38
Pipe expanding method
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please expand
the pipe according to the following steps:
A: Cut the pipe
the distance of indoor unit and
outdoor unit.
pipe
pipe cutter
leaning
uneven
burr
B: Remove the burrs
prevent the burrs from getting into
the pipe.
downwards
pipe
shaper
C: Put on suitable insulating pipe
D: Put on the union nut
connection pipe and outdoor valve;
install the union nut on the pipe.
union pipe
pipe
E: Expand the port
Note:
diameter, please refer to the sheet
below:
expander
hard
mold
pipe
F: Inspection
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
Outer diameter
(mm)
A(mm)
Max
Min
Φ6 - 6.35(1/4")
1.3
0.7
1.6
1.0
1.8
1.0
2.4
2.2
