Pipe Expanding Method - Friedrich MWM09Y1J Service Manual

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(inch)
Ф1/4
Ф3/8
Ф1/2
Ф5/8
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
Installation and Maintenance
A(inch)
Max Min
2/39 1/36
1/16 1/51
1/14 1/51
5/53 2/23
Pipe
Pipe cutter
Leaning Uneven
Pipe
Shaper
Downwards
Union pipe
Pipe
Hard
mold
Expander
Pipe
Smooth surface
Improper expanding
leaning damaged crack
surface
The length is equal
Burr
uneven
thickness