Daikin R410A Split Series - Pipe Expanding Method

18
English
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
● Confirm the pipe length according to
the distance of indoor unit and
outdoor unit.
● Cut the required pipe with pipe cutter.
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.
pipe cutter
pipe
leaning uneven burr
pipe
shaper
downwards
union pipe
pipe
E: Expand the port
● Expand the port with expander.
Note:
● "A" is different according to the
diameter, please refer to the sheet
below:
F: Inspection
● Check the quality of expanding port.
If there is any blemish, expand the
port again according to the steps
above.
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
expander
hard
mold
pipe
smooth surface
the length is equal
improper expanding
leaning damaged
surface
crack uneven
thickness