Panasonic cs-pa7dkd Service Manual page 54

CS-PA7DKD / CU-PA7DKD / CS-PC7DKD / CU-PC7DKD
10.5. Evacuation (Installation)
(No refrigerant in the refrigeration cycle)
(Indoor unit)
Vacuum Pump
Procedure
1. Connect the vacuum pump to the charge set's centre hose.
2. Evacuation for approximately 1 hour.
Confirm that the gauge needle has moved toward -76cmHg
(-0.1MPa) [vacuum of 4 mmHg or less].
3. Close the valve ( Low side ) on the charge set, turn off the
vacuum pump, and confirm that the gauge needle does not
move (approximately 5 minutes after turning off the vacuum
pump).
4. Disconnect the charge hose from the vacuum.
Vacuum oil
If the vacuum pump oil becomes dirty or depleted, replenish
as needed.
(Liquid side)
(Gas side)
Open
Low High
2-way
valve
3-way
valve
Closed
54
(Outdoor unit)
Open
Open