Evaporator Coil - TM-5-4120-393-140256

TM 5-4120-393-14

5-21. Evaporator Coil

This task covers:

a. Removal

c. Installation

b. Replace

Initial setup.

Tools:

Tool kit, service, refrigeration unit NSN 5180-00-596-1474

Personnel: 2

Equipment condition:

1. Turn unit power off at power source. If there is a chance that it will be turned on, also disconnect power

cable to air conditioner.

2. Remove heater elements. See para 4-58.

3. Remove mist eliminator. See para 4-32.

4. Remove conditioned air filters. See para 4-30.

5. Remove right conditioned air inlet grille. See para 4-22.

General Safety Instructions:

WARNING

Disconnect input power to the air conditioner before performing any internal

maintenance. Voltages used can KILL. Shutting the unit off at the control panel

does not disconnect unit power.

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

coil.

NOTE

For inspection and cleaning of installed coil. See para 4-62.

REMOVAL

Discharge the refrigerant system per para 5-9.

Using a drill bit smaller than the rivet body, drill out the two rivets that secure the heater thermostat bracket.

Remove the heater thermostat (S3) and bracket. See para 4-57.

Using a screwdriver, remove the twelve screws (1) and washers (2) in the left hand (3) and right hand (4) channel

assembly and remove channels.

CAUTION

To prepare a joint on a valve for debrazing/brazing, disassemble the valve to the

extent possible, then wrap all but the joint with a wet rag to act as a heat sink.

Remove grommet (5) from outlet evaporator tube.

5-50