McLean Cooling Technology SPECTRACOOL G28 1-Phase User manual

© 2012 Pentair Technical Products 88026306
Rev. G P/N 10-1008-233
Protecting Electronics.
Exceeding Expectations.™
Pentair Technical Products
2100 Homan Way
Anoka, MN 55303
[phone]
[phone]
www.McLeanCoolingTech.com
INSTRUCTION MANUAL
SPECTRACOOL™
Air Conditioner
G28 1-Phase Model

© 2012 Pentair Technical Products 88026306 - 2 -
TABLE OF CONTENTS
RECEIVING THE AIR CONDITIONER .............................................................................................................................................................. 3
HANDLING AND TESTING THE AIR CONDITIONER ................................................................................................................................. 3
HOW TO READ MODEL NUMBERS ............................................................................................................................................................... 3
DIMENSIONAL DRAWINGS ............................................................................................................................................................................. 4
4000 BTU 115V ........................................................................................................................................................................................... 4
6000 and 4000 BTU 230V ........................................................................................................................................................................ 4
INSTALLATION INSTRUCTIONS ..................................................................................................................................................................... 5
TECHNICAL INFORMATION ............................................................................................................................................................................ 6
Sequence of Operation ........................................................................................................................................................................... 6
Heating .................................................................................................................................................................................................. 6
Cooling .................................................................................................................................................................................................. 6
Standard and Optional Component Operation ............................................................................................................................. 6
Thermostat ........................................................................................................................................................................................... 6
Head Pressure Control (optional)................................................................................................................................................. 6
230V to 10V Transformer (optional) ............................................................................................................................................ 6
230V to 24V Transformer and Relay (optional) ....................................................................................................................... 6
Refrigerant Properties Chart (R 407c) ................................................................................................................................................ 7
Refrigerant Properties Chart (R 134a) ................................................................................................................................................ 7
Functional Data .......................................................................................................................................................................................... 8
4000 BTU Unit Characteristics ............................................................................................................................................................... 8
6000 BTU Unit Characteristics ............................................................................................................................................................... 9
Wire Diagrams and Schematics ..........................................................................................................................................................10
4000 BTU 1-Phase Wire Diagram (actual unit options may vary) ...................................................................................10
6000 BTU 1-Phase Wire Diagram (actual unit options may vary) ...................................................................................11
4000 BTU 1-Phase Schematic ......................................................................................................................................................12
6000 BTU 1-Phase Schematic (actual unit options may vary) .........................................................................................12
SERVICE DATA ...................................................................................................................................................................................................13
Components List ......................................................................................................................................................................................13
MAINTENANCE .................................................................................................................................................................................................14
Compressor ...............................................................................................................................................................................................14
Inlet Air Filter .............................................................................................................................................................................................14
How To Remove, Clean or Install a New Inlet Air Filter ..............................................................................................................14
Condenser and Evaporator Air Movers ............................................................................................................................................15
Refrigerant Loss........................................................................................................................................................................................15
TROUBLE SHOOTING ......................................................................................................................................................................................16
Basic Air Conditioning Trouble Shooting Check List ..................................................................................................................16
Symptoms and Possible Causes: ........................................................................................................................................................17
WARRANTY ........................................................................................................................................................................................................18
RETURN AND REPAIR POLICY ......................................................................................................................................................................18
LIMITATION OF LIABILITY ..............................................................................................................................................................................19

© 2012 Pentair Technical Products88026306 - 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 Pentair Technical Products -- within 15
days of delivery. Save the carton and packing material and request an inspection. Then le a claim with the delivering
carrier.
Pentair Technical Products 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.
Immediately after applying power, the evaporator blower (enclosure air) should start running. Operate the air
conditioner with the compressor running for ve (5) to ten (10) minutes. You will need to set the cooling thermostat
below the ambient temperature to operate the compressor.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes after the
condenser impellers start.
See Sequence of Operation on page 6 for specics on how the unit operates when powered up.
HOW TO READ MODEL NUMBERS
G28 06 2 6 G150
12345
1. Identies the type/family of air conditioner and the approximate height (i.e. G28 = Global family about
28 inch high).
2. This is the air conditioner’s listed capacity in BTU/Hr. at rated conditions. (i.e. 06=6,000 BTU/Hr. at
131/131 F)
3. 1 = 115 Volt, 2 = 230 Volt, 4 = 460 Volt.
4. 6 = 50/60 Hz or 60 Hz only.
5. Unique set of numbers for each air conditioner which identies the accessories on a model.

© 2012 Pentair Technical Products 88026306 - 4 -
DIMENSIONAL DRAWINGS
4000 BTU 115V
89076942
6000 and 4000 BTU 230V
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88026303
WARM
AIR OUT
COOL AIR OUT
REMOVABLE
HANGING TABS
CLEANABLE, REUSABLE,
ALUMINUM INLET FILTER
BEHIND REMOVABLE PANEL
ACCESS HOLE TO .375 [9.5]
OUTSIDE DIAMETER DRAIN STUB
AMBIENT
AIR IN
POWER INLET
COOLING/HEATING
THERMOSTATS
NOTE:
1. APPROVE TO TYPE 3R, 4, 12
2. MOUNTING GASKET SUPPLIED (NOT SHOWN)
3. UNITS: IN.[MM]
ACCESS PANEL FOR
OPTIONAL HEATER
1/4-20 UNC (11)
MOUNTING HOLES
ENCLOSURE
AIR IN
WARM
AIR OUT
COOL AIR OUT
REMOVABLE
HANGING
TABS
CLEANABLE, REUSABLE, ALUMINUM
INLET FILTER BEHIND REMOVABLE PANEL
NOTE:
1. APPROVE TO TYPE 3R, 4, 12
2. MOUNTING GASKET SUPPLIED (NOT SHOWN)
ACCESS HOLE TO .375 [9.5]
OUTSIDE DIAMETER DRAIN STUB
AMBIENT
AIR IN
POWER INPUT
COOLING THERMOSTAT
HEAT THERMOSTAT
(OPTIONAL)
ACCESS PANEL FOR
OPTIONAL HEATER
MOUNTING HOLES
ENCLOSURE
AIR IN

© 2012 Pentair Technical Products88026306 - 5 -
INSTALLATION INSTRUCTIONS
1. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See
HANDLING AND TESTING THE AIR CONDITIONER on page 3.
2. Using the mounting gasket kit provided with the unit, install gaskets to the air conditioner, see Figure 1.
3. Mount air conditioner on enclosure taking care not to damage the mounting gasket. The mounting
gasket is the seal between the air conditioner and the enclosure. Avoid dragging the air conditioner on
the enclosure with the mounting gasket attached as this could cause rips or tears in the gasket and risk
losing the water tight seal.
4. 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 nameplate for electrical requirements. Wire the unit to a properly grounded power supply.
Electrical circuit should be fused with slow blow or HACR circuit breaker.
6. Some air conditioners require a remote mounted thermostat. Wire the thermostat outputs to the
appropriate terminals on the 24 VAC terminal strip by noting the locations on the correct wiring
diagram.
7. Set thermostat for required cabinet temperature. Refer to Sequence of Operation on page 6 for
thermostat adjustment and operation.
28100013
89059115
Surface Mount Partial Recess Mount
Figure 1
Cut-out Drawing

© 2012 Pentair Technical Products 88026306 - 6 -
TECHNICAL INFORMATION
Sequence of Operation
The air conditioner comes standard with two internally mounted thermostats. There are two modes of operation;
heating and cooling. During heating and cooling modes the evaporator fan will be running.
Heating
When the enclosure temperature is below the heating thermostat setpoint, power is applied to the heaters.
When the enclosure temperature is 10 degrees above the setpoint the heater is powered o.
Cooling
When the enclosure temperature is above the cooling thermostat setpoint, power is applied through the
thermostat. The compressor is then energized either directly or through a contactor if unit requires one. The
condenser impellers will start immediately if the unit is not equipped with an optional head pressure control
switch. If the unit is equipped with an optional head pressure control switch, the condenser impellers will
start once the refrigerant pressure reaches the setting of the switch. Component specic information is listed
below.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties. DO NOT set the enclosure thermostat to a
temperature lower than 70 F. Doing so can increase the likelihood of frost buildup on the evaporator coil.
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 that the air conditioner must then dehumidify.
Standard and Optional Component Operation
Thermostat
The G28 air conditioner uses our standard 10-1061-16 thermostat. The thermostat setpoint equals the
temperature that the air conditioner turns o. The thermostat has a 10 F dierential from setpoint until it calls
for cooling or heating. An example of operation is shown below.
For cooling (75-100 F range):
• Thermostat setpoint = 80 F
• Cooling turns on at 90 F
• Cooling turns o at 80 F
For heating (55-65 F range):
• Thermostat setpoint = 55 F
• Heating turns on at 55 F
• Heating turns o at 65 F
NOTE: For testing purposes only, the thermostat stop screw may be removed (on units so
equipped) to allow settings below 70 F. After testing, replace the stop screw and verify that the
thermostat cannot be set below 70 F. Extended operation below 70 F can cause coil freeze ups
resulting in reduced load and/or unit damage.
Head Pressure Control (optional)
Unit is set at the factory, no adjustment necessary.
At a saturated condenser temperature of 82 F (170 psig), the condenser fans will power o. At a saturated
condenser temperature of 105 F (240 psig), the condenser fans will power on.
230V to 10V Transformer (optional)
This transformer powers the thermal display only.
230V to 24V Transformer and Relay (optional)
This transformer and relay are used to start/stop the unit thru a customer supplied, remote mounted door
switch.

© 2012 Pentair Technical Products88026306 - 7 -
Refrigerant Properties Chart (R 407c)
°F °C Bubble Point
(PSIG)
Dew Point
(PSIG) °F °C Bubble Point (PSIG)
Dew Point
(PSIG)
-40 -40 2.9 4.5 60 15.6 117.7 96.8
-35 -37.2 5.2 .7 65 18.3 128.7 106.7
-30 -34.4 7.9 1.7 70 21.1 140.2 117.2
-25 -31.7 10.7 4 75 23.9 152.5 128.4
-20 -28.9 13.9 6.5 80 26.7 165.5 140.4
-15 -26.1 17.3 9.3 85 29.4 179.2 153.1
-10 -23.3 21.1 12.4 90 32.2 193.6 166.5
-5 -20.6 25.2 15.8 95 35 208.8 180.8
0 -17.8 29.6 19.5 100 37.8 224.9 195.8
5 -15 34.4 23.6 105 40.6 241.8 211.8
10 -12.2 39.6 28 110 43.3 259.6 228.7
15 -9.4 45.2 32.7 115 46.1 278.2 246.5
20 -6.7 51.3 37.9 120 48.9 297.8 265.3
25 -3.9 57.8 43.6 125 51.7 318.3 285.2
30 -1.1 64.7 49.6 130 54.4 339.9 306.1
35 1.7 72.2 56.2 135 57.2 362.4 328.2
40 4.4 80.2 63.2 140 60 386 351.4
45 7.2 88.7 70.7 145 62.8 410.7 375.9
50 10 97.8 78.8 150 65.6 436.5 401.7
55 12.8 107.5 87.5
Refrigerant Properties Chart (R 134a)
°F °C Pressure
(PSIG) °F °C Pressure (PSIG)
-40 -40 -14.7 60 15.6 58
-35 -37.2 -12.3 65 18.3 64
-30 -34.4 -9.7 70 21.1 71.5
-25 -31.7 -6.8 75 23.9 78
-20 -28.9 -1 80 26.7 86.7
-15 -26.1 0 85 29.4 95
-10 -23.3 2 90 32.2 105
-5 -20.6 4 95 35 113.3
0 -17.8 7.5 100 37.8 125
5 -15 9 105 40.6 135
10 -12.2 12 110 43.3 146.7
15 -9.4 15 115 46.1 157.5
20 -6.7 18.5 120 48.9 170
25 -3.9 22 125 51.7 185
30 -1.1 26
35 1.7 30
40 4.4 35
45 7.2 40
50 10 45.5
55 12.8 51.5

© 2012 Pentair Technical Products 88026306 - 8 -
Functional Data
Unit Evaporator. Air
In(°F) Amps(A) Condenser Delta(°F)
Evaporator
Delta(°F)
G280416GXXX 65-80 6.1-8.9 16-24 11-23
80-100 6.4-9.4 18-31 11-25
G280426GXXX 65-80 2.5-3.9 25-33 19-29
80-100 2.9-4.6 27-38 23-33
G280616GXXX 65-80 5.6-7.4 24-33 24-33
80-100 6.4-9.1 27-38 27-37
G280626GXXX 65-80 2.5-3.9 25-33 19-29
80-100 2.9-4.6 27-38 23-33
4000 BTU Unit Characteristics
Model
G280416GXXX G280426GXXX
Dimensional Data
Height 28.55 / 725.2mm 28.55 / 725.2mm
Width 16.97 / 431.1mm 16.97 / 431.1mm
Depth 11.10 / 281.9mm 10.10 / 256.6mm
Unit Weight 82 lbs / 37 kg 84 lbs / 38 kg
Unit Protection Rating Type 12/4/4X/3R
Cooling Data
Refrigerant R134a R407C
Refrigerant Charge 11.5 oz. 20 oz.
Cooling Capacity at 95 F Enclosure 95 F Ambient (BTU/Hr./W) 2900 / 3050 4300/4600
Cooling Capacity at Max Conditions (BTU/Hr./W) 3750 / 3950 4600/4900
Maximum Ambient Temp 131 F / 55 C
Minimum Ambient Temp -40 F / -40 C
Enclosure Airow 151 / 183 CFM 189/221 CFM
External Airow 284 / 290 CFM 291/300 CFM
Condensate Management Hose discharge / Optional powered condensate evaporator
Heating Data
Capacity 1000 W 2000 W
Electrical Data
Rated Voltage (50/60 Hz) 115V 230V
Rated Frequency 50 / 60 Hz
Voltage Range +/- 10% of rated
Cooling Amps at Max Conditions 11.7 / 10.5 4.6/5.8
Heating Amps 16.3 9.2
Compressor RLA / LRA 8.2 / 40 2.6/17.7
Evaporator Fan RLA* .31 .48
Condenser Fan RLA* .93 .53

© 2012 Pentair Technical Products88026306 - 9 -
6000 BTU Unit Characteristics
Model
G280616GXXX G280626GXXX
Dimensional Data
Height 28.55 / 725.1 mm
Width 16.97 / 431.1mm
Depth 10.10 / 256.6mm
Unit Weight 84 lbs / 38 kg
Unit Protection Rating Type 12/4/4X/3R
Cooling Data
Refrigerant R407C
Refrigerant Charge 20 oz.
Cooling Capacity at 95 F Enclosure 95 F Ambient (BTU/Hr./W) 5600 / 6000
Cooling Capacity at Max Conditions (BTU/Hr./W) 6000 / 6400
Maximum Ambient Temp 131 F / 55 C
Minimum Ambient Temp -40 F / -40 C
Enclosure Airow 189 / 221 CFM
External Airow 291 / 300 CFM
Condensate Management Hose discharge / Optional powered
condensate evaporator
Heating Data
Capacity 2000W
Electrical Data
Rated Voltage (50/60 Hz) 115V 230V
Rated Frequency 50 / 60 Hz
Voltage Range +/- 10% of rated
Cooling Amps at Max Conditions 9.9 / 11.4 4.6/ 5.8
Heating Amps 18.2 9.2
Compressor RLA / LRA 5.4 / 36.2 2.6 / 17.7
Evaporator Fan RLA* .82 .48
Condenser Fan RLA* .93 .53

© 2012 Pentair Technical Products 88026306 - 10 -
Wire Diagrams and Schematics
4000 BTU 1-Phase Wire Diagram (actual unit options may vary)
89077284
THERMAL DISPLAY (OPTIONAL)
CAPACITOR
HEATING
THERMOSTAT
COOLING
THERMOSTAT
EVAPORATOR
FAN
CONDENSER
IMPELLER
LIMIT
SWITCHES
START CAPACITOR
HEAD PRESSURE
CONTROL
(OPTIONAL)
FOR HEAD PRESSURE CONTROL (HPC) OPTION, TAKE BLK20 OUT AND
CONNECT HPC LEADS TO WAGO #2 AND #7.
SUPPRESSOR
(OPTIONAL)
TO THERMAL
DISPLAY
TO CUSTOMER
SWITCH
MALFUNCTION
SWITCH
(OPTIONAL)
POWER
BLOCK
COMPRESSOR
HEATER
AUTOMATIC
MANUAL
RELAY
TRANSFORMER
DOOR SWITCH (OPTIONAL)
COMPRESSOR
HEATER OR
CONDENSATE
EVAPORATOR
(OPTIONAL)

© 2012 Pentair Technical Products88026306 - 11 -
6000 BTU 1-Phase Wire Diagram (actual unit options may vary)
89081439
THERMAL DISPLAY (OPTIONAL)
ENCLOSURE
AMBIENT
HEATING
THERMOSTAT
COOLING
THERMOSTAT
EVAPORATOR
IMPELLER #1
CONDENSER
IMPELLER #2
LIMIT
SWITCHES
RUN
CAPACITOR
START
CAPACITOR
START
RELAY
POWER
BLOCK
HEAD PRESSURE
CONTROL (OPTIONAL)
* FOR HEAD PRESSURE CONTROL (HPC) OPTION, TAKE BLK20
OUT AND CONNECT HPC LEADS TO WAGO #2 AND #7
SUPPRESSOR
(OPTIONAL)
TO THERMAL
DISPLAY
TO CUSTOMER
SWITCH
MALFUNCTION
SWITCH
(OPTIONAL)
COMPRESSOR
HEATER
OR
HEAD PRESSURE
CONTROL LEAD
RELAY
TRANSFORMER
DOOR SWITCH (OPTIONAL)
COMPRESSOR
HEATER OR
CONDENSATE
EVAPORATOR
(OPTIONAL)
OR HEAD PRESSURE
CONTROL LEAD

© 2012 Pentair Technical Products 88026306 - 12 -
4000 BTU 1-Phase Schematic
89074302
6000 BTU 1-Phase Schematic (actual unit options may vary)
052001196
CUSTOMER
SWITCH
SUPPRESSOR (OPTIONAL)
COMPRESSOR HEATER
(OPTIONAL)
THERMOSTAT COOLING
START RELAY
START CAPACITOR
EVAPORATOR FAN
COMPRESSOR AND
OVERLOAD
DOOR SWITCH TRANSFORMER
AND RELAY (OPTIONAL)
THERMOSTAT HEATING, LIMIT
SWITCHES AND HEATER
AMBIENT IMPELLER WITH HEAD
PRESSURE CONTROL (OPTIONAL)
TRANSFORMER WITH
TEMPERATURE DISPLAY
(OPTIONAL)
CUSTOMER
SWITCH
SUPPRESSOR (OPTIONAL)
COMPRESSOR (OPTIONAL)
THERMOSTAT COOLING
HARD START RELAY
RUN CAPACITOR
START CAPACITOR
EVAPORATOR
IMPELLER
COMPRESSOR
AND OVERLOAD
DOOR SWITCH
TRANSFORMER AND RELAY
(OPTIONAL)
THERMOSTAT HEATING, LIMIT
SWITCHES AND HEATER
AMBIENT IMPELLER WITH
HEAD PRESSURE CONTROL
(OPTIONAL)
TRANSFORMER WITH
TEMPERATURE DISPLAY
(OPTIONAL)

© 2012 Pentair Technical Products88026306 - 13 -
SERVICE DATA
Components List
Part Description Part Number
G280416GXXX G280426GXXX G280616GXXX G280626GXXX
Capacitor, Compressor, Start 85PS110C92 10-1032-08 10-1032-08 10-1032-08
Capacitor, Compressor, Run N/A S-6173 52-6032-06 S-6173
Capacitor, Condenser Impeller 52-6032-13 52-6032-14 52-6032-13 52-6032-14
Capacitor, Evaporator Impeller N/A 52-6032-14 52-6032-15 52-6032-14
Coil, Condenser 89075089 52-6032-14 89051206 52-6032-14
Coil, Evaporator 89075090 28-6010-00 28-6010-00 28-6010-00
Compressor 89069347 10-1026-123 10-1016-91 10-1026-123
Filter, Air, Reusable 10-1000-107 10-1000-107 10-1000-107 10-1000-107
Filter/Dryer 52-6028-00 52-6028-00 52-6028-00 52-6028-00
Impeller, Condenser 10-1091-123 10-1091-124 10-1091-123 10-1091-124
Impeller, Evaporator 12-1012-01 10-1091-122 10-1091-121 10-1091-122
Relay, Compressor Start N/A 10-1042-13 10-1042-06 10-1042-13
Thermal Expansion Valve N/A 89057143 89057143 89057143
Thermal Overload, Compressor MRT16AFN-69 MRA5742-114 10-1007-18 MRA5742-114
Thermostat, SPDT, 55-100F 10-1061-16 10-1061-16 10-1061-16 10-1061-16
Heater, 2000 Watt 10-1038-55 10-1038-54 10-1038-55 10-1038-54
Limit Switch (automatic) 10-1033-01 10-1033-01 10-1033-01 10-1033-01
Limit Switch (manual) 10-1033-07 10-1033-07 10-1033-07 10-1033-07
Malfunction Switch 89083014 89082840 89082840 89082840
Head Pressure Control Switch 89083016 89083015 89083015 89083015

© 2012 Pentair Technical Products 88026306 - 14 -
MAINTENANCE
Compressor
The compressor requires no maintenance. It is hermetically sealed, properly lubricated at the factory and should
provide years of satisfactory operating service.
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.
Inlet Air Filter
This air conditioner was designed with a dust resistant condenser coil. This allows it to be run lterless in most
applications. The air conditioner is shipped with a lter in place for your convenience. For lterless operation, simply
remove the lter. Should you decide the lter is necessary in your application, regular maintenance to clean this lter
will assure normal operation of the air conditioner. The easily removable inlet air lter is located behind the front
cover. If necessary lter 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 lter (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 lter 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 lter, thus causing a reduction in cooling air ow
across the surface of the compressor and condenser coil.
How To Remove, Clean or Install a New Inlet Air Filter
RP aluminum washable air lters are designed to provide excellent ltering eciency with a high dust holding
capacity and a minimum amount of resistance to air ow. Because they are constructed entirely of aluminum they are
lightweight and easy to service. To achieve maximum performance from your air handling equipment, air lters should
be cleaned on a regular basis.
The inlet air lter is located behind the front access cover. To access the lter, loosen the access-cover screw. Swing top
edge of access cover forward. Slide air lter up and out of retaining tabs. The lter may now be cleaned or new lter
installed.
Cleaning Instructions:
1. Flush the lter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS.
2. After ushing, allow lter to drain. Placing it with a corner down will assure complete drainage.

© 2012 Pentair Technical Products88026306 - 15 -
Condenser and Evaporator Air Movers
Impeller motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for the life of
the motor.
If one of the condenser impeller motors (ambient impellers) 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 removing the front cover.
Operation of the air conditioner in areas containing airborne
caustics or chemicals can rapidly deteriorate lters, condenser
coils, blowers and motors, etc. Contact Pentair Technical Products
for special recommendations.
CAUTION
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.
Should the refrigerant charge be lost, access ports on the suction and discharge sides of the compressor are provided
for recharging and/or checking suction and discharge pressures.
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.

© 2012 Pentair Technical Products 88026306 - 16 -
TROUBLE SHOOTING
Basic Air Conditioning Trouble Shooting Check List
1. Check manufacturer’s nameplate located on the unit for correct power supply.
2. Turn on power to the unit. The evaporator (Enclosure or “COLD” air) impeller should come on. Is there
airow?
YES, proceed to step 3.
NO, possible problem:
• Open motor winding
• Stuck impeller motor
• Obstructed wheel
Repair or Replace
defective part
3. Check thermostat setting and adjust thermostat to the lowest setting. This should turn the condenser
impellers and the compressor on. Did condenser impellers and compressor come on when the
thermostat was turned on?
YES, proceed to step 4.
NO, possible problem:
• Tripped customer door switch
• Defective thermostat Replace part
4. Are all impellers and the compressor running? If not the unit will not cool properly.
5. Check condenser (Ambient or “HOT” air) impellers for airow. Is there airow?
YES, proceed to step 6.
NO, possible problem:
• Defective thermostat
• Open motor winding
• Stuck impeller motor
• Obstructed wheel
Repair or Replace
defective part
6. Carefully check the compressor for operation - motor should cause slight vibration, and the outer case
of the compressor should be warm. Is the compressor showing signs of this?
YES, wait 5 minutes, then proceed to step 7.
NO, possible problem:
• Defective thermostat
• Defective overload
• Defective relay
Repair or Replace
defective part
7. Make sure the coils are clean. Then check evaporator “air in” and “air out” temperatures. If the
temperatures are the same:
• Possible loss of refrigerant
• Possible bad valves in the compressor
Repair or Replace
defective part
8. To check for a bad thermostat, turn power to the unit o. Remove the upper access panel and place
both thermostat wires onto one terminal (replace upper access panel for safety). This will activate
the switch in the thermostat. Turn the power on and if all impellers and the compressor come on, the
thermostat needs to be replaced.

© 2012 Pentair Technical Products88026306 - 17 -
Symptoms and Possible Causes:
SYMPTOM POSSIBLE CAUSE
Unit won’t cool
Clogged ns on coil(s)
Dirty lter
Impellers not running
Compressor not running
Compressor runs, but has bad valves
Loss of refrigerant
Compressor tries to start but won’t run
Low line voltage at start. Should be +/-10% rated voltage.
Compressor motor stuck
Bad contactor
Bad overload switch
Unit blows breakers Undersized breaker/fuse or not time delayed
Short in system
Getting water in enclosure
Drain plugged
Drain tube kinked
Enclosure not sealed (allowing humidity in)
Mounting gasket damaged
For additional technical support, contact Pentair Technical Products at 800-896-2665.

© 2012 Pentair Technical Products 88026306 - 18 -
WARRANTY
Pentair Technical Products warrants that the Goods manufactured by Pentair Technical Products will be free
from defects in material and workmanship for a period of one (1) year from the date of shipment by Pentair
Technical Products, subject to the following conditions and exclusions:
A. Conditions. All Goods must be installed and operated according to the following specications:
1. Maximum voltage variation no greater than plus or minus 10% of nameplate nominal rating;
2. Maximum frequency variation no greater than plus or minus 3 Hz. of nameplate nominal rating;
3. Must not exceed minimum and maximum stated temperatures on the nameplate;
4. Must not exceed (BTU/Hr) rating, including any heat sink as indicated on the nameplate;
5. Refrigerant bearing Goods must not be restarted for a period of one (1) minute after intentional or
accidental shut-o;
6. The lters (if applicable) must be cleaned regularly;
7. The Goods and any parts thereof must not be modied, unless prior written authorization is received
from Pentair Technical Products; and
8. All Goods must be installed and grounded in accordance with all relevant electrical and safety codes, as
well as the National Electric Code and OSHA rules and regulations.
9. All Goods must be installed in a stationery application, free of vibration.
A violation of any one of these conditions shall render the warranty hereunder void and of no eect.
B. Exclusions. This warranty shall be void if product is misapplied in any way or:
1. Buyer specied product is inappropriate for system or environment in which it is operating.
2. Pentair Technical Products product modied in any way without prior written authorization from
Pentair Technical Products.
3. Removal or modication of Pentair Technical Products label axed to product without written Pentair
Technical Products approval.
Pentair Technical Products must be notied of a claim in writing not later than fourteen (14) days from the
date when Buyer has become aware of such occurrence, or where the defect is such that it may cause damage,
immediately, such notice containing a description of how the defect manifests itself. Failure to provide such
prompt notice to Pentair Technical Products shall result in forfeiture of Buyer’s rights under this warranty.
In the event of a warranty claim, Buyer is to return defective goods to Pentair Technical Products in accordance
with Pentair Technical Products Return Policy. Warranty period for repaired goods remains at 1 year from
shipment of original goods. Pentair Technical Products sole obligation to Buyer under this warranty will be, at
Pentair Technical Products option:
A. Repair or replace Pentair Technical Products products or parts found to be defective in material or
workmanship.
B. Issue credit for the purchase price paid by Buyer relating to such defective Goods or part.
THIS WARRANTY CONSTITUTES THE ENTIRE WARRANTY WITH RESPECT TO THE GOODS AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY
AND IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
RETURN AND REPAIR POLICY
Pentair Technical Products products that: (i) are made to order, (ii) have been modied by Buyer, (ii) have
special nishes, or (iv) are determined by Pentair Technical Products to constitute “custom” products that
cannot be returned to stock or resold to other Buyers, will not be accepted for return by Pentair Technical
Products.
All returns require a Return Material Authorization number (RMA #), regardless of reason for return, whether
it be for warranty or out of warranty repair. Returns without an RMA # will be refused by our Receiving
Department. An RMA # is valid for 60 days.
A. An RMA # will be issued by our Repair Department in Anoka, MN at 866-545-5252. Buyer should have
following information available at time of RMA request:

© 2012 Pentair Technical Products88026306 - 19 -
1. Complete Model Number, Serial Number and description of damaged unit being returned.
2. Original Buyer Purchase Order number and date product was received by Buyer.
3. Quantity to be returned and a brief description of failure for each unit, if dierent.
4. Contact information of Buyer that must include: name of company, billing and shipping address,
phone, number, fax number, freight carrier and the name and phone number of a Buyer contact who
can elaborate on the claimed defect in detail.
5. Buyer must provide a Repair Purchase Order number for both warranty and out of warranty repairs. The
PO will not exceed 50% of a new unit. Buyer will be notied of repair charges that exceed approved PO
amount.
B. All returns to Pentair Technical Products must be securely packed, using original cartons if possible. All
returns must have the RMA number visible on the outside of the carton. Pentair Technical Products is not
responsible for material damaged in transit. Any refrigerant-bearing Goods must be shipped upright for
return.
C. Shipping cost for all non-warranty repairs is the responsibility of the sender and must be shipped prepaid.
Shipping costs for all warranty related repairs will be covered by Pentair Technical Products provided the
goods are returned using a Pentair Technical Products approved carrier. If after diagnoses the product is
determined by Pentair Technical Products not be covered under warranty, Buyer will be responsible for all
shipping charges and will be billed accordingly.
D. Non-warranty repairs are subject to a $75 minimum analysis fee. Analysis fee will be waived if Buyer
approves repair work. If approval is not received within 30 days, material will be scrapped and all shipping
expenses and corresponding analysis fees will be billed to Buyer.
E. At Buyer’s request, Failure Analysis can be provided by Pentair Technical Products for warrantable goods at
no charge. Failure analysis for non-warranty repairs are subject to a $100 per hour Engineering charge plus
any other incurred testing costs.
F. All returned merchandise must be sent to the following address: Pentair Technical Products, 2100 Homan
Way, Anoka, MN 55303-1745.
G. Credit for accepted returns shall be at the original selling price or the current selling price, whichever is
lower, less the restocking charge indicated as follows:
1. Within 60 days of invoice date - 20% of applicable selling price.
2. Within 61-120 days of invoice date - 30% of applicable selling price.
3. Within 121-180 days of invoice date - 40% of applicable selling price.
4. Beyond 180 days - subject to individual review by Pentair Technical Products.
If product being returned for credit requires repair or modication, the cost of any labor or material necessary
to bring product into saleable condition will be deducted from credit. Buyer may not take credit against
returns without prior written Pentair Technical Products approval.
LIMITATION OF LIABILITY
PENTAIR TECHNICAL PRODUCTS WILL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY LOST PROFITS OR
LABOR COSTS, ARISING FROM THE SALE, USE OR INSTALLATION OF THE GOODS, FROM THE GOODS BEING
INCORPORATED INTO OR BECOMING A COMPONENT OF ANOTHER PRODUCT, FROM ANY BREACH OF THIS
AGREEMENT OR FROM ANY OTHER CAUSE WHATSOEVER, WHETHER BASED ON WARRANTY (EXPRESSED
OR IMPLIED) OR OTHERWISE BASED ON CONTRACT, OR ON TORT OR OTHER THEORY OF LIABILITY, AND
REGARDLESS OF ANY ADVICE OR REPRESENTATIONS THAT MAY HAVE BEEN RENDERED BY PENTAIR TECHNICAL
PRODUCTS CONCERNING THE SALE, USE OR INSTALLATION OF THE GOODS

© 2012 Pentair Technical Products 88026306
Rev. G P/N 10-1008-233
Protecting Electronics.
Exceeding Expectations.™
Pentair Technical Products
2100 Homan Way
Anoka, MN 55303
[phone]
[phone]
www.McLeanCoolingTech.com