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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.
I Use the accessory piping kit or the pipes pur-
chased locally.
I Measure the distance between the indoor and
the outdoor unit.
I Cut the pipes a little longer than measured dis-
tance.
I Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
I Completely remove all burrs from the cut cross
section of pipe/tube.
I 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
I 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
I Carry out flaring work using flaring tool as shown
below.
Outside Diameter
Capacity
Gas
48K BTU
3/4"
Firmly hold copper tube in a bar(or die) as indicat-
ed dimension in the table above.
5) Check
I Compare the flared work with figure.
I If flare is noted to be defective, cut off the flared
section and do flaring work again.
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
" A "
Liquid
Gas
Liquid
1/2"
1.0~1.3 0.5~0.8
Copper
tube
Point down
Copper tube
Bar
Copper pipe
Smooth all round
Even length
all round
- 19 -
Slanted Uneven Rough
90°
Pipe
Reamer
Flare nut
Handle
Bar
"A"
Clamp handle
Red arrow mark
Inside is shining without scratches.
= Improper flaring =
Inclined
Surface
Cracked Uneven
damaged
LGE Internal Use Only
Yoke
Cone
thickness
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