Panasonic CS-C18BKP Service Manual page 46

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6
11.1.2. Pumping down
Procedure:
1. Confirm that both the 3-way valves are set to the open
position.
• Remove the valve stem caps and confirm that the valve
stems are in the open position.
• Be sure to use a hexagonal wrench to operate the valve
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
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
• 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
2
3 kg/cm G (0.1 MPa to 0.3 MPa)
8. Use refrigerant reclaiming
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.
46
2
G (0 MPa).
equipment to collect