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1. Confirm that both the 2-way and 3-way valves are set to
the opened position.
•
Remove the valve stem caps and confirm that the valve
stems are in the opened position.
stems are in the opened position.
•
Be sure to use a hexagonal wrench to operate the valve
stems.
stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the
charge set to the service port of the 3-way valve.
•
Connect the charge hose with the push pin to the Gas
service port.
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.
to purge air from the charge hose.
5. Set the 2-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and
stop it when the gauge indicates 1 kg/cm
2
G (0.1 MPa).
7. Immediately set the 3-way valve to the closed position.
•
Do this quickly so that the gauge ends up indicating 3 to
5 kg/cm
5 kg/cm
2
G (0.3 to 0.5 MPa).
8. Disconnect the charge set, and mount the 2-way and 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 1.8 kg.m (18 N.m).
torque of 1.8 kg.m (18 N.m).
•
Be sure to check for gas leakage.
11.2.2. Pumping down (Re-installation)
Procedure:
57
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