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Installation Manual
5.9 Pipe expanding method
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
pipe cutter
uneven
leaning
burr
B: Remove the burrs
Remove the burrs with shaper and prevent the burrs from getting into the pipe.
pipe
shaper
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
E: Expand the port
Expand the port with expander.
expander
hard
mold
pipe
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.
smooth
surface
the length is equal
improper expanding
leaning
damaged
surface
crack
uneven
thickness
