Innova IGZF09NI-1, Руководство пользователя, Страница: 43 / 212

ENG
41
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
• Confim the pipe length according to the
distance of indoor unit and outdoor unit.
• Cut the required pipe with pipe cutter.
pipe
pipe cutter
leaning uneven burr
B: Remove the burrs
• Remove the burrs with shaper and prevent
the burrs from getting into the pipe.
pipe
shaper
downwards
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.
union pipe
pipe
E: Expand the port
• Expand the port with expander.
hard
mold
pipe
expander
Note:
• ”A” is different according to the diameter,
please refer to the sheet below:
Outer diameter
(mm)
A(mm)
Max Min
Ø6 - 6.35(1/4”) 1.3 0.7
Ø9.52(3/8”) 1.6 1.0
Ø12-12.7(1/2”) 1.8 1.0
Ø15.8-16(5/8”) 2.4 2.2
F: Inspection
• Check the quality of expanding port.
If there is any blemish, expand the port
again according to the steps above.
smooth surface
the length is equal
leaning damaged
surface
crack uneven
thickness
improper expanding