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Remove the gas and liquid
service port caps
Gas service port
<Low pressure>
Liquid service port
<High pressure>
Step 3.3 Evacuating the air
The outdoor unit is loaded with sufficient R-22
refrigerant. You should evacuate the air in the indoor
unit and in the pipe. If air remains in the refrigerant
pipes, it affects the compressor. It may cause reduction
of cooling capacity and malfunction. Use a vacuum
pump.
RC_DB68-06033A-01.indd 43
Control box
Remove the screw for the
control box cover
For connecting the
refrigerant pipes
Connect the gas and liquid
refrigerant pipes
CAUTION
• When installing, make sure there is no leakage. When
recovering the refrigerant, ground the compressor
first before removing the connection pipe. If the
refrigerant pipe is not properly connected and the
compressor works with the stop valve open, the pipe
inhales the air and it makes the pressure inside of
the refrigerant cycle abnormally high. It may cause
explosion and injury.
1 Leave the system in the standby mode.
WARNING
• Do not turn on the system! This is necessary for
better vacuum operation (full OPEN position of
Electronic Expansion Valve).
2 Connect the charging hose of the low pressure side
of manifold gauge to a gas service port as seen in the
picture.
3
Valve
15 minutes
4
(Backward flowing prevention)
Liquid service port <Low pressure>
5
Liquid service port <High pressure>
Vacuum
Pump
English
5/27/2016 5:16:29 PM
43
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