Air Purge

Be sure that all valve cocks are closed.

The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will affect the compressor, reduce cooling capacity and could lead to a malfunction.

Use Vacuum Pump as shown at the figure.

1.Connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the flare nut.

2.Connect the charging hose of low pressure side of manifold gauge to the packed valve having a service port as shown at the figure.

3.Open the valve of the low pressure side of manifold gauge counter-clockwise.

4.Purge the air from the system using vacuum pump for about 30 minutes.

-Close the valve of the low pressure side of manifold gauge clockwise.

-Make sure that pressure gauge show -0.1MPa(-76cmHg) after about 30 minutes.

-This procedure is very important in order to avoid gas leak.

-Turn off the vacuum pump.

-Remove the hose of the low pressure side of manifold gauge.

5.Set valve cork of both liquid side and gas side of packed valve to the open position.

6.Mount the valve stem nuts and the service port cap to the valve, and tighten them at the torque of 183kgf•cm with a torque wrench.

7.Check for gas leakage.

-At this time, especially check for gas leakage from the 3-way valve’s stem nuts, and from the service port cap.

Gas

OUTDOOR UNIT

 

Indoor unit

pipe side

 

 

 

 

 

Liquid

 

 

D

C

 

 

Liquid

Gas

pipe side

A

 

 

pipe side

pipe side

 

B

 

3-way

3-way

 

 

 

 

Flare nut

 

valve

valve

 

Vacuum

B

A

 

Valve cock

Pump

Outdoor unit

 

Cap

 

 

 

 

Needle valve cap

 

 

 

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Samsung AP55Q0DNUMG manual Air Purge

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