TM 9-4120-385-14
NOTE
Weatherstripping, the installation of storm doors, and windows, if
appropriate, and insulation of surfaces exposed to the outside is
recommended when operating in extremely high temperatures for
extended periods.
c.
CLEANING. Clean outside grilles, coils, filters, and mist eliminator more frequently.
2-7. OPERATION IN DUSTY OR SANDY AREAS
NOTE
Unit Preventive Maintenance Checks and Services (PMCS) should
be performed at daily intervals.
a. GENERAL. Dusty and sandy conditions can seriously reduce the efficiency of the air
conditioner by clogging the air filter, mist eliminator, and coils, This will cause a restriction in
the volume of airflow. Accumulation of dust or sand in the condenser coil and/or in the
compressor compartment may cause overheating of the refrigeration system. Dust or sand may
also clog the condensate trap and water drain lines.
CAUTION
Never operate the air conditioner without having the air filters in
place.
b. PROTECTION.
(1) Shield the air conditioner from dust as much as possible.
(2) Take advantage of any natural barriers which offer protection.
(3) Limit the amount of dusty or sandy outside air introduced through the fresh air
damper.
(4) Roll down and secure the fabric cover on the back of the cabinet durimg periods of
shutdown
c.
CLEANING.
(1) Keep the air conditioner as clean as possible.
(2) Pay particular attention to the outside grilles, condenser, filters, mist eliminator,
louvers, and electrical components.
(3) In extreme conditions, daily cleaning of condenser, filters, and outside grilles may
be necessary.
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