Outdoor unit
To indoor unit
Hexagonal wrench
Service port cap
3-way valve cap
(gas side)
3-way valve cap
(liquid side)
No leakage found
leakage found
leakage ceased
leakage ceased
leakage persists
15
8. Air Purging of the Piping and Indoor Unit
The air which contains moisture and which
remains in the Refrigeration cycle may cause a
malfunction on the compressor.
¤
Remove the caps from the 3-way(liquid side)
and 3-way(gas side) valves.
¤Ł
Remove the service-port cap from the 3-way
(gas side) valve.
¤Ø
To open the valve, turn the valve stem of
3-way (liquid side) valve counter-clockwise
approx. 90° and hold it there for ten seconds,
then close it.
¤Œ
Check a gas-leakage of the connecting
portion of the pipings.
¤º
To open 3-way(liquid side) valve
again, turn the valve stem
counter-clockwise until it stops.
¤
To purge the air, push the pin on the service port
of 3-way(gas side) valve for three seconds using
with a hexagonal wrench and set it free for one
minute.
• Repeat this three times.
Result
• Re-tighten the connecting portion with
torque wrenches.
