Johnson Controls DCX18CSB21S, Service Manual

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Service Manual
F:Inspection
● Check the quality of
flaring port. If there is any blemish, flare the
port again according to the steps above.
The length is equal
Improper expanding
leaning damaged
surface
crack uneven
thickness
Smooth surface
Downwards
Pipe
Shaper
Union pipe
Pipe
Expander
Hard
mold
Pipe
Pipe
Pipe cutter
Leaning Uneven Burr
Note:
Improper pipe flaring is the main cause of refrigerant leakage.Please
expand the pipe according to the following steps:
A:Cut the pip e
● 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.
E: Flare the pipe
● Flare the pipe with expander.
● "A" is different according to the diameter, please refer to the sheet below:
Outer diameter(inch)
A(inch)
Max Min
Ф1/4 2/39 1/36
Ф3/8 1/16 1/51
Ф1/2 1/14 1/51
Ф5/8 5/53 2/23
Appendix 3: Pipe Flaring Method
Note: