Connecting Pipes To The Indoor Unit; Connecting Pipes To The - LG Multi Type Installation Manual

Connecting Pipes to the Indoor Unit

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
purchased locally.
Measure the distance between the indoor
and the outdoor 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 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
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
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
Compare the flared work with figure.
If flare is noted to be defective, cut off the
flared section and do flaring work again.
12 Multi Type Air Conditioner
Copper
tube
Bar
"A"
0~0.5
0.5~0.8
0.5~0.8
0.8~1.0
1.0~1.3
Smooth all round
Even length
all round
Slanted Uneven Rough
90°
Pipe
Point down
Flare nut
Copper tube
Bar
"A"
Copper pipe
Clamp handle
Inside is shining without scratches.
= Improper flaring =
Inclined Surface
damaged
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness