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TM5-4120-387-14
a.
b.
c.
d.
e.
f.
g.
h.
i.
gage,
j.
Check that system was leak tested and has NO LEAKS. (See para 5-9.)
NOTE
In the event that the compressor was replaced as a result of
a burn out, check that compressor burn out procedures were
followed.
(See para 5-21.)
Check that new filter-drier was installed.
If not, install one.
Check that both service valves and charging manifold valves are closed.
Attach hose assemblies to service valves and charging manifold valves.
Attach center hose assembly to vacuum pump.
Start vacuum pump.
Open charging manifold valves.
Open both unit service valves.
Run the vacuum pump until at least 29 inches of mercury, measured on the
is reached.
NOTE
Inability to reach 29 inches of mercury may indicate either a
leak or a problem with the pump.
Continue running the pump for one more hour, while observing the gage. If
the gage needle moves back and forth, you have a leak which must be located and
corrected first.
k.
Close both unit service valves.
1.
Close charging manifold valves.
m.
Stop vacuum pump.
n.
Disconnect pump from center hose connection.
o.
Go to paragraph 5-11, charging the refrigeration system.
5-11. CHARGING THE REFRIGERATION SYSTEM
Supplies:
Dehydrator
Refrigerant -22 (Drum) (item 10, Appendix E)
5-16
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