Samsung RD140PHXEA Installation Manual download pdf (Page 23)

E-23

ENGLISH

Installing the Refrigerant Pipe Work

(Continued)

Vacuum Drying

 Use the tools for R410A to prevent the inflow of foreign

substances and resist against the internal pressure.

 Use the vacuum pump with the check valve to prevent pump

oil from flowing backward while the vacuum pump is stopped.



Vacuum system to 5Torr ( 666.6Pa, 0.0067 kgf/cm², 5 mmHg ).

 Close the service valve of the liquid side pipe and gas side pipe

completely.

Pressure Increase

Connect the manifold gauge to the

liquid side pipe and gas side pipe.

Perform vacuum drying of the liquid

side pipe and gas side pipe using the

vacuum pump.

Make sure that install check valve to prevent pump oil from

flowing into the pipe.

Perform vacuum drying for 2 hours and

30 minutes or more.

The time of vacuum drying may differ depending on

the length of the pipe or outdoor temperature.

Perform vacuum drying for at least 2 hours and 30 minutes.

Close the valve after checking the vacuum

gauge pressure has reached at 5Torr.

Check the vacuum pressure using the vacuum gauge.

Fill refrigeration agent

Yes

Check for gas leakage

Since there is water in pipeline, the pressure

increases and vacuum condition is broken.

Exert pressure using 0.05 MPa nitrogen.

Vacuum desiccate again, to reach 5Torr

( 666.6Pa, 0.0067 kgf/cm², 5 mmHg ).

(2 hours and more)

Pressure Increase

Yes

Vacuum

pump

Liquid side pipe

Manifold gauge

High

pressure side

Low pressure side

Gas side

pipe

Service port

If pressure rises in an hour, water remains the pipe or there will be a leak.

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Samsung RD140PHXEA Installation Manual Page 23

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