Samsung MXJ-YA1509 Series Installation Manual page 70

3. 3.
Guideline for each installation process Guideline for each installation process
4-8. Nitrogen Pressurization Test 4-8. Nitrogen Pressurization Test
1) Leakage test 1) Leakage test
Perform individual finishing of the liquid/gas pipe or connect the liquid/gas pipes for pinching and Perform individual finishing of the liquid/gas pipe or connect the liquid/gas pipes for pinching and
brazing. brazing.
Nitrogen pressurization, 4MPa Nitrogen pressurization, 4MPa
Maintains 4Mpa for 24 hours. If no leakage, then pressure down to 1MPa. Maintains 4Mpa for 24 hours. If no leakage, then pressure
Maintain 1Mpa until connecting the outdoor/indoor units. Prevent corrosion in the copper pipes. Maintain 1Mpa until connecting the outdoor/indoor units. Prevent corrosion in the c
No change No change in in the the gauge gauge for for 24 24 hours
Maintain a pressure of 10kgf/cm Maintain a pressure of 10kgf/cm
69 69
Air tightness test Air tightness test
hours 41kgf/cm 41kgf/cm
down to 1MPa.
2 2
(1Mpa) (1Mpa)
2 2
(4.1Mpa)pressure maintained (4.1Mpa)pressure maintained
opper pipes.