11.3. Evacuation of Re-installation
WHEN REINSTALLING AN AIR CONDITIONER, BE SURE TOIf air remain in the indoor unit and refrigeration pipes, it will
EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPESaffect the compressor, reduce to cooling capacity, and could
in the following procedure.lead to a malfunction.
Procedure:
1. Connect a charging hose with a push pin to the Low ? BE SURE TO USE REFRIGERANT RECLAIMING
and High sides of a charging set and the service port ofEQUIPMENTWHILEDISCHARGINGTHE
the 3-way valve.REFRIGERANT.
? Be sure to connect the end of the charging hose with the ? Purge the air from charge setOs centre hose.
push pin to the service port. ? Be sure to check for gas leakage.
2. Connect the centre hose of the charging set to a
vacuum pump.
3. Turn on the power switch of the vacuum pump and
Caution
make sure that the needle in the gauge moves from 0If gauge needle does not move from 0 cmHg (0 MPA)
cmHg (0 MPa) to -76 cmHg (-0.1 MPa). Then evacuateto -76 cmHg (0.1 MPa) in step (3) above, take the
following measures:
the air for approximately 10 minutes.
If the leaks stop when the piping connections are
4. Close the valve of both Low side and High side of thetightened further, continue working from step 3.
charging set and turn off the vacuum pump. Make sure
If the leaks do not stop when the connections are
that the needle in the gauge does not move afterretightened, repair the location of the leak.
approximately 5 minutes.
BE SURE TO TAKE THIS PROCEDURE IN ORDER TO
AVOID REFRIGERANT GAS LEAKAGE.
7. Tighten the service port caps of both the 3-way valves
5. Disconnect the charging hose from the vacuum pump.
at a torque of 18 N.m with a torque wrench.
6. Charge the pipes and indoor unit with gas refrigerant
8. Remove the valve caps of both the 3-way valves.
from liquid (High) side 3-way valve service port and
Position both of the valves to Oopen� using a hexagonal
then discharge the refrigerant until gas (Low) side
2wrench (4 mm).
gauge needle indicates 3 kg/cm(0.3 MPa).
9. Mount the valve caps onto the 3-way valves. |