Samsung SINGLE AF50MS3MCEENHC Technical Data Book page 43

13. Installation
AF50MS3MCEENHC+AF50MS3MCEEXHC, AF50MV3MCEENHC+AF50MV3MCEEXHC
Vacuuming, gas leak test and charging additional refrigerant
Air tightness test and vacuuming
Use Nitrogen gas for air tightness test as shown in the illustration.
Manifold gage
Low pressure side
1. Execute air tightness test with nitrogen gas at pressure over 0.2 MPa and below 4.1 MPa. If you apply pressure at over
4.1 MPa, pipes may get damaged. Therefore, apply pressure with pressure regulator and pay attention to the pressure
of the nitrogen.
2. After applying Nitrogen gas, check there's any change of pressure, using a pressure regulator.
3. Check for leakage at connection part and brazed part by using soap water.
4. When there's no leakage, open the manifold gage to discharge nitrogen and connect the vacuum pump to the
manifold gage.
5. Perform vacuuming for over 30 minutes by using vacuum pump so that pressure is below -0.1006 MPa on the pressure
regulator.
- Use a vacuum pump that is at least 140 ℓ/min in capacity and make sure that vacuuming timing must be
longer when piping gets longer.
- Pressure will not drop even after 5 minutes of vacuuming when there's moisture within the pipe. In this case,
execute nitrogen blowing again before executing vacuuming.
Before vacuuming
˚C
˚F
High pressure side
Vacuum
pump
Changes in pressure gage after 5 minutes of vacuuming
When there's moisture
˚C
˚F
When there is no moisture
˚C
˚F
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