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