nVent Hoffman PROAIR CR29 Series User manual

© 2018 nVent 89104461
Rev. I P/N 89104461
PROAIR
Air Conditioner
Cr29 Model
INSTRUCTION MANUAL

© 2018 nVent 89104461
- 2 - © 2018 nVent
89104461 - 3 -
WARRANTY AND RETURN POLICY
https://hoffman.nvent.com/en/hoffman/warranty-information
TABLE OF CONTENTS
Warranty and Return Policy.............................................................................................................................................................2
RECEIVING THE AIR CONDITIONER...............................................................................................................................................3
HANDLING AND TESTING THE AIR CONDITIONER......................................................................................................................3
INSTALLATION INSTRUCTIONS .....................................................................................................................................................4
SYSTEM CONTROLS........................................................................................................................................................................4
Level I Temperature Controller ......................................................................................................................................................................4
Level II and III Temperature Controller ..........................................................................................................................................................4
TECHNICAL INFORMATION............................................................................................................................................................5
DESIGN DATA..................................................................................................................................................................................................5
DIMENSION DRAWING...................................................................................................................................................................................5
CR29 Models 2700-4000 BTU/Hr. (791-1172 Watt) ............................................................................................................................5
Mounting Gasket Kit.......................................................................................................................................................................................6
Design Notes...........................................................................................................................................................................................6
Mounting Cutout Dimensions........................................................................................................................................................................6
Components List ............................................................................................................................................................................................7
Parts List .........................................................................................................................................................................................................7
Wire Diagrams and schematics ....................................................................................................................................................................8
Wire Diagram, Level 1, 2000 BTU ..........................................................................................................................................................8
Schematic, Level 1, 2000 BTU ...............................................................................................................................................................8
Wire Diagram, 115V, Level 1, 4000 BTU ................................................................................................................................................9
Schematic, 115V, Level 1, 4000 BTU .....................................................................................................................................................9
Wire Diagram, 230V, Level 1, 4000 BTU ..............................................................................................................................................10
Schematic, 230V, Level 1, 4000 BTU ...................................................................................................................................................10
Wire Diagram, Level II and III, 2000 BTU .............................................................................................................................................11
Schematic, Level II and III, 2000 BTU..................................................................................................................................................12
Wire Diagram, 115 VLevel II and III, 4000 BTU ...................................................................................................................................13
Schematic, 115 V Level II and III, 4000 BTU .......................................................................................................................................13
Wire Diagram, 230 V Level II and III, 4000 BTU ..................................................................................................................................14
Schematic, 230 V Level II and III, 4000 BTU .......................................................................................................................................14
TEMPERATURE CONTROL........................................................................................................................................................... 15
PRINCIPLES OF OPERATION ....................................................................................................................................................... 15
MAINTENANCE............................................................................................................................................................................. 15
Compressor...................................................................................................................................................................................................15
Inlet Air Filter .................................................................................................................................................................................................15
How To Remove, Clean or Install a New Inlet Air Filter .............................................................................................................................16
Condenser and Evaporator Air Movers.......................................................................................................................................................16
Refrigerant Loss............................................................................................................................................................................................16
TROUBLE SHOOTING ................................................................................................................................................................... 18
Basic Air Conditioning Trouble Shooting Check List.................................................................................................................................18
Symptoms and Possible Causes:................................................................................................................................................................19

© 2018 nVent 89104461
- 2 - © 2018 nVent
89104461 - 3 -
RECEIVING THE AIR CONDITIONER
Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents,
scratches, loose assemblies, evidence of oil, 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 nVent 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.
nVent Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any
way possible.
HANDLING AND TESTING THE AIR CONDITIONER
If the air conditioner has been in a horizontal position, be certain it is placed in an upright, vertical or mounting
position for a minimum of ve (5) minutes before operating.
Do not 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. This will cause permanent damage to the air
conditioner and also voids the warranty.
CAUTION
TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
Refer to the nameplate for proper electrical current requirements, and then connect the 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.
Operate the air conditioner for ve (5) to ten (10) minutes. No excessive noise or vibration should be evident
during this run period. The condenser blower (ambient air), the evaporator blower (enclosure air), and the
compressor should be running.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes.
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 switch operates when the compressor
overheats due to clogged or dirty inlet air lter or if ambient air temperatures exceed 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 blowers will continue to operate and the compressor will restart
after it has cooled to within the thermal overload cut-in temperature setting.

© 2018 nVent 89104461
- 4 - © 2018 nVent
89104461 - 5 -
INSTALLATION INSTRUCTIONS
1. Inspect air conditioner and verify functionality before mounting the air conditioner, see HANDLING
AND TESTING THE AIR CONDITIONER on page 3.
2. Using the cutout dimensions shown in this manual, 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 Mounting Gasket Kit on page
6for proper location.
4. Mount air conditioner on enclosure using mounting bolts and washers provided to secure unit to
enclosure. 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. Refer to the top of the 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.
6. When the unit is equipped with an automatic temperature controller, the controller is preset at the
factory for your convenience and should not require adjustment.
SYSTEM CONTROLS
LEVEL I TEMPERATURE CONTROLLER
The Level I controller is located inside the air
conditioner. To adjust, disconnect power to the air
conditioner and open the front panel by loosening the
front panel screw. Refer to Figure 2 on page 7 to
locate the controller. Turn the controller adjustment
screw slot counter-clockwise to increase and
clockwise to decrease the temperature set point, see
Figure 1. The thermostat cooling set point is indicated
by the alignment of the adjustment screw slot with the
dial decal. After completing adjustment, close the front
panel and tighten the front panel screw. Restore power
to the air conditioner for operation.
LEVEL II AND III TEMPERATURE
CONTROLLER
The Level II and III controller mounted on the air
conditioner front panel is factory set for standard
operation. All operating parameters are programmable
for custom applications. Refer to the Level II and III
programming and Operating Instruction Manual,
10-1008-161.
Figure 1
Level I control

© 2018 nVent 89104461
- 4 - © 2018 nVent
89104461 - 5 -
TECHNICAL INFORMATION
DESIGN DATA
Model Voltage Hz Phase BTU/Hr @
131 F/131 F Amps @ 131 F/131 F BTU/Hr @ 95 F/95 F Amps @ 95 F/95 F
Max
Amb
Temp
°F/°C
Shipping
Weight
lb./kg
CR290216GXXX 115 50/60 12600/3000 9.2/7.8 1900/2400 9.0/6.9 131/55 98/44
CR290226GXXX 230 50/60 12600/2700 3.7/3.6 2200/2700 3.4/3.1 131/55 98/44
CR290416GXXX 115 50/60 13500/4000 12.7/12.1 2400/2800 11.9/9.4 131/55 118/54
CR290426GXXX 230 50/60 13500/4000 4.7/4.9 2400/2800 4.1/4.2 131/55 118/54
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specic model numbers.
DIMENSION DRAWING
CR29 MODELS 2700-4000 BTU/HR. (791-1172 WATT)

© 2018 nVent 89104461
- 6 - © 2018 nVent
89104461 - 7 -
MOUNTING GASKET KIT
DESIGN NOTES
1. Gasket kit included. Apply gasket to rear
of air conditioner before mounting on
enclosure.
2. Service cord terminated with
appropriate plug cap.
3. Millimeter dimensions [ ] are for
reference only; do not convert to inch
dimensions.
4. Allow at least 4 inch inlet and 6 inch
outlet clearance for proper ambient
air ow. Allow 20 inch above lter for
removal.
Mounting gasket kit part no. 29-4100-02 as applied to
rear of CR29.
MOUNTING CUTOUT DIMENSIONS
1. DASHED LINES REPRESENT OUTSIDE OF AIR C
ONDITIONER
NOTE:
Cutout Instructions

© 2018 nVent 89104461
- 6 - © 2018 nVent
89104461 - 7 -
COMPONENTS LIST
Part Description 115 Volt
2700 115 Volt 4000 230 Volt 3000 230 Volt 4000
Blower, Condenser 29-4121-10 29-4121-10 29-4120-10 29-4120-10
Blower, Evaporator 29-4121-10 29-4121-10 29-4120-10 29-4120-10
Capacitor, Compressor, Start 89111993 N/A 89117017 89104095
Compressor 89108747 89100365 89108748 89104088
Thermal Overload, Compressor 89111994 N/A 89111997 89112198
Filter, Air, Reusable 10-1000-32 10-1000-32 10-1000-32 10-1000-32
Thermostat, SPST, 55-100F 10-1061-16 10-1061-16 10-1061-16 10-1061-16
Mounting Gasket Kit 29-4100-02 29-4100-02 29-4100-02 29-4100-02
Relay, Compressor, Start 89111992 N/A 89111995 89104096
Power Cord Consult factory Consult factory Consult factory Consult factory
Capacitor, Compressor, Run N/A N/A N/A 89104097
PARTS LIST
Part Description Part No.
1Condenser Coil 29-4101-00
2Filter, drier, refrigerant 52-6028-00
3Compressor See Components List
4Hot Gas bypass valve
(CR29-04xx units only) 89100261
5Evaporator coil 29-4102-00
6Inlet air lter,
reusable aluminum 10-1000-32
7Blower (115V)
Blower (230V) 29-4121-10 29-4120-10
8Compressor thermal
overload switch See Components List
9Capacitor, compressor, start (CR290426 and CR290446
units only) See Components List
10 Capacitor, compressor (CR2902XX and
CR290416GXXX units only) See Components List
11 Terminal block 086912
12 Power cord Consult Factory
13 Temperature controller Consult Factory
14 Relay, compressor, start (CR290426 and CR290446
units only) See Components List
15 Relay, compressor (CR2902XX and
CR290416GXXX units only) See Components List
16 Mounting gasket kit 29-4100-02
17 Capacitor, Compressor, Run See Components List












  


Figure 2

© 2018 nVent 89104461
- 8 - © 2018 nVent
89104461 - 9 -
WIRE DIAGRAMS AND SCHEMATICS
WIRE DIAGRAM, LEVEL 1, 2000 BTU
89111534 A
SCHEMATIC, LEVEL 1, 2000 BTU

© 2018 nVent 89104461
- 8 - © 2018 nVent
89104461 - 9 -
WIRE DIAGRAM, 115V, LEVEL 1, 4000 BTU
SCHEMATIC, 115V, LEVEL 1, 4000 BTU
NOTE: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram
attached to the unit.

© 2018 nVent 89104461
- 10 - © 2018 nVent
89104461 - 11 -
WIRE DIAGRAM, 230V, LEVEL 1, 4000 BTU
SCHEMATIC, 230V, LEVEL 1, 4000 BTU
NOTE: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram
attached to the unit.