LG ARNU48GV2A4, Installation Manual

Page: 14 / 25

14
THE INDOOR UNIT INSTALLATION
ENGLISH
- 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)
1
Firmly hold copper pipe in a bar with the di-
mension shown in below table table
below.
2
Carry out flaring work with the flaring tool.
1
Compare the flared work with the figure
by.
2
If a flared section is defective, cut it off
and do flaring work again.
1
Align the center of the pipes and suffi-
ciently tighten the flare nut by hand
2
Tighten the flare nut with a wrench
Putting nut on
Flaring work
Flare nut
Copper tube
Outside diameter A
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Check
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Connecting the installation pipe
and drain hose to the indoor unit.
Indoor unit tubing Flare nut Pipes
Outside diameter Torque
mm inch kgf.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1
Wrench
Indoor unit tubing
Open-end wrench
(fixed)
Connection
pipe
Flare nut