Step 3.3 Evacuating The Air - Samsung AR**HS Installation Manual

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-410A
refrigerant. Do not vent R-410A into atmosphere: it is a
fluorinated greenhouse gas, covered by Kyoto Protocol,
with a Global Warming Potential (GWP) = 2088. 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.
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.
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A3050_EU_Best model_IM_DB68-06152A-00_EN.indd 18
1
Control box
Remove the screw for the
2
control box cover
For connecting the
refrigerant pipes
Connect the gas and liquid
refrigerant pipes
3
4
5
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).
Connect the charging hose of the low pressure side
of manifold gauge to a gas service port as seen in the
picture.
3
15 minutes
Valve
4
Vacuum
Pump
(Backward flowing prevention)
Liquid service port <Low pressure>
5
Liquid service port <High pressure>
Open the valve of the low pressure side of manifold
gauge anticlockwise.
Evacuate the air in the connected pipes using the
vacuum pump for about 15 minutes.
• Make sure that pressure gauge shows -0.1 MPa
(-76 cmHg, 5 torr) after about 10 minutes. This
procedure is very important to avoid a gas leak.
• Close the valve of the low pressure side of
manifold gauge clockwise.
• Turn off the vacuum pump.
• Check for 2 minutes if there is any pressure
change.
• Remove the hose of the low pressure side of
manifold gauge.
Set a valve cork of liquid and gas service port to the
open position.
2016/4/20 14:10:24