Connecting Pipes To The Indoor Unit; Preparation Of Piping - LG LBNG3061YL Service Manual

6. Connecting Pipes to the Indoor Unit

• Preparation of Piping

Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
1) Cut the pipes and the cable.
n Use the accessory piping kit or the pipes purchased
locally.
n Measure the distance between the indoor and the out-
door unit.
n Cut the pipes a little longer than measured distance.
n Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
n Completely remove all burrs from the cut cross section
of pipe/tube.
n Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Putting nut on
n Remove flare nuts attached to indoor and outdoor units,
than put them on pipe/tube having completed burr
removal.
(Not possible to put them on after flaring work)
4) Flaring work
n Carry out flaring work using flaring tool as shown below.
Outside Diameter
1/4"
3/8"
1/2"
5/8"
3/4"
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
5) Check
n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared section
and do flaring work again.
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
"A"
0~0.5
0.5~0.8
0.5~0.8
0.8~1.0
1.0~1.3
- 19 -
Copper
Slanted Uneven Rough
tube
90°
Pipe
Point down
Flare nut
Copper tube
Bar
Bar
"A"
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches.
= Improper flaring =
Inclined Surface
damaged
Even length
all round
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
LGE Internal Use Only