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Main cause of gas leakage is defect in flaring work.
Perform flaring work correctly in the following procedure.
1.Pipe cutting
Cut the copper pipe correctly with pipe cutter.
2.Burrs removal
Completely remove all burrs from the cut cross
section of the pipe.
Put the end of the copper pipe downward to
prevent burrs from dropping in the pipe.
3.Putting nut on
Remove flare nuts attached to indoor and
outdoor units,then put them on pipe having
completed burr removal.
(not possible to put them on after flaring work)
4.Flaring work
Perform flaring work using flaring tool as
shown in the right.
Firmly hold copper pipe in a die in the dimension shown in the table above.
5.Check
Compare the flared work with figure in the right.
If flare is noted to be defective,cut off the flared section and perform flaring work again.
Flaring work
Pipe diameter
6 mm
9.52 mm
A ( mm)
For imperial
2.0 to 2.5
3.0 to 3.5
For rigid
0.5
0.5
Copper pipe
Copper pipe
Spare reamer
Pipe cutter
Flare nut
Copper pipe
Copper pipe
Copper pipe
Flare nut
Flaring tool
A
Die
Die
Yonk
Too
much
Tilted
Sctatch
on flared
plane Cracked Uneven
Pad examples
Even length
all around
Smooth all around
Inside is shining without any scratches
Burr
Good
Tilted Uneven Burred
90
