Flaring Work And Connection Of Piping - LG LS-K1820CL 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 follow-
ing 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 out-
door 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
- 32 -
inch
1/4
3/8
1/2
5/8
Handle
Bar
Yoke
Cone
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
thickness