Pumping Down - Panasonic cs-pa7dkd Service Manual

10.2. Pumping down

(For Re-Installation)
(Indoor unit)
Closed
Procedure
1.Confirm that both 2-way and 3-way valves are set to open
positions.
Remove the valve stem cap and confirm that the valve
stems are in the open position.
Be sure using a hexagonal wrench to operate the valve
stems.
2.Operate the unit for 10-15 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
service port.
4.Air purging of the charge hose.
Open the low-pressure valve of the charge set slightly
to purge air from the charge hose.
5.Set the 2-way valve to the close position.
(Liquid side)
(Gas side)
High
Low
Closed
2-way
valve
Closed
3-way
valve
Open
6. Operate the air conditioner at the cooling cycle and stop it
when the gauge indicates 2
If the unit cannot be operated at the cooling mode
operation (weather is rather cold), short the Pumping
Down pins on the Main Control P.C.B.
7. Immediately set 3-way valve to the closed position.
Do this quickly so that the gauge ends up indicating
2
1 to 3 kg/cm G (0.1 to 0.3 Mpa).
8. Use refrigerant reclaiming equipment to collect refrigerant
from indoor unit and pipes.
9. Disconnect the charge set, and mount the 2-way and 3-way
valve stem s nuts and service port cap. '
Use torque wrench to tighten the service port cap to a
torque 1.8kgf.m (18N.m).
Be sure to check for gas leakage.
10. Disconnect pipes from indoor unit and outdoor unit.
.
51
CS-PA7DKD / CU-PA7DKD / CS-PC7DKD / CU-PC7DKD
(Outdoor unit)
2
kg/cm G (0.1Mpa).