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 TM9-4120-423-14&P
Refrigerant R-22 Charging
HIGH PRESSURE
SERVICE VALVE (OPEN)
HIGH (DISCHARGE)
CHARGING
PRESSURE HOSE
MANIFOLD
VALVE
(OPEN)
VALVE
(CLOSED)
LOW (SUCTION)
PRESSURE HOSE
DRIER/FILTER
LOW PRESSURE
SERVICE VALVE
(CLOSED)
TYPICAL REFRIGERANT
R-22 DRUM IN
POSITION TO CHARGE
LIQUID
SCALE
NOTE
The system must be evacuated before charging. Use only Refrigerant-22 to charge the
unit.
1
Check that the hose from the low-pressure service valve is connected to the compound gage side
of the charging manifold. The hose from the high-pressure service valve should be connected to
the pressure gage side of the charging manifold.
2
Connect the center hose from the charging manifold to a well-charged drum of Refrigerant-22.
3
Loosen the hose connections to the two air conditioner service valves slightly.
4
Open the two charging manifold valves.
5
Open the Refrigerant-22 drum valve slightly to allow a small amount of Refrigerant R-22 to
purge air from the hoses. Tighten the hose connections at the air conditioner service valves.
0075 00-2
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