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INSTALLATION
10
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
A
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 1500mm longer than the pipe
length.
Copper
pipe
90°
Burrs removal
B
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.
Point down
Putting nut on
C
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)
Flare nut
Copper tube
Slanted Uneven Rough
Pipe
Reamer
Flaring work
D
Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
inch
ø6.35
1/4"
ø9.52
3/8"
ø12.7
1/2"
ø15.88
5/8"
ø19.05
3/4"
Firmly hold copper pipe in a die in the
dimension shown in the table above.
Bar
Bar
Copper pipe
Clamp handle
Check
E
Compare the flared work with figure below.
If flare is noted to be defective, cut off the flared
section and do flaring work again.
Smooth all round
Inside is shiny without scratches.
Inclined
Even length
all round
A
Thickness
mm
mm
1.1~1.3
0.7
1.5~1.7
0.8
1.6~1.8
0.8
1.6~1.8
1.0
1.9~2.1
1.0
Handle
Yoke
Cone
Red arrow mark
= Improper flaring =
Surface
Cracked Uneven
damaged
thickness
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