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 TM 9-4120-430-14
0047 00
CAUTION
Connect the refrigerant-22 cylinder so that only gas will be used for pressurization.
d.
Open both unit service valves and the charging manifold valves.
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 gauges read 40-50 psi (2.8-3.5kg/cm2).
f.
Close the charging manifold valves and the refrigerant cylinder valve.
g.
Remove the refrigerant-22 cylinder from the center hose connection.
i.
Open the charging manifold valves and the nitrogen cylinder and regulator valve. Allow system pressure to
build up until gauges read 300 psig (21.2 kg/cm2).
j.
Perform leak tests, then discharge and purge the system, in accordance with WP 0044 00 and WP 0045 00
before performing 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 replacement of components before
the air conditioner is reassembled and the refrigeration system is evacuated and charged.
END OF WORK PACKAGE
0047 00-3/4 blank
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