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.
Use the piping kit accessory or the pipes pur-
chased locally.
Measure the distance between the indoor and the
outdoor unit.
Cut the pipes a little longer than 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
section of pipe/tube.
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
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)
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
Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Copper pipe
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
Inside is shiny without scratches
Even length
all round
-29-
A
inch mm
1/4 0~0.5
0~0.5
3/8
1/2 0~0.5
Handle
Bar
Clamp handle
Red arrow mark
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
Yoke
Cone
thickness