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Page Title:
REFRIGERATION SYSTEM SERVICING - (CHARGING). - continued |
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 TM 5-4120-386-14
REMARKS
LOCATION/ITEM
ACTION
c.
Loosen the hose connections
to the two service valves
slightly.
d. Open the two charging manifold
valves.
e. Open the refrigerant-22
or charging cylinder valve
slightly to allow a small
amount of refrigerant to
purge air from the hoses.
Tighten the hose connections
at the air conditioner
service valve.
f.
Close the low pressure (suction)
charging manifold valve.
g. Position the refrigerant-22
cylinder so that liquid will
be used for charging. (Some
cylinders must be inverted
and some are equipped with a
selection valve.)
h. Using accurate scales, mea-
sure and record the weight
of the charged refrigerant-
22 cylinder.
i.
Fully open the refrigerant-22
cylinder valve.
Open the high pressure service
j.
valve on the air conditioner.
Allow liquid refrigerant to
enter the system until the
charged refrigerant cylinder
weight has decreased by 2.3
pounds (1.04 kg) or until
system pressure has equalized.
k. Close the refrigerant cylinder
valve and the high pressure
(discharge) manifold valve.
l.
Connect power to air conditioner.
m. Press and release both pressure
switch reset buttons.
n. Turn air conditioner on and
operate in the COOL mode with
the temperature control thermo-
stat set at a maximum COOLER
position.
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