Preparation Of Piping - LG ARUN040LSS0 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 1.5m 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 Clutch type
Ø 1/4 (Ø 6.35)
Ø 3/8 (Ø 9.52)
0.04~0.07
(1.1~1.8)
Ø 1/2 (Ø 12.7)
Ø 5/8 (Ø 15.88)
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
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)
www.lgcomfortcooling.co.uk
0~0.02
(0~0.5)
Copper
tube
90°
Point down
Flare nut
Copper tube
<Wing nut type>
Smooth all round
Inside is shining without scratches.
Inclined
Even length
all round
INSTALLATION
23
Slanted Uneven Rough
Pipe
Reamer
Bar
"A"
Copper pipe
<Clutch type>
= Improper flaring =
Surface Cracked Uneven
damaged thickness