39
Pipe expanding method
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.
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please expand the
pipe according to the following steps:
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
1/4”
3/8”
1/2”
5/8”
Max
Min
0.051’’
0.027’’
0.062’’
0.039’’
0.070’’
0.039’’
0.094’’
0.086’’
A(mm)
F: Inspection
• Check the quality of expand
-
ing port. If there is any blemish,
expand the port again according
to the steps above.
pipe
pipe cutter
leaning
uneven
burr
downwards
pipe
shaper
union pipe
pipe
expander
hard
mold
pipe
the length is equal
improper expanding
leaning
damaged
surface
crack
uneven
thickness
smooth surface