McLean ProAir CR43 User manual

INSTRUCTION MANUAL FOR:
ProAir CR43
McLean Thermal
11611 Business Park Blvd. N Champlin, MN 55316
Tel: [phone] Fax: [phone]
www.mcleanthermal.com

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ProAir CR43
Instruction Manual
TABLE OF CONTENTS
Receiving the Air Conditioner ..........................................................................1
Handling and Testing the Air Conditioner........................................................1
Installation........................................................................................................2
System Controls...............................................................................................2
Design Data, Model Drawing...........................................................................3
Cut out drawing................................................................................................4
Components List..............................................................................................5
Wire Diagrams .................................................................................................6
Temperature Control........................................................................................8
Principles of Operation.....................................................................................8
Maintenance................................................................................................. 8-9
Trouble Shooting......................................................................................10-11
McLean Thermal Warranty ............................................................................12
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 McLean Thermal if further
information is required.
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 McLean
Thermal -- within 15 days of delivery. Save the carton and packing material and request an inspection.
Then file a claim with the delivering carrier.
McLean Thermal 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 five (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 filled 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 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.

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Figure 1
Operate the air conditioner for five (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 filter 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.
INSTALLATION
Step 1: Inspect air conditioner. Verify functionality before mounting the air conditioner, see Handling &
Testing the Air Conditioner on page 1.
Step 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.
Step 3: Using the gasket kit provided, install gaskets to air conditioner. See gasket kit illustration in this
manual for proper location.
Step 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 five (5) minutes before starting. Caution: Air
conditioner must be in upright position during operation.
Step 5: 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.
Step 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. Open the front panel by loosening the front panel
screw. Refer to figure 2 (page 4) to locate the controller. Turn the controller
adjustment screw slot counter-clockwise to increase and clockwise to decrease
the temperature set pint (see figure 1). The thermostat cooling setpoint 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 and 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 (standard) or 10-1008-162 (low ambient).

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MAX Shipping
BTU/Hr @ Amps @ BTU/Hr @ Amps @ Amb Temp Weight
Model Voltage Hz Phase
1310F/1310F 1310F/1310F1310F/1310F 950F/950FoF/oCLbs/Kgs
CR43-0615-XXX 115 50/60 1 5800/6000 14.6/13.7 4800/5100 12.5/11.0 131/55 131/59
CR43-0616-XXX 115 60 1 6000 13.7 5100 11.0 131/55 131/59
CR43-0625-XXX 230 50 1 6000 6.8 5100 5.3 131/55 131/59
CR43-0626-XXX 230 60 1 6000 6.9 5100 5.5 131/55 131/59
CR43-0815-XXX 115 50/60 1 7500/8500 15.0/16.0 6700/7500 13.5/12.9 131/55 138/63
CR43-0816-XXX 115 60 1 8500 16.0 7500 12.9 131/55 138/63
CR43-0825-XXX 230 50 1 7500 8.0 7500 6.1 131/55 138/63
CR43-0826-XXX 230 60 1 8500 8.2 7500 6.3 131/55 138/63
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specific model numbers.
CR43 Model Drawing
ProAir CR43
6000-8500 BTU/Hr. (1758-2490 Watts) HxWxD: 43.31" (1100) x 15.75" (400) x 10.25" (260
)

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CR43 Components List (Table A)
CR43 Mounting Cutout Dimension
CUT-OUT NOTES:
1. DASH LINES REPRESENT AIR
CONDITIONER.
2. CUT-OUT DIMENSIONS FOR STANDARD
PRODUCT ONLY.
CR43 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” INLET AND 6”
OUTLET CLEARANCE FOR PROPER
AMBIENT AIR FLOW. ALLOW 20”
ABOVE FILTER FOR REMOVAL.
MOUNTING GASKET KIT
PART NO. 43-2000-09 AS APPLIED TO
REAR OF CR43.

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CR43 Wire Diagram, Level I
CR43-0615-XXX CR43-0616-XXX CR43-0625-XXX CR43-0626-XXX
115 Volt 115 Volt 230 Volt 230 Volt
Part Description 50/60 HZ 6000 BTU 60 HZ 6000 BTU 50 HZ 6000 BTU 60 HZ 6000 BTU
Blower, Condenser 38-2019-04 38-2019-04 38-2020-04 38-2020-04
Blower, Evaporator 43-2013-01 43-2013-01 43-2013-02 43-2013-02
Capacitor, Compressor 52-6032-01 52-6032-01 52-6031-01 52-6031-01
Compressor 10-1016-10 10-1016-10 10-1025-08 10-1026-08
Thermal Overload,
Compressor 10-1007-04 10-1007-04 10-1007-08 10-1007-11
Filter, Air, Reusable 10-1000-44 10-1000-44 10-1000-44 10-1000-44
Thermostat, SPST, 55-100F 52-6155-00 52-6155-00 52-6155-00 52-6155-00
Mounting Gasket Kit 43-2000-09 43-2000-09 43-2000-09 43-2000-09
Relay, Compressor N/A N/A N/A N/A
Power Cord 52-6035-01 52-6035-01 52-6035-13 52-6035-13
Evaporator Coil 43-2002-00 43-2002-00 43-2002-00 43-2002-00
CR43-0815-XXX CR43-0816-XXX CR43-0825-XXX CR43-0826-XXX
115 Volt 115 Volt 230 Volt 230 Volt
Part Description 50/60 HZ 8500 BTU 60 HZ 8500 BTU 50 HZ 7500 BTU 60 HZ 8500 BTU
Blower, Condenser 52-6034-10 52-6034-10 52-6025-10 52-6025-10
Blower, Evaporator 38-2019-04 38-2019-04 38-2020-04 38-2020-04
Capacitor, Compressor 52-6032-01 52-6032-01 52-6031-01 52-6031-01
Compressor 10-1016-10 10-1016-10 10-1025-10 10-1026-10
Thermal Overload,
Compressor 10-1007-04 10-1007-04 10-1007-09 10-1007-12
Filter, Air, Reusable 10-1000-44 10-1000-44 10-1000-44 10-1000-44
Thermostat, SPST, 55-100F 52-6155-00 52-6155-00 52-6155-00 52-6155-00
Mounting Gasket Kit 43-2000-09 43-2000-09 43-2000-09 43-2000-09
Relay, Compressor N/A N/A N/A N/A
Power Cord 52-6035-33 52-6035-33 52-6035-13 52-6035-32
Evaporator Coil 43-2002-01 43-2002-01 43-2002-01 43-2002-01
Figure 2
Part Description Part No.
1 Condenser Coil 43-2001-00
2 Filter, drier. Refrigerant 52-6028-00
3 Compressor See Table A
4 Hot gas bypass valve 52-6027-00
5 Evaporator Coil See Table A
6 Inlet air filter, reusable aluminum 10-1000-44
7 Evaporator blower See Table A
8 Compressor thermal overload switch See Table A
9 Capacitor, compressor See Table A
10 Mounting gasket kit 43-2000-09
11 Terminal block 86912
12 Power cord See Table A
13 Temperature controller Level I Level
II (digital) 52-6155-00 10-1106-14
14 Relay (Level II only) 10-1005-21
15 Transformer (Level II only) 115v / 230v 10-1006-94 10-
1006-93
16 Condenser Blower See Table A
17 Condensate Pan 43-2017-00

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CR43 Wire Diagram, Level II & III
NOTE: For voltage, hertz, and options not shown in this manual, refer to the wiring diagram attached to the unit.

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TEMPERATURE CONTROL

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The electromechanical thermostat is factory preset to 75oF/23oC. To change the temperature setting,
remove the nylon plug from the back face of the unit. 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 flows 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.
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 fittings) 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 fitting covers be loosened, removed or tampered with.
Breaking of seals on compressor access fittings 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.
Inlet Air Filter
Proper maintenance of the inlet air filter, located behind the right side panel, will assure normal operation of
the air conditioner. If filter maintenance is delayed or ignored, the maximum ambient temperatures under
which the unit is designed to operate will be decreased.
If the compressor’s operating temperature increases above designed conditions due to a dirty or clogged
filter (or plugged condenser coil), the air conditioner’s compressor will stop operating due to actuation of the
thermal overload cut-out switch located on the compressor housing. As soon as the compressor
temperature has dropped to within the switch’s cut-in setting, the compressor will restart automatically.
However the above condition will continue to take place until the filter or coil has been cleaned. It is
recommended that power to the air conditioner be interrupted intentionally when abnormally high
compressor operating temperature causes automatic shut-down of the unit.
The above described shut-down is symptomatic of a clogged or dirty filter, thus causing a reduction in
cooling air flow across the surface of the compressor and condenser coil.
Do not run the air conditioner for extended periods of time with the filter removed. Particles of dust, lint, etc.,
can plug the fins of the condenser coil which will give the same reaction as a plugged filter. The condenser
coil is not visible through the filter opening, so protect it with a filter.

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Continued operation under the above conditions can and will damage and shorten compressor life. The
air conditioner is available with an easily removable inlet filter to facilitate necessary cleaning. There
should be no reason to neglect this necessary maintenance.
How To Remove, Clean or Install a New Inlet Air Filter
RP aluminum washable air filters are designed to provide excellent filtering efficiency with a high dust
holding capacity and a minimum amount of resistance to air flow. Because they are constructed entirely
of aluminum they are lightweight and easy to service. Optimum filter performance is maintained by
recoating the filters after washing with RP Super Filter Coat adhesive. To achieve maximum performance
from your air handling equipment, air filters should be cleaned on a regular basis.
The inlet air filter is located behind the right side panel. To access filter, pull from slot in top cover. The
filter may now be cleaned or new filter installed.
Cleaning Instructions:
1. Flush the filter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS.
2. After flushing allow filter to drain. Placing it with a corner down will assure complete drainage.
3. Recoat the filters with RP Super Filter Coat adhesive. When spraying filter do so from both sides for
maximum concentration of adhesive.
Condenser and Evaporator Blowers
Blower motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for
the life of the motor.
If the condenser blower motor (ambient blower) should fail, it is not necessary to remove the air
conditioner from the cabinet or enclosure to replace the blower. The condenser blower is mounted on its
own bulkhead and is easily accessible by opening the front cover.
Caution: Operation of the air conditioner in areas containing airborne caustics or chemicals can rapidly
deteriorate filters, condenser coils, blowers and motors, etc. Contact McLean Thermal for special
recommendations.
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 qualified professionals, generally available through a local, reputable air conditioning repair
or service company.
Refer to the data on the nameplate which specifies 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.