16
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.
MAINTENANCE
WARNING
HIGH VOLTAGE!
Disconnect all power before
servicing or installing this unit.
Multiple power sources may be
present. Failure to do so may cause
property damage, personal injury or
death.
WARNING
To prevent personal injury or death due to
improper installation, adjustment, alteration,
service or maintenance, refer to this manual.
For additional assistance or information,
consult a qualified installer, servicer agency
or the gas supplier.
CAUTION
Sheet metal parts, screws, clips and similar
items inherently have sharp edges, and it
is necessary that the installer and service
personnel exercise caution.
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 airflow is achieved. The return and supply
registers should be free of any obstructions. The filters
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.
Filters
CAUTION
To prevent property damage due to fire and
loss of equipment efficiency or equipment
damage due to dust and lint build up on internal
parts, never operate unit without an air filter
installed in the return air system.
Every application may require a different frequency of
replacement of dirty filters. Filters must be replaced at least
every three (3) months during operating seasons.
Dirty filters 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 filters should be discarded and replaced
with a new, clean filter.
Disposable return air filters are supplied with this unit. See
the unit Specification Sheet or Technical Manual for the
correct size and part number. To remove the filters, remove
the filter access panel on return side of the unit.
Cabinet Finish Maintenance
Use a fine grade automotive wax on the cabinet finish to
maintain the finish’s original high luster. This is especially
important in installations with extended periods of direct
sunlight.
Clean Outside Coil (Qualified Servicer Only)
The coil with the outside air flowing over it should be
inspected annually and cleaned as frequently as necessary
to keep the finned areas free of lint, hair and debris.
Lubrication
The supply fan motors, the condenser fan motors and
compressors are permanently lubricated.
Functional Parts
Refer to the unit Parts Catalog for a list of functional parts.
Parts are available from your distributor.
