LG ARTCOOL LAN091HNP, Service Manual

Page: 19 / 76

Service Manual 19
Flaring work and connection of piping
Flaring work and connection of piping
Flaring Work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.
Cutting 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
outdoor unit.
3. Cut the pipes a little longer than measured distance.
4. Cut the cable 4.9ft(1.5m) longer than the pipe length.
Removing burrs
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 dropping
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
1. Firmly hold copper pipe in a die in the dimension shown
in the table below.
2. Carry out flaring work with the flaring tool.
Copper
pipe
90
° Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Outside diameter A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"