LG A2UQ166FA0, Service Manual, Page: 38 / 238

38 Multi type Air Conditioner
Installation
1. Preparation of pipings
1) Cut the pipes and the cable.
• Use the accessory piping kit or the pipes pur-
chased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than the measured
distance.
• Cut the cable 1.5m longer than the length of the
pipe.
2) Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end toward down to avoid the
metal powder entering the pipe.
3) Flaring the pipes.
• Insert the flare nuts, mounted on the connection
ports of both indoor and outdoor unit, onto the
copper pipes. Some refrgerant gas may leak,
when the flare nuts are removed from the indoor
unit, as some gas is charged to prevent the
inside of the pipe from rusting.
• Fit the copper pipe end into the Bar of flare tool
about 0~0.5mm higher. (See illustration)
• Flare the pipe ends.
4) Tape the flaring portion to protect it from the
dust or damages.
90
Slanted
Pipe cutter
Rough
Reamer
Pipe
Point down
"A"
Bar
Copper pipe Clamp handle
Red arrow mark
Cone
Bar
Yoke
Handle
Inclined Cracked Uneven
thickness
Surface
damaged
= Improper flaring =
"A": ø15.88 mm (5/8")
→
0~1.0 mm
ø12.7 mm (1/2")
→
0~0.5 mm
ø9.52 mm (3/8")
→
0~0.5 mm
ø6.35 mm (1/4")
→
0~0.5 mm
Piping and Drainage of Indoor Unit
CAUTION: If burrs are not removed,
they may cause a gas leakage.
When properly flared, the internal surface flare will
evenly shine and be of even thickness.
Since the flare part comes into contact with the connec-
tors, carefully check the flare finish.