Preparation Of Piping - LG Multi V S Installation Manual

Preparation of Piping

Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following
procedure.
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 1.5 m longer than the pipe
length.
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.
Flaring work
- Carry out flaring work using flaring tool as
shown below.
Pipe diameter
inch (mm) Wing nut type
Ø 1/4 (Ø 6.35) 0.04~0.05 (1.1~1.3)
Ø 3/8 (Ø 9.52) 0.06~0.07 (1.5~1.7)
Ø 1/2 (Ø 12.7) 0.06~0.07 (1.6~1.8)
Ø 5/8 (Ø 15.88) 0.06~0.07 (1.6~1.8)
Ø 3/4 (Ø19.05) 0.07~0.08 (1.9~2.1)
Firmly hold copper pipe in a bar with the
dimension shown in the table below.
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.
A inch (mm)
Clutch type
0~0.02
(0~0.5)
Copper
Slanted Uneven Rough
tube
90°
Pipe
Point down
Bar
"A"
Copper pipe
Smooth all round
Inside is shining without scratches.
Inclined
Even length
all round
INSTALLATION
21
Reamer
<Wing nut type>
<Clutch type>
= Improper flaring =
Surface Cracked Uneven
damaged thickness