RECEIVING THE AIR CONDITIONER ...............................................................................................................................................................................3
HANDLING AND TESTING THE AIR CONDITIONER ......................................................................................................................................................3
M13 Design Data ....................................................................................................................................................................................................................................5
M13 Schematic and Wire Diagram, 115/230 Volt 1000 BTU ...............................................................................................................................................................7
M17 Design Data ....................................................................................................................................................................................................................................8
M17 Schematic and Wire Diagram, 115 Volt 1800 BTU .....................................................................................................................................................................10
M17 Schematic and Wire Diagram, 230 Volt 1800 BTU .....................................................................................................................................................................10
M28 Design Data ..................................................................................................................................................................................................................................11
M28 Schematic and Wire Diagram, 115 Volt, 2200 BTU And 230 Volt 6000 BTU ..............................................................................................................................14
M28 Schematic and Wire Diagram, 230 Volt, 2200 BTU ....................................................................................................................................................................14
M28 Schematic and Wire Diagram, 115/230 Volt, 4000 BTU & 230 Volt 6000 BTU ...........................................................................................................................15
M28 Schematic and Wire Diagram, 115 Volt, 6000 BTU ....................................................................................................................................................................15
M33 Design Data ..................................................................................................................................................................................................................................16
M36 Design Data ..................................................................................................................................................................................................................................20
M36 Schematic and Wire Diagram, 115/230 Volt 6000 BTU .............................................................................................................................................................22
M52 Design Data ..................................................................................................................................................................................................................................23
M52 Schematic and Wire Diagram, 115 Volt 10000 and 12000 BTU .................................................................................................................................................. 26
M52 Schematic and Wire Diagram, 115/230 Volt 6000/8000 BTU and 230 Volt 10000/12000 BTU ..................................................................................................26
MHB11 Design Data ............................................................................................................................................................................................................................27
MHB11 Mounting Gasket and Cutout Dimensions .............................................................................................................................................................................28
MHB11 Components List ....................................................................................................................................................................................................................28
MHB11 Schematic and Wire Diagram, 115 Volt, 2200 BTU And 230 Volt 6000 BTU .........................................................................................................................29
MHB11 Schematic and Wire Diagram, 230 Volt, 2200 BTU ..............................................................................................................................................................30
MHB11 Schematic and Wire Diagram, 115/230 Volt, 4000 BTU & 230 Volt 6000 BTU ......................................................................................................................30
TEMPERATURE CONTROL ............................................................................................................................................................................................32
PRINCIPLES OF OPERATION ........................................................................................................................................................................................32
Inlet Air Filter .......................................................................................................................................................................................................................................32
How To Remove, Clean or Install a New Inlet Air Filter .....................................................................................................................................................................33
Condenser and Evaporator Air Movers ..............................................................................................................................................................................................33
Refrigerant Loss ..................................................................................................................................................................................................................................33
Basic Air Conditioning Trouble Shooting Check List .........................................................................................................................................................................34
Symptoms and Possible Causes: ........................................................................................................................................................................................................35
RETURN AND REPAIR POLICY .....................................................................................................................................................................................38
LIMITATION OF LIABILITY .............................................................................................................................................................................................39
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.
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 Equipment Protection -within 15 days of delivery. Save the carton and packing material and request an inspection. Then file 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 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 five (5) minutes before operating.
CAUTION
Do not 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. This will cause permanent damage to the air
conditioner and also voids the warranty.
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 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.
1. Inspect air conditioner. Verify functionality before mounting the air conditioner, seeHANDLING
AND 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. Allow unit to remain upright for a
minimum of five (5) minutes before starting. Caution: Air conditioner must be in upright position
during operation.
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.