nvent PROAIR CR43WC User manual

© 2019 nVent 87976466
Rev. G P/N 10-1008-167
PROAIR
Water-Cooled air Conditioner
Cr43WC Model
INSTRUCTION MANUAL

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NOTE: Some of the information in this manual may not apply if a special unit was ordered. If
additional drawings for a special unit are necessary, they have been inserted. Contact Pentair
Equipment Protection if further information is required.
WARRANTY AND RETURN POLICY
https://hoffman.nvent.com/en/hoffman/warranty-information
TABLE OF CONTENTS
WARRANTY AND RETURN POLICY................................................................................................................................................ 2
HANDLING & TESTING THE AIR CONDITIONER........................................................................................................................... 3
INSTALLATION INSTRUCTIONS..................................................................................................................................................... 4
F-GAS INFORMATION...................................................................................................................................................................... 4
TECHNICAL INFORMATION............................................................................................................................................................ 4
Design Data..................................................................................................................................................................................................... 4
DIMENSIONAL DRAWINGS............................................................................................................................................................................ 5
Components List ............................................................................................................................................................................................ 6
STANDARD WIRING DIAGRAM, 115 / 230 VOLT.......................................................................................................................................... 7
TIME DELAY RELAY OPTION WIRE DIAGRAM, 115 / 230 VOLT................................................................................................................. 7
TEMPERATURE CONTROL............................................................................................................................................................................. 8
PRINCIPLES OF OPERATION......................................................................................................................................................................... 8
WATER USAGE................................................................................................................................................................................................ 8
Condenser ............................................................................................................................................................................................... 8
Manual Reset High Pressure Limit Switch ........................................................................................................................................... 8
Water Valve ............................................................................................................................................................................................. 8
Water........................................................................................................................................................................................................ 9
MAINTENANCE................................................................................................................................................................................ 9
Compressor............................................................................................................................................................................................. 9
Evaporator Blower .................................................................................................................................................................................. 9
Refrigerant Loss...................................................................................................................................................................................... 9
Freezing and Draining the System......................................................................................................................................................... 9

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RECEIVING THE AIR CONDITIONER
Inspect the thermoelectric cooler. Check for concealed damage that may have occurred during shipment. Look
for dents, scratches, loose assemblies, etc. Damage evident upon receipt should be noted on the freight bill.
Damage should be brought to the attention of the delivering carrier -- NOT to Pentair Equipment Protection --
within 15 days of delivery. Save the carton and packing material and request an inspection. Then le a claim with
the delivering carrier.
Pentair Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any
way possible.
HANDLING & TESTING THE AIR CONDITIONER
If it is necessary to place the air conditioner in a horizontal position after unpacking, be certain it is placed in an
upright, vertical or mounting position for a minimum of ve (5) minutes before operating.
Never attempt to operate the air conditioner while it is horizontal or on its side, back or front. The refrigeration
compressor is lled with lubricating oil. Running the compressor without oil in the lower part of the housing will
cause permanent damage to the air conditioner. This also voids the warranty.
TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
Refer to the nameplate for proper electrical current requirements, then connect power cord to a properly grounded
power supply. Minimum circuit ampacity should be at least 125% of the amperage shown in the design data
section for the appropriate model. No other equipment should be connected to this circuit to prevent overloading.
Connect to clean, pressurized water supply and provide drain.
Operate the air conditioner for ve (5) to ten (10) minutes. No excessive noise or vibration should be evident
during this run period. The evaporator blower (enclosure air), and the compressor should be running. The
compressor is provided with automatic reset thermal overload protection. This thermo-switch is located and
mounted inside the plastic enclosure clipped to the compressor. The only time this switch should operate is when
the compressor overheats due to ambient air temperatures exceeding nameplate rating or if enclosure dissipated
heat loads exceed the rated capacity of the air conditioner. The thermal overload switch will actuate and stop
compressor operation. The blower will continue to operate and water will continue to ow for a short period. The
compressor will restart after it has cooled to within the thermal overload cut-in temperature setting.
The unit will also shut down if water supply is interrupted. See WATER USAGE section.

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INSTALLATION INSTRUCTIONS
1. Inspect air conditioner. Verify functionality before mounting the air conditioner, see HANDLING &
TESTING THE AIR CONDITIONER on page 3
2. Using the cutout dimensions shown in this manual or the cutout template printed on the units
shipping carton, prepare the air “IN” and air “OUT” openings, and mounting bolt hole pattern for the
enclosure.
3. Using the gasket kit provided, install gaskets to air conditioner. See gasket kit illustration in this
manual for proper location.
4. Mount air conditioner on enclosure using mounting bolts and screws provided. EZ-mount tabs can
be used to hold unit on enclosure while mounting in place. Connect water inlet and outlet ttings
to a clean pressurized water supply. Allow unit to remain upright for a minimum of ve (5) minutes
before starting. Caution! Air conditioner must be in upright position during operation.
5. To avoid cross-threading mounting inserts, start bolts by hand before tightening with a wrench or
ratchet driver.
6. Refer to top of nameplate for electrical requirements. Connect the power cord to a properly
grounded power supply. Use of an extension cord is not recommended. Electrical circuit should be
fused with slow blow or HACR circuit breaker.
F-GAS INFORMATION
CR430816GWXXX
CR430826GWXXX
Refrigerant
Kühlmittel
Chłodziwo R134a
GWP 1430
Factory Charge
Füllmenge durch Hersteller
Opłata Fabryczna
341 Grams
341 Gramm
341 Gramów
CO2Equivalent
CO2Equivalent
CO2Ekwilalent
0.49 Tons
0,49 Tonnen
0,49 Tony
TECHNICAL INFORMATION
DESIGN DATA
Model Voltage Hertz Full Load
Amps Phase
BTU/Hr.
@ 131 F
Enclosure
Temperature
Maximum
°F Water
Temperature
Maximum
Water
Usage
(GPM)
Shipping
Weight
lb./kg
CR43-0816-GWXXX 115 50/60 13.0 / 13/0 18500 90 1.5 137 / 62
CR43-0826-GWXXX 230 50/60 6.6 / 6.5 18500 90 1.5 137 / 62
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specic model numbers.

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DIMENSIONAL DRAWINGS

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MOUNTING GASKET KIT
Rear view of mounting gasket kit
part number 43-2000-02
MOUNTING CUTOUT DIMENSIONS
COMPONENTS LIST
Part Description Part Number
115 Volt 230 Volt
Blower, Evaporator 38-2019-04 38-2020-04
Capacitor, Compressor 10-1032-15 10-1032-18
Coil, Condenser Water 47-6121-00 47-6121-00
Coil, Evaporator 43-2002-01 43-2002-01
Compressor 10-1016-68 10-1026-80
Contactor (optional) 10-1005-41 10-1005-42
Filter/Dryer 52-6028-00 52-6028-00
Relay, Compressor Start 10-1028-14 10-1028-15
Relay, Time Delay, (optional) 10-1005-71 10-1005-71
Service Cord 52-6035-01 52-6035-74
Switch, Manual Reset Pressure 52-6104-48 52-6104-48
Thermal Overload, Compressor 10-1007-50 10-1007-49
Thermostat, SPST, 55-100F 10-1061-02 10-1061-02

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STANDARD WIRING DIAGRAM, 115 / 230 VOLT
TIME DELAY RELAY OPTION WIRE DIAGRAM, 115 / 230 VOLT

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TEMPERATURE CONTROL
The electromechanical thermostat is factory preset to 75 F / 23 C. To change the temperature setting, remove the
front cover. Use a standard screwdriver to adjust thermostat. For cooler temperatures turn clockwise, for warmer
temperatures turn counterclockwise.
PRINCIPLES OF OPERATION
If electrical power to the air conditioner is interrupted and reapplied immediately, (within 3 to 5 seconds), the
compressor may not restart due to the high back pressure of the compressor. It takes a minimum of one (1)
minute after shut-down for the compressor suction and discharge pressures to equalize in order for the air
conditioner to restart.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties.
It is recommended that the warranty section of this manual be read in order to familiarize yourself with
parameters of restricted operation.
The moisture that the enclosure air can contain is limited. If moisture ows from the drain tube continuously this
can only mean that ambient air is entering the enclosure. Be aware that frequent opening of the enclosure’s door
admits humid air which the air conditioner must then dehumidify.
WATER USAGE
CONDENSER
The water cooled air conditioner uses water as the cooling medium for the condensing side of the
hermetic refrigeration system. This water is passed through a heat exchanger that uses the cool water
to lower the temperature of the hot gaseous refrigerant, causing it to condense. The water is warmed
by this exchange of heat, and is passed out of the air conditioner at an elevated temperature. The inlet
and outlet water ttings are located on the bottom of the air conditioner. A sealant is recommended
when connecting the inlet and outlet water lines to prevent leakage. It is extremely important for the air
conditioner to have an uninterrupted supply of clean cooling water. Interference with the water supply will
cause the unit to automatically shut down and require manual reset.
MANUAL RESET HIGH PRESSURE LIMIT SWITCH
The manual reset high pressure limit switch is located behind the front cover. This limit switch interrupts
compressor operation when condenser refrigerant exceeds 310 PSIG, which most frequently occurs as
a result of the condenser water supply being reduced or shut down. After identifying and correcting the
problem with the water supply to the unit, compressor operation can be restored by pushing the manual
reset button located on the switch.
WATER VALVE
The valve that controls the ow of condensing water is also located behind the front cover. This
valve modulates the ow of water to the condensing coil. Water ow varies according to a variety of
loading conditions, including electrical load, inlet water temperature, ambient air temperature, cabinet
construction, etc. The maximum ow rate in the DESIGN DATA is given for the conditions of maximum
rated load, maximum water temperature, and maximum ambient temperature, and reects the highest
ow rate anticipated for the unit.
NOTE: This valve has been preset at the factory for the correct operation of the unit. The
setting of the valve should not be altered.

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WATER
The air conditioner water supply does not require special treatment, but care should be taken to avoid any
gross contamination. Corrosives may cause leakage within the coil and water lines. Mineral rich water will
cause scaling of the coil, degrading performance. Particulates may cause rapid erosion of the coil, and
could result in clogging of the control valve.
NOTE: A filter to clean the air conditioner water supply is recommended.
If the temperature of the inlet water is higher than that shown in the DESIGN DATA, it will result in a higher
ow rate, and may cause shut-down of the unit. High inlet water temperatures should be avoided.
When the air conditioner is shut-down, either because of a thermostatic cut-out or a loss of power, the
water ow should gradually diminish to zero. If water ow persists, it may indicate a malfunction of the
control valve. Information on the specic valve employed is supplied with the air conditioner.
MAINTENANCE
COMPRESSOR
The compressor requires no maintenance. It is hermetically sealed, properly lubricated at the factory and
should provide years of satisfactory operating service.
Should the refrigerant charge be lost, recharging ports (access ttings) on the suction and discharge
sides of the compressor are provided for recharging and/or checking suction and discharge pressures.
Under no circumstances should the access tting covers be loosened, removed or tampered with.
Breaking of seals on compressor access ttings during warranty period will void warranty on hermetic
system.
Recharging ports are provided for the ease and convenience of reputable refrigeration repair service
personnel for recharging the air conditioner.
EVAPORATOR BLOWER
Blower motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for
the life of the motor.
REFRIGERANT LOSS
Each air conditioner is thoroughly tested prior to leaving the factory to insure against refrigeration leaks.
Shipping damage or microscopic leaks not found with sensitive electronic refrigerant leak detection
equipment during manufacture may require repair or recharging of the system. This work should only be
performed by qualied professionals, generally available through a local, reputable air conditioning repair
or service company.
Refer to the data on the nameplate which species the type of refrigerant and the charge size in ounces.
Before recharging, make sure there are no leaks and that the system has been properly evacuated into a
deep vacuum.
FREEZING AND DRAINING THE SYSTEM
The air conditioner can be severely damaged by freezing if not
properly drained. Damage due to freezing is not covered by the
warranty.
WARNING
If the unit is to be shipped to, or stored in an area that experiences climatic extremes, care must be taken
to fully drain the unit to avoid freezing. The location of the drain is shown in the OUTLINE DRAWING.
To completely drain the unit, it is recommended that 100 psi maximum compressed air be applied to
the water inlet, while lifting the spring of the valve with a screwdriver to allow free passage of water. An
alternate means would be to start the air conditioner and allow the refrigeration system pressure to open
the valve while air pressure is applied to inlet.

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NOTES