Appendix 3: Pipe Flaring Method - York DHP30NWB21SDCP30NWB21SDHP36NWB21SDCP36NWB21S Service Manual

Service Manual

Appendix 3: Pipe Flaring Method

Note:
Improper pipe flaring is the main cause of refrigerant leakage. Please
flare 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 flare nut
● Remove the flare nut on the indoor connection pipe and outdoor valve; install
the flare nut on the pipe.
E:Flare the pipe
● Flare with 45° flaring tool
Note:
● "A" is different according to the diameter, please refer to the sheet below:
Outer diameter(inch)
Ф1/4
Ф3/8
Ф1/2
Ф5/8
F:Inspection
● Check the quality of flare tool. If there is any blemish, flare the
port again according to the steps above.
A(inch)
Max Min
2/39 1/36
1/16 1/51
1/14 1/51
5/53 2/23
Pipe
Pipe cutter
Leaning Uneven
Pipe
Shaper
Downwards
Union pipe
Pipe
Hard
mold
Expander
Pipe
Smooth surface
Improper flaring
leaning damaged
surface
The length is equal
Burr
crack uneven
thickness
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