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AIR PURGE AND TEST OPERATION
1) Air Purge
Choose Purge method from the table.
Connective Pipe Length Air Purging Method
Additional amount of
refrigerant to be charged
less than 16.4 feet
Use vacuum pump
N/A
16.4 ~ 32.8 feet
Use vacuum pump
0.32 ounces per foot for each foot
beyond 16.4 feet (5 meters).
Make sure the R410A refrigerant added into air conditioner is liquid form.
When relocating the unit to another place, perform evacuation, with a
vacuum pump.
CAUTION IN HANDLING THE PACKED VALVE
Open the valve stem until it hits against the stopper. Do not try to open it further.
Securely tighten the valve stem cap with a spanner or the like.
Valve stem cap tightening torque.
Liquid pipe side O 1/4”
11.57 ft lbs
(160kgf.cm
Gas pipe side O 3/8”
21.7 ft lbs
(300kgf.cm)
Refrigerant Gas
Packed Valve
condensor
(outdoor)
unit
evaporator
(indoor) unit
B
A
Half union
Packed valve
Valve stem
Flare nut
Stopper
Cap
O 0.5 inches (>10000Btu/h)
O 0.38 inches (<9000Btu/h)
O 0.25 inches
C
D
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