Panasonic CS-A73KR Service Manual page 59

Gas releasing
(Servicing)
11.1. Evacuation of Installation
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE
INDOOR UNIT AND PIPES in the following procedure.
If air remain in the indoor unit and refrigeration pipes, it will affect the compressor, reduce to
cooling capacity, and could lead to a malfunction.
Procedure:
1. Connect a charging hose with a push pin to the Low side of a
charging set and the service port of a 3-way valve.
- Be sure to connect the end of the charging hose with the
push pin to the service port.
2. Connect the centre hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure
that the needle in the gauge moves from 0 MPa (0 cmHg) to -0.1
MPa (-76 cmHg). Then evacuate the air for approximately ten
minutes.
2-way Valve (Liquid Side)
Open
59
3-way Valve (Gas Side)
Open (Connected
manifold
Open