Evacuation Of Re-Installation - Panasonic CS-VC70KE Service Manual

CS-VC70KE / CU-VC70KE / CS-VC90KE / CU-VC90KE / CS-VC120KE / CU-VC120KE

11.3. EVACUATION OF RE-INSTALLATION

WHEN RE-INSTALLING AN AIR CONDITIONER, BE SURE
TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND
PIPES in the following procedure.
Procedure:
1. Connect a charging hose with a push pin to the Low
side of a charging set and the service port of the 3-way
valve.
· Be sure to connect the end of the charging hose with the
push pin to the service port.
2. Connect the center hose of the charging set to a
vacuum pump adapter and a vacuum pump.
3. Turn on the power switch of the vacuum pump and
make sure that the needle in the gauge moves from 0
MPa (0 cmHg) to -0.1 MPa (-76 cmHg). Then evacuate
the air for approximately ten minutes.
4. Close the Low side valve of the charging set and turn
off the vacuum pump. Make sure that the needle in the
gauge does not move for approximately five minutes.
BE SURE TO TAKE THIS PROCEDURE IN ORDERTO
AVOID GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump.
6. Charge the pipes and indoor unit with gas refrigerant
from 3-way valve service port, and then discharge the
refrigerant until low side (gas side) gauge needle
indicates 0.3 MPa (3 kg/cm
7. Tighten the service port cap at a torque of 18 N m with
a torque wrench.
8. Remove the valve caps of the 2-way valve and the 3-
way valve. Position both of the valves to "open" using
a hexagonal wrench (4 mm).
).
If air remains in the indoor unit and refrigeration pipes, it will
affect the compressor, reduce the cooling capacity, and could
lead to a malfunction.
9. Mount valve caps onto the 2-way and 3-way valves.
· BE SURE TO USE REFRIGERANT RECLAIMING
EQUIPMENT
REFRIGERANT.
· Purge the air from charge set's centre hose.
· Be sure to check for gas leakage.
Caution
If gauge needle does not move from 0 MPa (0 cmHg) to -
0.1 MPa (-76 cmHg) in step (3) above, take the following
measures:
If the leaks stop when the piping connections are tightened
further, continue working from step (3).
If the leaks do not stop when the connections are
retightened, repair the location of the leak.
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WHILE DISCHARGING THE