have factory-installed hanger brackets and isolation grommets.
2. Horizontal Units shall have one of
the
following
airflow
arrangements:
Right-Discharge/Left-Return; Left-Discharge/
Right-Return; Back-Discharge/Left-Return; or
Back-Discharge/Right-Return as shown on the
plans.
3. Vertical Units shall have one of the following airflow arrangements: Left-Return/TopDischarge, Front-Return/Top-Discharge, or
Right-Return/Top-Discharge. All vertical units
will be supplied from the factory internally
trapped.
4. If units with these arrangements are not used,
the contractor is responsible for any extra costs
incurred by other trades.
5. Cabinets shall have separate openings and
knockouts for entrance of line voltage and low
voltage control wiring. Contractor must ensure
that units can be easily removed for servicing
and coordinate locations of electrical conduit
and lights with the electrical contractor.
6. All units must have a minimum of three access
panels for serviceability of compressor compartment. If other arrangements make servicing difficult, the contractor must provide access panels
and clear routes to ease service. Architect must
approve any changes in layout.
7. All units must have an insulated panel separating the fan compartment from the compressor
compartment.
8. Optional Mute package shall consist of high
technology sound attenuating materials that are
strategically applied to the cabinet, in addition
to the standard system, to further dampen
sound.
9. Units with the compressor in the airstream are
not acceptable.
C. Fan and Motor Assembly:
1. Units rated 60,000 Btuh and under shall have a
direct-drive centrifugal fan. The fan motor shall
be 3-speed, permanently lubricated, PSC (permanent split capacitor) type with internal
thermal overload protection.
2. Blower shall have inlet rings to allow removal of
wheel and motor from one side without removing housing.
3. Units supplied without permanently lubricated
motors must provide external oilers for easy
service.
33
Guide specifications (cont)
4. The fan motor shall be isolated from the fan
housing by torsionally flexible isolation grommets. The fan and motor assembly must be
capable of overcoming the external static pressures as shown on the schedule.
5. CFM/Static pressure rating of the unit shall be
based on a dry coil and a clean filter in place.
D. Refrigerant Components:
1. Units shall have a sealed refrigerant circuit
including a highly efficient reciprocating compressor designed for heat pump operation.
2. Units shall have a capillary tube assembly for
refrigerant metering, an enhanced aluminum
lanced fin and rifled copper tube refrigerant
to air heat exchanger, a reversing valve, a
coaxial (tube-in-tube) refrigerant-to-water heat
exchanger.
3. Hermetic reciprocating compressors shall be
internally isolated. The compressor will be
mounted on isolating grommets. The grommets
will be secured to a heavy gage compressor
plate that has rubber grommet isolation from
the cabinet base. Compressor shall have thermal overload protection and be located in an
insulated compartment away from airstream to
minimize sound transmission.
4. Refrigerant-to-air heat exchangers shall use
enhanced lanced aluminum fins and rifled
copper tube construction rated to withstand
450 psig refrigerant working pressure.
5. Refrigerant-to-water heat exchangers shall be of
copper inner-water tube and steel refrigerant
outer tube design, rated to withstand 450 psig
working refrigerant pressure and 450 psig
working water pressure. Plate-to-plate heat
exchangers cannot be used.
6. Refrigerant metering shall be accomplished by
capillary tube assembly only. Units intended for
use in standard operating range with entering
water temperatures from 60 to 95 F.
7. Reversing valves shall be four-way solenoid activated refrigerant valves, which shall fail to heating operation should the solenoid fail to
function. If the reversing valve solenoid fails to
cooling, a low temperature thermostat must be
provided to prevent over-cooling an already
cold room.
8. Optional cupronickel coaxial water-to-refrigerant
heat exchangers.
E. Drain Pan:
The drain pan shall be constructed to inhibit corrosion and be fully insulated. Drain outlet shall be
located on pan to allow complete and unobstructed
drainage of condensate. Vertical units will have a
factory-installed trap inside of cabinet. The standard
unit will have solid-state electronic condensate overflow protection. Mechanical float switches are not
acceptable.
34
F. Filter:
1. Units shall have a factory installed 1 in. wide filter bracket for filter removal from either side.
Units shall have a 1 in. thick throwaway type
fiberglass filter.
2. The contractor shall purchase one spare set of
filters and replace factory shipped filters on
completion of start-up.
3. Filters shall be standard sizes. If units use nonstandard filter sizes then the contractor shall
provide 12 spare filters for each unit.
4. Field installed 2 in. filter brackets and 2 in.
fiberglass throwaway filters on all units can be
installed by contractor.
G. High Static Blower:
Provides increased airflow at various static pressure
conditions. Available in all sizes for 50RHC,RVC
units.
H. Controls and Safeties:
1. Electrical:
a. A control box shall be located within the unit
compressor compartment and shall contain a
50 va transformer, 24-volt activated, 2 or
3 pole compressor contactor, terminal block
for thermostat wiring and solid-state controller for complete unit operation. Electromechanical operation is not acceptable.
b. Units shall be nameplated for use with timedelay fuses or HACR circuit breakers. Unit controls shall be 24-volt and provide heating or
cooling as required by the remote thermostat/
sensor.
2. Piping:
a. Supply and return water connections shall
be copper FPT fittings and shall be securely
mounted flush to the cabinet corner post
allowing for connection to a flexible hose
without the use of a back-up wrench.
b. All water connections and electrical knockouts must be in the compressor compartment corner post as to not interfere with the
serviceability of unit. Contractor shall be
responsible for any extra costs involved in
the installation of units that do not have this
feature.
3. Unit Controls:
a. Safety controls including a high-pressure
switch, a low-pressure sensor, and a low
water and low air temperature sensor.
Access fittings shall be factory installed on
high and low pressure refrigerant lines to
facilitate field service.
b. Activation of any safety device shall prevent
compressor operation via a lockout device.
The lockout shall be reset at the thermostat
or at the contractor-supplied disconnect
switch.
c. Units which may be reset only at the disconnect switch only shall not be acceptable.
4. The standard Complete C control electronic
control system shall interface with a heat pump
(Y,O) wall thermostat (mechanical or electronic). The control system microprocessor
board shall be specifically designed to protect
against building electrical system noise contamination, EMI, and RFI interference. The control
system shall have the following features:
a. 50 VA transformer.
b. Performance Monitor (PM). The PM warns
when the heat pump is running inefficiently.
c. Anti-short cycle time delay on compressor
operation time delay shall be 5 minutes
minimum.
d. Random start on power up mode.
e. Low voltage protection.
f. High voltage protection.
g. Unit shutdown on high or low refrigerant
pressures.
h. Unit shutdown on low water temperature.
i. Water coil freeze protection (selectable for
water or antifreeze).
j. Air coil freeze protection (check filter
switch).
k. Condensate overflow shutdown.
l. Option to reset unit at thermostat or disconnect. Fault type shall be retained in memory
if reset at thermostat.
m. Automatic intelligent reset. Unit shall automatically reset 5 minutes after trip if the fault
has cleared. Should a fault reoccur 3 times
sequentially then permanent lockout will
occur.
n. Ability to defeat time delays for servicing.
o. Light-emitting diodes (LEDs) to indicate high
pressure, low pressure, low voltage, high
voltage, air/water freeze protection, condensate overflow and control status.
p. The low-pressure switch SHALL NOT be
monitored for the first 90 seconds after a
compressor start command to prevent nuisance safety trips.
q. Remote fault type indication at thermostat.
r. Selectable 24-v or pilot duty dry contact
alarm output.
s. 24-v output to cycle a motorized water valve
with compressor contactor.
t. Electric heat output to control two stages of
electric heat.
u. Service test mode for troubleshooting and
service.
5. Optional electronic Deluxe D Control shall have
all the features of the Complete C control with
the following additional features:
a. 75 VA transformer.
b. A removable thermostat connector.
c. Random start on return from night setback.
d. Intelligent reversing valve operation for
extended life and quiet operation.
e. Night setback control from low temperature
thermostat, with 2-hour override initiated by
a momentary signal from the thermostat.
f. Dry contact night setback output for digital
night setback thermostats.
g. Ability to work with heat/cool (Y, W)
thermostats.
h. Ability to work with heat pump thermostats
using O or B reversing valve control.
i. Single grounded wire to initiate night setback, or emergency shutdown.
j. Boilerless system control can switch automatically to electric heat at low loop water
temperature.
k. Dehumidistat input providing fan control for
dehumidification operating.
l. Multiple units connected to one sensor providing communication for up to 3 water
source heat pumps.
m. Selection of boilerless changeover temperature set point.
n. Compressor relay staging for dual stage
units or in master/slave applications.
6. Carrier PremierLink™ Controller:
This optional control will function with CCN
and ComfortVIEW™ software. It shall also be
compatible with ComfortLink™ controllers. It
shall be ASHRAE 62-99 compliant and Internet ready. It shall accept a CO2 sensor in the
conditioned space and be Demand Control
Ventilation (DCV) ready. The communication
rate must be 38.4K or faster. It shall include an
integrated economizer controller.
I. Field-Installed Accessories:
1. Aquazone™ Thermostat Controls:
a. Programmable multi-stage thermostat with
7-day clock, holiday scheduling, large backlit
display and remote sensor capability.
b. Programmable 7-Day Light Activated Thermostat offers occupied comfort settings with
lights on, unoccupied energy savings with
lights off.
c. Programmable 7-Day Flush Mount Thermostat offers locking coverplate with tamper
proof screws, flush to wall mount, dual point
with adjustable deadband, O or B terminal,
and optional remote sensor.
35
Guide specifications (cont)
2.
3.
4.
5.
6. Y Strainers (Bronze Body) “Y” type configuration with a brass cap. Maximum operating
pressure rating of 450 psi. Strainer screen
made of stainless steel.
7. Solenoid Valves (Brass Body) provide slow
operation for quiet system application.
8. Hose Kit Assemblies includes a ported ball
valve with pressure temperature (P/T) plug
ports, flexible stainless steel hose with swivel
and nipple. Return hose includes a ball valve,
preset measure flow (gpm) with two P/T
ports, flexible stainless steel hose with a swivel
and nipple.
9. Remote sensors for Aquazone™ flush-mount
thermostats.
10. PremierLink™ accessories for providing a fully
integrated DDC system. Accessories include
supply air temperature sensors, communicating room sensors, CO2 sensors, and linkage
thermostats.
d. Programmable 5-Day Thermostat offers
2 stage heat, 2 stage cool, auto changeover,
5-minute built-in compressor protection,
locking cover included.
e. Non-programmable Thermostat with 2 heat
stages, 2 cool stages, auto changeover,
5-minute built-in compressor protection,
locking cover included.
Loop Controller with six stages (2 stages for
heating and 4 stages for heat rejection).
Filter Rack (2 in.) to enhance the filtration system of the water source heat pump.
NOTE: Filter rack does not include filters.
Fire-Rated Hoses kits with a fixed MPT on
one end and a swivel with an adapter on the
other end. Hose kits can be either stainless
steel or galvanized.
Ball Valves (Brass Body) for shut off and balancing water flow. Available with memory,
with memory stop, and pressure temperature
ports.
Carrier Corporation • Syracuse, New York 13221
7-02
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
New Book 1
Pg 36
Catalog No. 525-00029
Printed in U.S.A.
PC 111
Form 50RHC,RVC-1PD
Replaces: New
Tab IP4a
Tab 5a 5a