EVAPORATOR COIL REPLACEMENT

TM 9-4120-428-14

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DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

EVAPORATOR COIL REPLACEMENT

INITIAL SETUP:

Equipment Condition

Tools

Remove top, panel (WP 0061 00)

Refrigeration Unit Service Tool Kit, WP 0000 00, Item

Remove supply air louver (WP 0022 00)

Remove mist eliminator (WP 0024 00)

Gloves, WP 0000 0 0, Item 2

Remove dehydrator (WP 0075 00)

Materials/Parts

Purge refrigerant system (WP 0066 00)

Evaporator Coil

WARNING

When handling coils, wear gloves to avoid cuts and reduce fin damage on the coil.

REPLACEMENT

1. Remove two screws (1) that secure the solenoid valve (2).

2. De-braze the tube connections at the elbow (3) and expansion valve (4) (WP 0067 00). Take care that the expansion

valve is not damaged during de-brazing operations.

3. Remove two flat head screws (5) from the top that attach the coil (6) to the housing. Remove two flat head screws

(7) from the side and two screws (8), lock washers (9), and flat washers (10) that attach the mist eliminator holder

(11) and coil (6) to the housing.

4. Lift the mist eliminator holder (11) up and out of the unit.

5. Lift the evaporator coil (6) up and out of the unit.

6. Carefully position the evaporator coil (6) in the unit.

7. Position the mist eliminator holder (11) in the unit.

8. Secure the mist eliminator holder and the evaporator coil (6) to the housing with four flat head screws (5 and 7).

Secure the evaporator coil to the housing with two screws (8), lock washers (9), and flat washers (10) each. The four

holes in the mist eliminator holder should match the bottom four holes in the coil.

9. Align the tubing connections to the elbow (3) and expansion valve (4). Braze the joints (WP 0067 00). Take care

that the expansion valve is protected during the brazing operation.

10. Secure the solenoid valve (2) with two screws (1)

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