Service Valves.

TM 5-4120-352-14

5 - 2 3 . Pressure Relief Valve.

b. Installation. Install high and low pressure

a. Removal. Refer to figure 6-1 and discharge

cutout switches as follows:

the refrigerant system. Refer to figure 4-5 and re-

(1) Insert capillary tube ends through par-

move housing top covers. Remove screw, lock-

tition and install grommet (fig. 5-7). Connect capil-

washer, and loop clamp (fig. 5-7). Remove pressure

lary tube nuts to fittings.

relief valve from adapter.

(2) Install switches (fig. 4-20) and secure each

b. Installation. Install pressure relief valve

with two screws and lock washers.

(fig. 5-7) in adapter. Install loop clamp on valve and

(3) Make electrical connections to switches.

secure clamp with screw and lockwasher. Install

(4) Refer to paragraph 4-43 and install junc-

housing top cover (fig. 4-5). Refer to paragraph 6-3

tion box. Refer to paragraph 4-21 and install hous-

and charge the refrigerant system.

ing top cover.

(5) Refer to figure 6-2 and charge the refrig-

erant system.

5-24. Dehydrator.

a. General. The dehydrator is to be replaced

whenever the refrigeration system is opened for

5-22. Service Valves.

maintenance.

a. Removal Refer to figure 6-1 and discharge

b. Removal. Refer to figure 6-1 and discharge

the refrigerant system. Remove housing rear top

the refrigerant system. Refer to figure 4-5 and re-

covers (figures 4-5). Detach valve cap chain by re-

move housing rear top cover. Refer to figure 5-8 and

moving a screw, lockwasher and flat washers. Re-

remove four screws and two straps. Disconnect and

move valve by removing two base mounting screws.

remove dehydrator.

b. Installation. Mount valve to bracket, using

c. Installation. Connect dehydrator to tubing.

two screws. Affix loops in cap chains to housing

Install two straps and four screws. Use sealing com-

with a screw, lockwasher and two flat washers. Con-

pound on screw threads. Install rear top cover (fig-

nect valves to refrigerant lines by tightening flare

ure 4-5). Refer to figure 6-2 and charge the refrig-

nuts. Refer to figure 4-5 and install housing rear top

erant system.

cover. Refer to figure 6-2 and charge the refrigerant

system.

5-18