Flaring Work And Connection Of Piping - LG LS-J0761NL Service Manual

2. Flaring work and connection of piping

1) Flaring work
Main cause for gas leakage is due to defect in flar-
ing work. Carry out correct flaring work in the fol-
lowing procedure.
1. Cut the pipes and the cable.
I Use the piping kit accessory or the pipes pur-
chased locally.
I Measure the distance between the indoor and the
outdoor unit.
I Cut the pipes a little longer than measured dis-
tance.
I Cut the cable 1.5m longer than the pipe length.
Copper
pipe
90°
2. Burrs removal
I Completely remove all burrs from the cut cross
section of pipe/tube.
I Put the end of the copper tube/pipe in a down-
ward direction as you remove burrs in order to
avoid dropping burrs into the tubing.
Point down
3. Putting nut on
I Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having complet-
ed burr removal.
(not possible to put them on after flaring work)
Flare nut
Copper tube
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Slanted Uneven Rough
Pipe
Reamer
- 29 -
4. Flaring work
I 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
Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Bar
Copper pipe
Clamp handle
5. Check
I Compare the flared work with figure below.
I 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
mm
0~0.5
0~0.5
0~0.5
Handle
Yoke
Cone
Red arrow mark
= Improper flaring =
Surface Cracked Uneven
damaged thickness
LGE Internal Use Only