Section IX: MAINTENANCE OF CONDENSER COIL, EVAPORATOR COIL AND DRAINS

TM 5-4120-352-14

damaged or loose gaskets and insulation. Inspect

c. Cleaning, Inspection and Repair. Clean, in-

canvas cover for torn condition and for damaged

spect and repair covers as follows:

fasteners.

(3) Straighten a bent metal cover, cement or

replace loose or damaged gaskets and insulation.

Dry cleaning solvent, P-D-680, used to

Replace cover if it will not form a satisfactory seal

clean parts, is potentially dangerous

after repair.

to personnel and property. Avoid re-

(4) Replace condenser cover if damaged.

peated and prolonged skin contact.

d. Installation. Refer to figure 4-5 and install

Do not use near open flame or exces-

cover as follows:

sive heat. Flash point of solvent is 100

(1) Install thermostatic switch bracket on

-138 F (38 -59 C).

center cover and secure with two screws. Install

(1) Brush off any loose dirt or goreign matter

center cover and six screws,

from gaskets and insulation. Wipe off tops of metal

(2) Install rear cover and seven scres. Install

parts with a cloth dipped in cleaning solvent (Fed.

condenser cover and three screws and lockwashers.

Spec. P-D-680). Wash dirt from condenser cover.

(3) Install access cover and four screws.

(2) Inspect metal covers for distortion and

(4) Install front cover and eight screws.

MAINTENANCE OF CONDENSER COIL, EVAPORATOR COIL AND

Section IX.

DRAINS

4-24. Servicing Evaporator Coil.

4-22. General.

a. Refer to paragraph 4-17 and remove evapo-

The condenser coil (fig. 1-3) and evaporator coil

rator outlet louver and mist eliminator. Refer to fig-

require periodic cleaning to insure full air flow

ure 4-5 and remove front cover.

through the coils and maximum heat transfer cluing

b. Clean the surface of the evaporator coil with a

operation. The evaporator drain tubes (fig. 4-6), lo-

soft bristle brush. Blow dirt out from between the

cated under the evaporated coil in the evaporator

fins with compressed air. Hold nozzle of air hose at

fan compartment, are connected to a drain tube in

least 6 to 8 inches away from coil to avoid damaging

the housing. The housing drain tube terminates in

the fins.

the drain openings at the rear of the housing. Drain

tubes must be open to prevent buildup of condens-

ates under the evaporator coil.

4-23. Servicing Condenser Coil.

a. Refer to figure 4-5 and remove rear cover and

condenser cover.

c. During cleaning, inspect coil for leaks or dam-

b. Clean the surface of the condenser coil with a

aged fins. If leaks or damage are evident, report

soft bristle brush, Blow dirt out from between the

conditions to direct support maintenance.

fins with compressed air. Hold nozzle of air hose at

d. Refer to paragraph 4-18 and install outlet lou-

least 6 to 8 inces away from coil to avoid damaging

ver. Refer to paragraph 4-21 and install front cover.

the fins.

4-25. Evaporator Drain Tubing.

a. Removal. Refer to figure 4-6 and remove six

Compressed air is not to exceed 15 psi.

hose clamps, tee, and three pieces of flexible tubing.

Do not use steam to clean coils.

b. Cleaning and Inspection. Clean and inspect

drain tubing as follows:

(1) Flush out tubing and clean out any accu-

c. During cleaning inspect coil for leaks or dam-

mulation of dirt or other foreign matter from tee.

aged fins. If leaks or damage are evident, report

Use a small diameter brush or a piece of soft wire to

condition to direct support maintenance.

clean drain tube in housing.

d. Refer to figure 4-5 and install rear cover and

condenser cover.

4-16