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to a feeder tube entering the outdoor coil. Defrost timing
periods of 30,60 and 90 minutes may be selected
by connecting the circuit board jumper to 30, 60 and
90 respectively. Accumulation of time for the timing
period selected starts when the sensor contact closes
(approximately 31°F), and when the wall thermostat calls
for heat. At the end of the timing period, the unit’s defrost
cycle will be initiated provided the sensor contact remains
closed. When the sensor contact opens (approximately 75°
F), the defrost cycle is terminated and the timing period
is reset. If the defrost cycle is not terminated due to the
sensor temperature, a ten minute override interrupts the
unit’s defrost period.
The Self Contained Packaged Air Conditioner and Heat
Pump should operate for many years without excessive
service calls if the unit is installed properly. However it
is recommended that the owner inspect the unit before
a seasonal start up. The coils should be free of debris
so adequate airow is achieved. The return and supply
registers should be free of any obstructions. The lters
should be cleaned or replaced. These few steps will help
to keep the product up time to a maximum. The Service
section that follows should help in identifying problems if
the unit does not operate properly.
Every application may require a dierent frequency of
replacement of dirty lters. Filters must be replaced at least
every three (3) months during operating seasons.
Dirty lters are the most common cause of inadequate
heating or cooling performance. Filter inspection should be
made at least every two months; more often if necessary
because of local conditions and usage.
Dirty throwaway lters should be discarded and replaced
with a new, clean lter.
Disposable return air lters are supplied with this unit. See
the unit Specication Sheet or Technical Manual for the
correct size and part number. To remove the lters, remove
the lter access panel on return side of the unit.
Use a ne grade automotive wax on the cabinet nish to
maintain the nish’s original high luster. This is especially
important in installations with extended periods of direct
sunlight.
The coil with the outside air owing over it should be
inspected annually and cleaned as frequently as necessary
to keep the nned areas free of lint, hair and debris.
The supply fan motors, the condenser fan motors and
compressors are permanently lubricated.
Refer to the unit Parts Catalog for a list of functional parts.
Parts are available from your distributor.
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