101
Installation and Maintenance
Service Manual
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
Improper expanding
leaning
damaged
surface
crack uneven
thicknes
Expander
Hard
mold
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
● Conrm 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(inch)
A(inch)
Max Min
Ф0.24 - 0.25 (1/4") 0.05 0.03
Ф0.37 (3/8") 0.06 0.04
Ф0.47 - 0.50 (1/2") 0.07 0.04
Ф0.63 - 0.625 (5/8") 0.09 0.09
Appendix 3: Pipe Expanding Method
Note:
Note:
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