LG AS-C306MSeries, Service Manual

Page: 15 / 75

Service Manual 15
Installation
Flaring Work and Connection of Piping
1) Flaring work
Main cause for gas leakage is due to defect in flar-
ing work. Carry out correct flaring work in the follow-
ing procedure.
1. Cut the pipes and the cable.
■
Use the piping kit accessory 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 in a down-
ward direction as you remove burrs in order to
avoid dropping burrs into the tubing.
3. Putting nut on
■
Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having complet-
ed burr removal.
(not possible to put them on after flaring work)
Copper
pipe
90
°
Slanted Uneven Rough
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe
Reamer
Point down
4. Flaring work
■
Carry out flaring work using flaring tool as shown
below.
Firmly hold copper pipe in a die in the dimension
shown 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.
mm inch mm
ø6.35 1/4 0 ~ 0.5
ø9.52 3/8 0 ~ 0.5
ø12.7 1/2 0 ~ 0.5
ø15.88 5/8 0 ~ 1.0
ø19.05 3/4 1.0 ~ 1.3
Outside diameter A
Flare nut
Copper tube
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =