CONTROL MODULE. - Continued

TM5-4120-384-14

4-21. CONTROL MODULE. - Continued

(See

fig.

4-17.)

Test/Repair.

(1) See paragraphs

4-22

through

4-25

for

testing

individual components.

(2) Repairs are limited to replacement

individual

components and repair of wire connections.

Replace.

If the control module

damaged

beyond

repair,

replace with a new control module.

Installation.

(See

fig.

4-16.)

(1) Carefully work sensing bulb through junction

box

frame

and

into mounting clamp(s) behind return air louver.

(2)

Tighten

clamp

screw(s).

(3) Slip control module into the opening in junction box.

Take care not to crush or kink sensing bulb capillary line.

(4)

Tighten

control

module

mounting

screw.

(5)

Install

return

air

louver

and

secure

with

eight

screws.

(6)

Connect

power

source.

4-64

Change 2