1.
Confirm that both the 3-way valves are set to the open
position.
•
Remove the valve caps and confirm that the valve caps
are in the raised position.
•
Be sure to use a hexagonal wrench to operate the valve
stems.
2.
Operate the unit for 10 to 15 minutes.
3.
Stop operation and wait for 3 minutes, then connect the
manifold gauge to the service port of the 3-way valve as
shown above.
•
Connect the manifold gauge to the gas side service
port.
4.
Air purging of the charge hose.
•
Open the Low pressure side valve of manifold gauge
slightly to purge air from the charge hose.
5.
Set the liquid side (High side) 3-way valve to the close
position.
6.
Operate the air conditioner at the cooling cycle and
stop it when the gauge indicates 0.1 MPa.
•
If the unit cannot be operated at the cooling (weather is
rather cool), press the Pump Down switch on the Indoor
unit.
•
So that the unit can be operated.
7.
Immediately set the gas side (Low side) 3-way valve to
the close position.
•
Do this quickly so that the gauge ends up indicating 0.1
0.3 MPa.
8.
Disconnect the manifold gauge, and mount both the
3-way valve’s caps and the service port caps.
•
Use torque wrench to tighten the service port nut to a
torque of 18 N.m.
•
Be sure to check for gas leakage.
11.2.2. Pumping down
Procedure:
52
CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6
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