Flaring Work - LG AMNW Series Installation Manual

Flaring work

Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
1
Cut the pipes
- 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(4.9ft) longer than the
pipe length.
Copper
tube
90°
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.
Point down
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)
Flare nut
Copper tube
Slanted Uneven Rough
Pipe
Reamer
4
Flaring work
- Carry out flaring work using flaring tool as
shown below.
A Inch (mm)
Pipe diameter
Inch (mm)
Wing nut type
Ø1/4 (Ø6.35) 0.04~0.05 (1.1~1.3)
Ø3/8 (Ø9.52) 0.06~0.07 (1.5~1.7)
Ø1/2 (Ø12.7) 0.06~0.07 (1.6~1.8)
Ø5/8 (Ø15.88) 0.06~0.07 (1.6~1.8)
Ø3/4 (Ø19.05) 0.07~0.08 (1.9~2.1)
Bar
"A"
Copper pipe
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.
Smooth all round
Inside is shining without scratches.
Inclined
Even length
all round
INSTALLATION
15
Thickness
Inch (mm)
Clutch type
0.03 (0.7)
0.03 (0.8)
0~0.02
0.03 (0.8)
(0~0.5)
0.04 (1.0)
0.04 (1.0)
<Wing nut type>
<Clutch type>
= Improper flaring =
Surface Cracked Uneven
damaged thickness