LG MS15SQNB0 Manual De Instalación página 20

THE INDOOR UNIT INSTALLATION
20
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.
Outside diameter Temper grade
mm inch Annealed(o)
Ø6.35 1/4 Annealed(o)
Ø9.52 3/8 Annealed(o)
Ø12.7 1/2 Annealed(o)
Ø15.88 5/8 Annealed(o)
Bar
Bar
Copper pipe
Clamp handle
CAUTION
!
Copper in contact with refrigerants shall
be oxygen-free or de-oxidized, for exam-
ple Cu-DHP as specified in EN 12735-1
and EN 12735-2
1
2
1
A
2
mm
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
Handle
Yoke
Cone
Red arrow mark
Check
Compare the flared work with the figure by.
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.
Align the center of the pipes and sufficient-
ly tighten the flare nut by hand
Indoor unit tubing
Tighten the flare nut with a wrench
Outside diameter
mm inch
Ø6.35 1/4
Ø9.52 3/8
Ø12.7 1/2
Ø15.88 5/8
Wrench
Indoor unit tubing
CAUTION
!
• The installation of pipe-work shall be
kept to a minimum
• Flared joint shall be restricted to use
with annealed pipe only, and to pipe
sizes not exceeding a diameter of 20
mm outside diameter.
= 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
Open-end wrench
(fixed)
Flare nut
Connection
pipe