20 Room Air Conditioner
Maintenance and Service
Chassis
Drainage
Cabinet Front
Corrosion Resistant Models
Compressor / Fan Motor
The chassis must be cleaned every four months or more often as the atmospheric conditions
require. Use water and detergent to clean the basepan, center partition and coils. The use of harsh
cleaning 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 is okay to use
to clean the coils, but make sure to cover the control with a blanket or plastic bag to keep it dry.
Corrosion Resistant units operating in harsh atmospheric conditions must be removed from the
sleeve and cleaned every 3 months in the same manner as above.
The base pan may overflow due to high humidity.
To drain the excess water, remove the drain cap
from the back of the unit.
The compressor and fan motor are hermetically sealed, permanently lubricated, and require no
additional oiling.
The cabinet front and discharge air grille can be cleaned with a mild soap or detergent. Under no
circumstances should hydrocarbon 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 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.
Drain Cap
