LG UM30F Installation Manual page 49

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 (Ø 19.05) 0.07~0.08 (1.9~2.1)
Bar
"A"
Copper pipe
A inch (mm)
Clutch type
0~0.02
(0~0.5)
<Wing nut type>
<Clutch type>
THE INDOOR UNIT INSTALLATION
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.
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
49
= Improper flaring =
Surface Cracked Uneven
damaged thickness