Instruction manual
© 2012 Pentair Technical Products
87976469
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TEMPERATURE CONTROL
The electromechanical thermostat is factory preset to 75°F/23°C. To change the temperature setting, remove the front
cover and screen. 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 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, 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 ttings) 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 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
Proper maintenance of the inlet air lter, located behind the front cover, will assure normal operation of the air
conditioner. If 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
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 lter has been cleaned or replaced.
It is recommended that power to the air conditioner be interrupted intentionally when abnormally high compressor
operating temperature causes automatic shutdown of the unit. The above described shutdown is symptomatic of
clogged or dirty lter, thus causing a reduction in cooling airow across the surface of the compressor and condenser
coil.
Do not run the air conditioner for extended periods of time with the lter removed. Particles of dust, lint, etc., can plug
the ns of the condenser coil which will give the same reaction as a plugged lter. The condenser coil is not visible
through the lter opening, so protect it with a lter.
Continued operation under the above conditions can and will damage and shorten compressor life. The air
conditioner is available with an easily removable inlet lter to facilitate necessary cleaning. There should be no reason
to neglect this necessary maintenance.