1 10-1008-188 rev 5
TABLE OF CONTENTS
Receiving the Air Conditioner ..................................................................... 1
Handling and Testing the Air Conditioner................................................... 1
Installation................................................................................................... 2
Design Data, Model Drawing ...................................................................... 3
Components List......................................................................................... 4
Wire Diagrams ............................................................................................ 5
Principles of Operation ............................................................................... 6
Maintenance ............................................................................................... 6
Trouble Shooting ........................................................................................ 7
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 MAI
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
MAI -- within 15 days of delivery. Save the packing material and request an
inspection. Then file a claim with the delivering carrier.
MAI 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 wire unit 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 five (5) to ten (10) minutes.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes after
the condenser air blower starts.
The compressor is provided with automatic reset thermal overload protection. The switch operates when
the compressor overheats due to a clogged or dirty condenser coil 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.
