REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - continued

TM 5-4120-386-14

5-13. REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - Continued.

LOCATION/ITEM

ACTION

REMARKS

( f ) Perform leak tests.

(g) If a leak is found,

discharge and purge the

system and repair leak.

See specific instructions

for components to be

removed.

(h) If a leak was not found and

refrigerant-22 was used to

pressurize the system, see

charging instructions.

(2) To pressurize a system that

has been discharged and purged

for leak testing with an

electronic detector:

( a ) Remove the hose

connection protective caps

from the high and low

pressure service valves.

(b) Connect the hoses from a

charging manifold to the

service valves.

( c ) Connect a cylinder of

refrigerant-22 to the

center hose connection of

the charging manifold.

CAUTION

Connect the refrigerant-22 cylinder so

that only gas will be used for

(d) Open both unit service

valves and the charging

manifold valves.

5-45