TM 9-4120-378-14
5.7 REFRIGERATION SYSTEM SERVICING - (LEAK TEST).- Continued
Location/Item
Action
Remarks
(i) Open the charging manifold valves and
the nitrogen cylinder and regulator valve.
Allow system pressure to build up until
gages read 300 psig (21.2 kg/cm 2).
(j) Perform leak tests, then discharge and
purge the system, in accordance with
ing maintenance, or before evacuating
and charging the system, as appropriate.
(3) Final Leak Testing. Always perform a final
leak test after performing any repair or re-
placement of components before the air con-
ditioner is reassembled and the refrigeration
system is evacuated and charged.
5-21
