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10-1008-194 Rev. 2
TEMPERATURE CONTROL
The electromechanical thermostat is factory preset to 75
o
F/23
o
C. To change the temperature
setting, remove the nylon plug from the front 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 front cover, 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
