LG LS-J0910CL Service Manual page 26

(3) Flaring work and connection
of piping
1) Flaring work
Main cause for gas leakage is due to defect in flaring
work. Carry out correct flaring work in the following pro-
cedure.
1. Cut the pipes and the cable.
Use the piping kit accessory or the pipes purchased
locally.
Measure the distance between the indoor and the out-
door unit.
Cut the pipes a little longer than measured distance.
Cut the cable 1.5m(4.9ft) longer than the pipe length.
Copper
pipe
90°
2. 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.
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. (not possible to put them on after flaring work)
Copper tube
Slanted Uneven Rough
Pipe
Reamer
Flare nut
4. Flaring work
Carry out flaring work using flaring tool as shown below.
Outside diameter
mm
ø6.35
ø9.52
ø12.7
ø15.88
Firmly hold copper pipe in a die in the dimension shown in
the table above.
Bar
Copper pipe
Clamp handle
5. Check
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
Even length
all round
- 26 -
inch
1/4
3/8
1/2
5/8
Handle
Bar
Red arrow mark
Inside is shiny without scratches
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
A
mm
0~0.5
0~0.5
0~0.5
0~1.0
Yoke
Cone
thickness