REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - continued

TM 5-4120-386-14

5-l3. REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - Continued.

ACTION

REMARKS

LOCATION/ITEM

(1) To pressurize a system that

has some refrigerant

charge, for either leak

testing method:

( 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.

NOTE

If it is possible that the problem may

not be a leak and that you may not

have to replace a refrigeration system

component, refrigerant-22 may be

substituted for the nitrogen in the

following test. If nitrogen is used, you

will have to discharge, evacuate, and

recharge the system after this test is

completed.

( c ) Connect a nitrogen

pressure regulator and

nitrogen bottle to the

center hose

connection of the

charging manifold.

(d) Open the unit service

valves and the

charging manifold

valves.

( e ) Open the nitrogen

tank valve and

pressurize the system

to 300 PSIG (21.2

k g / c m2)

5-44