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Service manual
13
7.4
Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will
affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it
prevents the gas leakage from the refrigeration cycle.
Procedure
Recheck the piping connections.
Open the valve stem of the 2-way valve
counterclockwise approximately 90’, wait 10
seconds, and then set it to closed position.
Be sure to use a hexagonal wrench to operate the
valve stem
Check for gas leakage.
Check the flare connection for gas leakage
Purge the air from the system.
Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s service
port.
Using the hexagonal wrench to press the valve
core pin, discharge for three seconds and then
wait for one minute.
Use torque wrench to tighten the service port cap
to a torque of 1.8 kg.m. (18n.m)
Set the 3-way valve to the opened position.
Mounted the valve stem nuts to the 2-way and
3-way valves.
Check for gas leakage.
At this time, especially check for gas leakage from
the 2-way and 3-way stem nuts, and from the
service port.
Caution:
If gas leakage is discovered in step (3) above,
take the following measures.
If the leaks stop when the piping connections are
tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak,
discharge all of the gas through the service port,
and then recharge with the specified amount of
gas from a gas cylinder.
Summary of Contents for 38 KCL012733
Page 1: ...Cover Service Manual AIR CONDITIONER Hi Wall Type 42 38 KCL018R33 42 38QCL018R33...
Page 10: ...Service manual 7 4 Refrigerant cycle diagram Cooling only Heat pump mode...
Page 12: ...Service manual 9 6 Wiring diagram Indoor 42KCL018R33 42QCL018R33...
Page 13: ...Service manual 10 Outdoor 38KCL018R33 38QCL018R33...
Page 41: ...Service manual 6 4 Refrigerant cycle diagram Cooling only Heat pump mode...
Page 43: ...Service manual 8 6 Wiring diagram Indoor 42KCL024R33 42QCL024R33...
Page 44: ...Service manual 9 42KCL030R33 42QCL030R33...
Page 45: ...Service manual 10 Outdoor 38KCL024R33 38KCL030R33...