Connecting Pipes To The Indoor Unit; Preparation Of Piping - LG LT-D5480HL 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) Cutting the pipes and the cable.
Use the accessory piping kit 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 longer than the pipe length.
2) Burrs removal
Completely remove all burrs from the cut cross section
of pipe/tube.
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
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
Carry out flaring work using flaring tool as shown below.
Outside diameter
mm inch
Ø9.52
Ø15.88
Ø19.05
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
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.
A
mm
3/8 0.5~0.8
5/8 0.8~1.0
3/4 0.8~1.0
Copper
tube
Point down
Copper tube
Bar
"A"
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches
Even length
all round
–20–
Slanted Uneven Rough
90°
Pipe
Reamer
Flare nut
Handle
Bar
Red arrow mark
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
Yoke
Cone
thickness