Connecting Pipes To The Indoor Unit - LG AUUH306C Installation Manual

Connecting Pipes to the Indoor Unit

3-1. 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
purchased locally.
I Measure the distance between the
indoor and the outdoor unit.
I Cut the pipes a little longer than
measured distance.
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 outdoor 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
mm inch
Ø6.35 1/4
Ø9.52 3/8
Ø12.7 1/2
Ø15.88 5/8
Ø19.05 3/4
Firmly hold copper tube in a bar(or die) as
indicated 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.
Copper
tube
Point down
Bar
"A"
mm
Copper pipe
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
Smooth all round
1.9~2.1
Even length
all round
Connecting Pipes to the Indoor Unit
Slanted Uneven Rough
90°
Pipe
Reamer
Flare nut
Copper tube
Bar
"A"
Clamp handle
Red arrow mark
Inside is shining without scratches.
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
Installation Manual 15
Handle
Yoke
Cone
thickness