Vacuum Drying - Samsung RD040MHXCA Series Installation Manual

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, 5mmHg, 0.0967psi).

Close the service valve of the liquid side pipe and gas side pipe completely.

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.
Perform vacuum drying for 2 hours and
30 minutes or more.
Close the valve after checking the vacuum
gauge pressure has reached at 5Torr
(0.0967psi).
Pressure Increase
Fill refrigeration agent
FJM RD040MHXCA_IM_00000_E_2.23.10.indd 21
Make sure that install check valve to prevent pump oil from
flowing into the pipe.
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.
Check the vacuum pressure using the vacuum gauge.
Yes
No
No
Low pressure side
Gas side pipe
Service port
Check for gas leakage
Since there is water in pipeline, the pressure
increases and vacuum condition is broken.
Exert pressure using 0.05Mpa (7.25psi)
nitrogen.
Vacuum desiccate again, to reach 5Torr
(666.6Pa, 5mmHg, 0.0967psi).
(2 hours and more)
Pressure Increase
I U
NSTALLING THE NIT
Manifold gauge
High pressure
side
Vacuum
pump
Liquid side pipe
Yes
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2010-2-24 19:57:32