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TM5-4120-377-14
4-64. EVAPORATOR COIL CLEANING
Preliminary procdures:
1. Remove mist eliminator. (See para 4-35.)
2. Remove evaporator fan. (See para 4-62.)
TS4120-377-14/4-77
a. Inspection of installed coil
(1) Check to be sure that power
Figure 4-77. Evaporator Coil
is disconnected.
(2) Check for accumulated dirt. Clean if an accumulation of dirt is evident.
(3) Check fins for dents, bent edges, or any condition that would block or distort air flow. Straighten all
damaged fins with a plastic fin comb.
Compressed air used for cleaning purposes will not exceed 30 psi (2.1 kg/cm2).
Do not use steam to clean coil.
b. Cleaning. Clean coil with a soft bristle brush, vacuum cleaner and brush attachment, or use compressed
air at 30 psi or less from the inside of the unit to blow the dirt out. Take care to avoid fin damage. When using
compressed air, wear safety glasses or goggles. Dirt can be blown into your eyes.
c. Repair/Replacement. Should a leak or major damage be evident, refer to direct support maintenance.
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