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Section VIII. CONDENSER COIL, EVAPORATOR COIL, AND DRAINS
4-22. General
The condenser coil (fig. 1-3) and evaporator coil
require periodic cleaning to insure full air flow
through the coils and maximum heat transfer
during operation. The evaporator drain tubes (fig.
4-6), located under the evaporator coil in the
evaporator fan compartment, are connected to a
drain tube in the housing. The housing drain tube
terminates in the drain openings at the rear of the
housing. Drain tubes must be open to prevent
buildup of condensate under the evaporator coil.
4-23. Servicing Condenser Coil
a. Refer to paragraph 4-21 and remove rear
cover and condenser cover.
b. Clean the surface of the condenser coil with a
soft bristle brush. Blow dirt out from between the
fins with compressed air. Hold nozzle of air hose at
least 6 to 8 inches away from coil to avoid
dam aging the fins.
Warning: Do not use steam to clean coils.
c. During cleaning inspect coil for leaks or
damaged fins. If leaks or damage are evident,
report condition to direct support maintenance.
d. Refer to paragraph 4-21 and install rear cover
and condenser cover.
4-24. Servicing Evaporator Coil
a. Refer to paragraph 4-18 and remove
evaporator outlet louvers. Refer to paragraph 4-21
and remove front cover.
b. Clean the surface of the evaporator coil with a
soft bristle brush. Blow dirt out from between the
fins with compressed air. Hold nozzle of air hose at
least 6 to 8 inches away from coil to avoid
damaging the fins.
Warning: Do not use steam to clean coils.
c. During cleaning inspect coil for leaks or
dam aged fins. lf leaks or damage are evident,
report condition to direct support maintenance.
d. Refer to paragraph 4-18 and install outlet
louvers. Refer to paragraph 4-21 and install front
cover.
4-25. Evaporator Drain Tubing
a. Removal. Refer to figure 4-6 and remove six
hose clamps, tee, and three pieces of flexible tubing.
4-13
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