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FLARING WORK AND CONNECTION OF PIPING
18
FLARING WORK AND CONNECTION OF
PIPING
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable
- Use the piping kit accessory or the pipes
purchased locally.
- Measure the distance between the indoor
and the outdoor unit.
- Cut the pipes a little longer than measured
distance.
- Cut the cable 1.5 m longer than the pipe
length.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
Putting nut on
- Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring
work)
Flaring work
- Carry out flaring work using flaring tool as
shown below.
A inch (mm)
Pipe diameter
Inch (mm)
Wing nut type
Ø 1/4 (Ø 6.35) 0.04~0.05(1.1~1.3)
Ø 3/8 (Ø 9.52) 0.06~0.07(1.5~1.7)
Ø 1/2 (Ø 12.7) 0.06~0.07(1.6~1.8)
Ø 5/8 (Ø 15.88) 0.06~0.07(1.6~1.8)
Ø 3/4 (Ø 19.05) 0.07~0.08(1.9~2.1)
Firmly hold copper pipe in a bar in the
dimension shown in the table below.
Copper
tube
Point down
Bar
Clutch type
Copper pipe
0~0.02
(0~0.5)
Slanted Uneven Rough
90˚
Pipe
Reamer
Flare nut
Copper tube
<Wing nut type>
"A"
<Clutch type>
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