Connecting Pipes - LG UUA1 Montageanleitung

CONNECTING PIPES

Preparation of Piping
- Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
- Use the de-oxidised copper as piping
materials to install.
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.
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)
Flaring work
- Carry out flaring work using dedicated flaring
tool for R32 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 tube in a bar(or clamp) 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)
Clutch type
0~0.02
(0~0.5)
CONNECTING PIPES
Copper
Slanted Uneven Rough
tube
90°
Pipe
Point down
Flare nut
Copper tube
Bar
"A"
Copper pipe
Smooth all round
Inside is shining without scratches.
= Improper flaring =
Inclined Surface
damaged
Even length
all round
21
Reamer
<Wing nut type>
<Clutch type>
Cracked Uneven
thickness