set to the service port of the 3-way valve.
- Connect the charge hose with the push pin to the Gas side
service port.
4. Air purging of the charge hose.
- Open the low-pressure valve on the charge set slightly to
purge air from the charge hose.
5. Set the Liquid side 3-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and stop it when
the gauge indicates 0 kg/cm
2
G (0 MPa).
- If the unit cannot be operated at the cool condition (weather
is rather cool), press the Pump Down Switch on the Indoor
unit.
- So that the unit can be operated.
7. Immediately set the gas side 3-way valve to the close position.
- Do this quickly so that the gauge ends up indicating 1 to 3 kg/
cm
2
G (0.1 MPa to 0.3 MPa).
8. Use refrigerant reclaiming equipment to collect refrigerant from
indoor unit and pipes.
9. Disconnect the charge set, and mount both the 3-way valve’s
stem nuts and the service port caps.
- Use a torque wrench to tighten the service port cap to a
torque of 18 N.m.
- Be sure to check for gas leakage.
10. Disconnect pipes from indoor unit and outdoor unit.
11.3. Evacuation of Re-installation
WHEN REINSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE
INDOOR UNIT AND PIPES in the following procedure.
If air remain in the indoor unit and refrigeration pipes, it will affect the compressor, reduce to
cooling capacity, and could lead to a malfunction.
50
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