Service Manual
Appendix 3: Pipe Expanding Method
/ j\ Note:
Im pro p e r pipe e x p a n d ing is th e m ain ca use o f re frig e ra n t le akage.P lease
expand th e pipe a ccording to the fo llo w in g steps:
A:Cut the pip
• Confirm the pipe length according to the distance of indoor unit and outdoor unit.
• Cut the required pipe with pipe cutter.
V
90“
C L
Pipe
X
Leaning
m m
Pipe cutter
X
Uneven E
\ /
LU
B:Remove the burrs
• Remove the burrs with shaper and prevent the burrs from getting into the pipe.
C:Put on suitable insulating pipe
D o w n w a r d s
P ip e
S h a p e r
D:Put on the union nut
• Remove the union nut on the indoor connection pipe and outdoor valve; install
the union nut on the pipe.
Union pipe
Pipe
E:Expand the port
• Expand the port with expander.
A Note:
• "A" is different according to the diameter, please refer to the sheet below:
Outer diameter(mm)
A(mm)
Max Min
0 6 - 6.35 (1/4") 1.3 0.7
09.52 (3/8”) 1.6 1.0
012 - 12.70 (1/2”) 1.8 1.0
016 - 15.88 (5/8”) 2.4 2.2
F:Inspection
• Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
Smooth surface
Improper expanding
The length is equal
Installation and Maintenance %
101
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