EVAPORATOR COIL - TM-5-4110-234-140159

TM5-4110-234-14

TO 40R7-5-7-1

(4)

Leak test all newly connected fittings.

(5)

Evacuate and charge the system as directed in paragraphs 5-10 and 5-1 la.

(6)

Install the evaporator air housing and screen (See figure 4-12).

(7)

Close all access doors.

5-23.

EVAPORATOR COIL See figure 5-5 or5-6.

Removal.

(1) Pump the system down in accordance with paragraph 5-6.

(2)

Remove 12 screws and lock washers and remove the evaporator air housing and screen. (See fig. 4-

12.)

(3)

Loosen the sensing bulb clamps and remove the sensing bulbs. Tape them up and out of the way.

(4)

If the coil is to be replaced remove the sensing bulb mount and the baffle.

(5)

Connect a dry nitrogen source to the compressor suction service tee and loosen the flare nut to the

receiver outlet valve. Purge this section of tubing in accordance with paragraph 5-9.

(6)

Debraze the tubing at the suction header using the techniques of paragraph 5-12.

(7)

Disconnect the flare nut at the distributor and expansion valve connection.

(8)

Use gloves when handling coils to avoid cuts and to reduce the possibility of fin damage.

(9)

Support the evaporator coil and remove the screws and lock washers securing the coil.

(10) Remove the coil.

b. Repair. If serious damage or if a leak should be evident in any part of the coil, notify general support

maintenance.

Installation.

(1)

Secure the evaporator coil to its mounting flanges with screws and lock washers.

(2)

Connect the flare nut from the distributor to the expansion valve.

(3)

Braze the suction header connections. (See para 5-12.)

(4) Tighten the flare nut to the receiver outlet valve and remove the nitrogen source connection. Replace

the drier (see para 5-19).

(5)

Install the sensing bulb mount and the baffle if they were removed.

(6)

Slip the sensing bulb back in their clamps and tighten the clamps.

(7)

Leak test the coil, newly connected tubing and tubing connections in the area of the newly brazed joints

per paragraph 5-7.

(8)

Evacuate and charge the system as directed in paragraphs 5-10 and 5-11a.

5-24