Pipe Expanding Method - Viking GWH12UB Owner's Manual

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
leaning
B: Remove the burrs
prevent the burrs from getting into
the pipe.
downwards
C: Put on suitable insulating pipe
connection pipe and outdoor valve;
install the union nut on the pipe.
union pipe
pipe
pipe cutter
uneven burr
pipe
shaper
E: Expand the port
diameter, please refer to the sheet
below:
Outer diameter
(mm)
F: Inspection
If there is any blemish, expand the
port again according to the steps
above.
smooth surface
the length is equal
3
hard
mold
expander
A(mm)
Max
1.3
1.6
1.8
2.4
improper expanding
damaged
leaning crack
surface
pipe
Min
0.7
1.0
1.0
2.2
uneven
thickness