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143
R-410A SEALED SYSTEM REPAIR
Service Valves Appearance
2-way Valve (Liquid Side)
Shaft position
3-way Valve (Gas Side)
Shaft position Service port
Closed
Closed
(with cap)
Closed
(with valve cap)
Closed
(with valve cap)
Closed
(clockwise)
Closed
(with cap)
Open
(with valve cap)
Open
(with valve cap)
Closed
(clockwise)
gauge)
Open
Open Open
(counter-clockwise) (connected manifold
Open Open
(with charging
cylinder)
OpenOpen
Open
Open
(with charging
cylinder)
Open
OpenOpen
Works
Shipping
Air purging
(Installation)
Operation
Evacuation
Pumping down
(Transfering)
(Servicing)
Gas charging
(Servicing)
Pressure check
(Servicing)
Gas releasing
(Servicing)
1.
2.
3.
4.
5.
6.
Valve cap
Open position
Closed position
Pin
Service
port
Service
port cap
To outdoor unit
Flare nut
To
piping
connection
To outdoor unit
Hexagonal wrench (4mm)
Open position
Closed position
To
piping
connection
Flare nut
Open
(with charging cylinder)
Open
(with charging cylinder)
(clockwise)
Open
(with vacumm pump)
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