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2. Flaring work and connection of piping
1) Flaring work
Main cause for gas leakage is due to defect in flaring
Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the fol-
lowing procedure.
1. Cut the pipes and the cable.
Use the piping kit accessory or pipes purchased
locally.
Measure the distance between the indoor and the
outdoor unit.
Cut the pipes a little longer than the measured dis-
tance.
Cut the cable 1.5m longer than the pipe length.
Copper
pipe
90°
2. Burrs removal
Completely remove all burrs from the cut cross sec-
tion of pipe/tube.
Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-
Point down
3. Putting nut on
Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed
burr removal.
Flare nut
Copper tube
Slanted Uneven Rough
Pipe
Reamer
4. Flaring work
Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Copper pipe
Clamp handle
Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
5. Check
Compare the flared work with figure below.
If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
Smooth all round
Inside is shiny without scratches
Even length
all round
-27-
Handle
Bar
Yoke
Red arrow mark
A
inch
mm
1/4
0~0.5
3/8
0~0.5
1/2
0~0.5
= Improper flaring =
Inclined
Surface
Cracked Uneven
damaged
thickness
Cone
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Troubleshooting
