11.3. Evacuation of Re-installation
WHEN REINS TALLING 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 hosewith apush 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 set?s 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 switchof 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). Thenevacuateto -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 thevalve ofboth Low side and High side of the
tightened 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 capsof both the3-wayvalves
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 indoorunit with gas refrigerant
8. Remove the valve caps of both the 3-way valves.
from liquid (High) side 3-wayvalve service port and
Position both of thevalves toOopen� using a hexagonal
then discharge the refrigerant until gas (Low) side
wrench (4 mm).
2
gauge needle indicates 3 kg/cm(0.3 MPa).
9. Mount thevalve caps ontothe 3-way valves. |