(Re-installation)
1. Remove the cap nut from 3-way valves.
• Remove the cap nut from 3-way valves after carefully
checked whether the piping connection was properly
and certainly done.
2. Confirm that the valve in both 3-way valves are set to
the CLOSED position.
3. Connect the gas cylinder to the liquid-side (high-
pressure) 3-way valve and the charge set to the gas
side (low-pressure) 3-way valve.
• Remove the flare nut from the service port to connect
the charge set and gas cylinder.
• Close the valves on the gas cylinder and charge set.
4. Air purging.
• Open the valve on the gas cylinder.
• Open the valve on the charge set, discharge for three
seconds and wait for one minute. Repeat this three
times.
5. Check for gas leakage.
• Check the flare connections for gas leakage.
6. Discharge the refrigerant.
• Close the valve on the gas cylinder and discharge the
refrigerant until the gauge indicates 3 to 5 kg/cm
2
G.
7. Disconnect the charge set and the gas cylinder.
8. Mount the valve stem cap nuts and the flare nuts for
service port onto the 3-way valves.
9. Mount the cap nut and service port nut onto the 3-way
valves.
• Be sure to use a torque wrench (CWHAD-9211) to
tighten the service port nut.
• Be sure to check for gas leakage.
11.2.1. Re-air purging
Procedure:
50
CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH
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