6 10-1008-214 rev 1
TEMPERATURE CONTROL
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 shutdown 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.
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 that 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 front grille, 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 cutout 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 has been cleaned or replaced.
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