Evacuation Of Re-Installation - Panasonic CS-C18DKU Service Manual

CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU

11.3. Evacuation of Re-installation

WHEN REINSTALLING 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
and High 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 centre hose of the charging set to 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
cmHg (0 PSI) to -76 cmHg (-14.5 PSI). Then evacuate the
air for approximately 10 minutes.
4. Close the valve of both Low side and High side of the
charging set and turn off the vacuum pump. Make sure
that the needle in the gauge does not move after
approximately 5 minutes.
BE SURE TO TAKE THIS PROCEDURE IN ORDER TO
AVOID GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump.
6. Charge the pipes and indoor unit with gas refrigerant
from liquid (High) side 3-way valve service port, and
then discharge the refrigerant until gas (Low) side
gauge needle indicates 3 kg/cm
2
G (43.5 PSI ).
48
If air remain in the indoor unit and refrigeration pipes, it will
affect the compressor, reduce to cooling capacity, and could
lead to a malfunction.
7. Tighten the service port caps of both the 3-way valves
at a torque of 4.05 lbf with a torque wrench.
8. Remove the valve caps of both the 3-way valves.
Position both of the valves to "open" using a hexagonal
wrench (6/32 inch).
9. Mount the valve caps onto the 3-way valves.
• BE SURE TO USE REFRIGERANT RECLAIMING
EQUIPMENT WHILE
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 cmHg(0 PSI) to
-76 cmHg (14.5 PSI) 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.
DISCHARGING THE