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TM 5-4120-386-14
5-13. REFRIGERATION SYSTEM SERVICING - (LEAK TEST) - Continued.
LOCATION/ITEM
REMARKS
ACTION
(e) Open the
refrigerant
cylinder valve
slightly and adjust
as necessary to
prevent formation
of frost, and allow
system pressure to
build up until the
gages read 40-50
PSI (2.8-3.5
k g / c m2) .
( f ) Close the charging
manifold valves
and the refrigerant
cylinder valve.
( g ) Remove the
refrigerant-22
cylinder from the
center hose
connection.
( h ) Connect a nitrogen
regulator of dry
nitrogen to the
center hose
connection.
(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
k g / c m2) .
5-46

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