3.5.1 Flaring work
Main cause for gas leakage is due to defect in flaring
work. Carry out correct flaring work in the following
procedure.
A. Cut the pipes and the cable.
1) Use the piping kit accessory or the pipes pur-
chased locally.
2) Measure the distance between the indoor and the
outdoor unit.
3) Cut the pipes a little longer than measured dis-
tance.
4) Cut the cable 1.5m longer than the pipe length.
B. Burrs removal
1) Completely remove all burrs from the cut cross
section of pipe/tube.
2) 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.
C 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)
D. Flaring work
• Carry out flaring work using flaring tool as shown
below.
Firmly hold copper pipe in a die in the dimension shown in
the table above.
E. Check
1) Compare the flared work with figure below.
2) If flare is noted to be defective, cut off the flared sec-
tion and do flaring work again.
Outside diameter A
mm
mm
inch
1/4
3/8
1/2
5/8
ø6.35
ø9.52
ø12.7
ø15.88
1.0~1.3
0.8~1.0
0.5~0.8
0.5~0.8
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