Flaring work, Cut the pipes and the cable, Burrs removal – LG LA121HPMI User Manual
Page 18: Putting nut on
18 Room Air Conditioner
Flaring Work
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes purchased
locally.
2. Measure the distance between the indoor and the out-
door unit.
3. Cut the pipes a little longer than measured distance.
4. Cut the cable 1.5m(59.1in) longer than the pipe length.
Burrs removal
1. Completely remove all burrs from the cut cross section
of pipe/tube.
2. Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-
ping burrs into the tubing.
Putting nut on
• Remove flare nuts attached to indoor and outdoor unit,
then put them on pipe/tube having completed burr
removal.
(not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using flaring tool as shown below.
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the follow-
ing procedure.
mm
inch
mm
inch
Ш6.35
1/4
1.1~1.3
0.043~0.051
Ш9.52
3/8
1.5~1.7
0.059~0.066
Ш12.7
1/2
1.6~1.8
0.063~0.070
Ш15.88
5/8
1.6~1.8
0.063~0.070
Ш19.05
3/4
1.9~2.1
0.074~0.082
Outside diameter
A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe
Reamer
Point down
Copper
pipe
90
°
Slanted Uneven Rough
Firmly hold copper pipe in a die in the dimen-
sion shown in the table above.
Flare nut
Copper tube
Installation