Samsung MXJ-YA1509 Series Installation Manual page 13

(3) Brazing the branch pipes (3) Brazing the branch pipes
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3) Refrigerant pipe works (air tightness works) 3) Refrigerant pipe works (air tightness works)
(1) Entry of nitrogen (1) Entry of nitrogen
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(2) Finishing the end of the pipe (2) Finishing the end of the pipe
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(3) Pressure gauge attached (3) Pressure gauge attached
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Work Description Work Description
Brazing the Brazing the
branch pipe. branch pipe.
Work Work Description Description
Entry of nitrogen. Entry of nitrogen.
Inject nitrogen to Inject nitrogen to
the pipe to test the pipe to test
leakages. leakages.
Work Description Work Description
Wrap the end of Wrap the end of
the pipe before the pipe before
connecting the connecting the
equipment, so equipment, so
that nitrogen that nitrogen
won't escape. won't escape.
Work Work Description Description
st st
Mark the 1 Mark the 1 and and
nd nd
2 2 pressure to pressure to
see if it leaks. see if it leaks.
Things to to do Things do
- Nitrogen substituted - Nitrogen substituted
brazing works on the brazing works on the
branch pipe to prevent branch pipe to prevent
generation of foreign generation of foreign
substance/oxide substance/oxide
- Check for adequate - Check for adequate
pressure (0.01 to pressure (0.01 to
2 2
0.1kg/cm 0.1kg/cm ) )
Things to to do Things do
Inject nitrogen at the Inject nitrogen at the
proper pressure. proper pressure.
st st 2 2
1 1 : 10kg/cm : 10kg/cm
nd nd 2 2
2 2 : 41kg/cm : 41kg/cm
Things Things to to do do
Sufficient brazing on the Sufficient brazing on the
end of the pipe. end of the pipe.
Things Things to to do do
st st 2 2
1 1 : 10kg/cm : 10kg/cm
nd nd 2 2
2 2 : 28kg/cm : 28kg/cm look at the look at the
scale. scale.
13 13
Installation guide Installation guide
Check Check point point
Check the pressure and entry Check the pressure and entry
of nitrogen. of nitrogen.
Check Check point point
In the presence of the In the presence of the
manager, check air tightness. manager, check air tightness.
Fill out the check forms. Fill out the check forms.
Check point Check point
Visual inspection Visual inspection
Check Check point point
Check for leakages. Check for leakages.