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Pipe expanding method
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please expand
the pipe according to the following steps:
A: Cut the pipe
● Confirm the pipe length according to
the distance of indoor unit and
outdoor unit.
● Cut the required pipe with pipe cutter.
pipe
leaning
B: Remove the burrs
● Remove the burrs with shaper and
prevent the burrs from getting into
the pipe.
downwards
C: Put on suitable insulating pipe
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
pipe cutter
uneven
burr
pipe
shaper
E: Expand the port
● Expand the port with expander.
Note:
● "A" is different according to the
diameter, please refer to the sheet
below:
Outer diameter
(mm)
Φ6 - 6.35(1/4")
Φ9.52(3/8")
Φ12-12.7(1/2")
Φ15.8-16(5/8")
F: Inspection
● Check the quality of expanding port.
If there is any blemish, expand the
port again according to the steps
above.
smooth surface
the length is equal
30
hard
mold
expander
A(mm)
Max
1.3
1.6
1.8
2.4
improper expanding
leaning
damaged
crack
surface
pipe
Min
0.7
1.0
1.0
2.2
uneven
thickness
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