69
69
3.
3.
Guideline for each installation process
Guideline for each installation process
70
70
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.
Air tightness test
Air tightness test
Nitrogen pressurization, 4MPa
Nitrogen pressurization, 4MPa
No
No change
change in
in the
the gauge
gauge for
for 24
24 hours
hours
41kgf/cm
41kgf/cm
2
2
(4.1Mpa)pressure maintained
(4.1Mpa)pressure maintained
Maintains 4Mpa for 24 hours. If no leakage, then pressure
Maintains 4Mpa for 24 hours. If no leakage, then pressure down to 1MPa.
down to 1MPa.
Maintain 1Mpa until connecting the outdoor/indoor units. Prevent corrosion in the c
Maintain 1Mpa until connecting the outdoor/indoor units. Prevent corrosion in the copper pipes.
opper pipes.
Maintain a pressure of 10kgf/cm
Maintain a pressure of 10kgf/cm
2
2
(1Mpa)
(1Mpa)
Summary of Contents for MXJ-YA1509 Series
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Page 137: ...136 136 Installation guide Installation guide...
