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GB
40
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 lenght accoding
to the distance of indoor unit and
outdoor unit.
• Cut the required pipe with pipe cutter.
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: Put on the union nut
• Remove the union nut on the indoor
connection pipe and outdoor valve;
install the union nut on the pipe.
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)
A(mm)
Max Min
ф6 - 6.35 (1/4”) 1.3 0.7
ф9.52 (3/8”) 1.6 1.0
ф12 - 12.7 (1/2”) 1.8 1.0
ф15.8 - 16 (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.
pipe
pipe
expander
pipe
hard
mold
pipe
union pipe
shaper
downwards
pipe cutter
90º leaning uneven
smooth surface
the lenght is equal
leaning damaged
surface
crack uneven
thickness
burr
improper expanding
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