LG ARNU18GV1A4 Manual De Instalación página 22

THE INDOOR UNIT INSTALLATION
22
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 finishing
flare work)
Flare nut
Copper tube
Flaring work
1
Firmly hold copper pipe in a bar with the
dimension shown in below table table
below.
2
Carry out flaring work with the flaring tool.
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)
Bar
Copper pipe
<Wing nut type>
A inch (mm)
Clutch type
0~0.02
(0~0.5)
"A"
<Clutch type>
Check
1
Compare the flared work with the figure
by.
2
If a flared section is defective, cut it off
and do flaring work again.
Smooth all round
Inside is shiny without scratches
Inclined
Even length
all round
Connecting the installation pipe
and drain hose to the indoor unit.
1
Align the center of the pipes and
sufficiently tighten the flare nut by hand
Indoor unit tubing
2
Tighten the flare nut with a wrench
Outside diameter
mm inch
Ø 6.35 1/4
Ø 9.52 3/8
Ø 12.7 1/2
Ø 15.88 5/8
Ø 19.05 3/4
Wrench
Indoor unit tubing
= Improper flaring =
Surface Cracked Uneven
damaged thickness
Flare nut Pipes
Torque
kgf . m
1.8~2.5
3.4~4.2
5.5~6.5
6.3~8.2
9.9~12.1
Open-end wrench
(fixed)
Flare nut
Connection
pipe