Service Manual
83
Installation and Maintenance
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
The length is equal
Improper expanding
leaning
damaged
surface
crack
uneven
thickness
Smooth surface
Downwards
Pipe
Shaper
Union pipe
Pipe
Expander
Hard
mold
Pipe
Pipe
Pipe cutter
Leaning
Uneven
Burr
Improper pipe expanding is the main cause of refrigerant leakage.Please
expand the pipe according to the following 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.
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.
● "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 - 12.70 (1/2”)
1.8
1.0
Ф16 - 15.88 (5/8”)
2.4
2.2
Appendix 3: Pipe Expanding Method
Note:
Note:
