Air Purging Of The Piping And Indoor Unit - Panasonic CS-C18CKR Service Manual

CAUTION
• • • • If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure:
• • • • If the leak stops when the piping connections are tightened further, continue working from step 3.
• • • • If the leak does not stop when the connections are retightened, repair the location of leak.
• • • • Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause
frostbite.

10.3.5. AIR PURGING OF THE PIPING AND INDOOR UNIT

1) Checking a gas leakage
1. Remove the service-port cap from the 3-way valves.
2. Connect the Manifold gauge set to the service port of
Liquid side 3-way valve.
3. Connect the Charging Cylinder to the Manifold gauge
set and open the valve of the Cylinder.
4. Open the low pressure side valve of the Manifold gauge
for approx. 10 seconds and then close.
5. Check gas-leakage of the connecting portion of pipings
with the gas-leak detector.
<For the left pipings>
1) Measure the pressure.
2) Keep it for 5-10 minutes
• • • • Ensure if the pressure indicated on the gauge is as same as that of measured at first time
2) Air purging
The air remaining in the Refrigeration cycle which contains
moisture may cause malfunction on the Compressor.
1. To purge the air, push the pin on the Gas side 3-way
valve for three seconds with a Hexagonal wrench and
set it free for one minute.
• • • • Repeat this for three times.
2. To balance the refrigerant, close the low pressure side
valve on the Manifold gauge and release refrigerant
from the piping through service port until the gauge
indicates 0.5 - 0.3 MPa.
3. Set both 3-way valves to open position with the
Hexagonal wrench for the unit operation.
49
CS-C18CKR CU-C18CKR / CS-C24CKR CU-C24CKR