LB-D1860HL — LG Air Conditioner Service Manual (repair manual). Page 12

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–19–
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.
Use the accessory piping kit 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.
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
direction 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 out-
door 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.
Firmly hold copper tube in a bar(or die) as indicat-
ed dimension in the table above.
5) Check
Compare the flared work with figure.
If flare is noted to be defective, cut off the flared
section and do flaring work again.
Copper
tube
90
°
Slanted   Uneven  Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Outside Diameter
" A "
Gas
Liquid
Gas
Liquid
18K BTU
5/8"
3/8"
0.8~1.0 0.5~0.8
Capacity
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