Panasonic CS-C9BKNG, Service Manual, Page: 44 / 81

2-way Valve (Liquid Side) 3-way Valve (Gas Side)
Gas releasing Open
(Servicing) Open Open (Connected
manifold
11.1. Air Purging of the Piping and Indoor Unit
11.1.1. Air purging (Installation)
Required tools: hexagonal wrench, adjustable wrench, torque wrenches, wrench to hold the
joints and gas leak detector. / The additional gas for air purging has been charged in the
outdoor unit. / However, if the flare connections have not been done correctly and there gas
leaks, a gas cylinder and the charge set will be needed.
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration
pipings, it will affect the compressor, reduce the cooling capacity, and could lead to a
malfunction.
Service port cap / Be sure, using a torque wrench to tighten the service port cap (after using the
service port), so that it prevents the gas leakage from the refrigeration cycle.
Procedure:
1. Recheck the piping connections.
2. Open the valve stem of the 2-way valve counter-clockwise
approximately 90°, wait 10 seconds, and then set it to closed
position.
- Be sure to use a hexagonal wrench to operate the valve stem.
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