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Additional Drainage(Optional)
The base pan may overflow due to high humidity.
To drain the excess water, remove the drain cap
from the back of the unit. This should only be done
in situations where high humidity conditions occur
or heat pumps are operating at lower outdoor
ambient tmpratures.
Chassis
The chassis and refrigeration coils must be cleaned twice annually or more often if the atmospheric
conditions cause large amounts of dirt, debris or lint to be deposited. Use water and mild detergent
to clean the basepan, center partition and coils. The use of harshcleaning materials may cause a
deterioration of the coil fins or endplates.
Do not use a high pressure cleaner as it could cause severe damage to the PTAC fins and coils. A
hose if maybe to used to clean the coils provided the spray does not damage the fins of the
refrigeration coils. Cover the control assembly with plastic to prevent water damage by keeping it dry.
Corrosion Resistant units operating in harsh atmospheric conditions must be removed from
thesleeve and cleaned every 3 months in the same manner as above.
Compressor / Fan Motor
The compressor and fan motor are hermetically sealed, permanently lubricated, and require no
additional oiling.
Cabinet Front
The cabinet front and discharge air grille can be cleaned with a mild soap or detergent. Under no
circumstances should fuel or solvent based cleaners (e.g. acetone, benzene, naphtha, gasoline, etc.)
be used to clean the front or air grilles.
Use care when cleaning the control area. Do not use an excessively wet cleaning cloth.
Corrosion Resistant Models
Corrosion resistant models subjected to harsh seacoast environments must be removed from the
wall sleeve and completely flushed with clean water at least four times a year. The basepan, center
partition, condenser end plates, and the condenser itself should be sprayed with clean, fresh water.
Leaving the unit in the sleeve and simply spraying the outdoor grille is not sufficient.
Maintenance and Service
Drain Cap
Owner's Manual 19
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