32
Pipe expanding method
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please expand
the pipe according to the following steps:
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the distance of indoor unit and
outdoor unit.
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pipe
pipe cutter
leaning uneven burr
B: Remove the burrs
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prevent the burrs from getting into
the pipe.
downwards
pipe
shaper
C: Put on suitable insulating pipe
D: Put on the union nut
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connection pipe and outdoor valve;
install the union nut on the pipe.
union pipe
pipe
E: Expand the port
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Note:
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diameter, please refer to the sheet
below:
expander
hard
mold
pipe
F: Inspection
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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)
$PP
Max Min
ĭ
ĭ
ĭ
ĭ
1.3 0.7
1.6 1.0
1.8 1.0
2.4 2.2