Samsung AR18NVPXCWK/MG Evacuating the air, Cooling capacity and malfunction. Use a vacuum pump

Control box

Remove the screw for the control box cover

Remove the gas and liquid	For connecting the
service port caps	refrigerant pipes

Gas service port <Low pressure>

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.

1Leave 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).

2Connect the charging hose of the low pressure side of manifold gauge to a gas service port as seen in the picture.

Liquid service port	Connect the gas and liquid
<High pressure>	refrigerant pipes

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.

3

Valve

15 minutes

4

Vacuum

Pump

(Backward ￿owing prevention)

Liquid service port <Low pressure>

5

Liquid service port <High pressure>

Installation

English 49