Panasonic CS-A181KR Service Manual page 28

CS-A181KR
2 Pumping down
CLOSE
Refrigerant
Reclaiming
Equipment
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.
(Indoor unit)
(Liquid side)
(Gas side)
Lo Hi
CLOSE
3-way valve
Close
3-way valve
Open
(6) Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 0 kg/cm
(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.
– 27 –
(Outdoor unit)
2
G