Flaring Work And Connection Of Piping; Preparation Of Piping - LG MU5R40 Installation Manual

FLARING WORK AND CONNECTION OF PIPING

Preparation of Piping

- Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the follow-
ing procedure.
- Use the de-oxidized copper as piping materials to install.
Cut the pipes and the cable
- Use the piping kit accessory or the pipes pur-
chased 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 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
- Carry out flaring work using dedicated flaring
tool as shown below.
Pipe diameter
Inch (mm)
Wing nut type
1/4 ( 6.35) 0.04~0.05 (1.1~1.3)
Ø Ø
3/8 ( 9.52) 0.06~0.07 (1.5~1.7)
Ø Ø
1/2 ( 12.7) 0.06~0.07 (1.6~1.8)
Ø Ø
5/8 ( 15.88) 0.06~0.07 (1.6~1.8)
Ø Ø
3/4 ( 19.05) 0.07~0.08 (1.9~2.1)
Ø Ø
Firmly hold copper tube in a bar(or clamp) as
indicated dimension in the table above.
FLARING WORK AND CONNECTION OF PIPING
A inch (mm)
Clutch type
0~0.02
(0~0.5)
Copper
Slanted Uneven Rough
tube
90°
Pipe
Point down
Flare nut
Copper tube
Bar
"A"
Copper pipe
15
Reamer
<Wing nut type>
<Clutch type>