Pumping Down - Panasonic CS-VC70KE Service Manual

11.2. PUMPING DOWN

Procedure:
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.
· 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
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 2-way valve to the closed position.
6. Operate the air conditioner at the cooling cycle and
stop it when the gauge indicates 0 MPa (0 kg/cm G).
If the unit cannot be operated at the cooling condition
(weather is rather cool), press the TEST RUN button so
that the unit can be operated.
7. Immediately set the 3-way valve to the closed position.
· Do this quickly so that the gauge ends up indicating 0.1
MPa (1 kg/cm G) to 0.3 MPa (3 kg/cm G)
8. Use refrigerant reclaiming
refrigerant from indoor unit and pipes.
equipment to collect
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CS-VC70KE / CU-VC70KE / CS-VC90KE / CU-VC90KE / CS-VC120KE / CU-VC120KE
9. Disconnect the charge set, and mount the 2-way and 3-
way valves stem caps 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 out-door unit.