Piping And Drainage Of Indoor Unit - LG AMNH076LQL0 Service Manual

Installation

Piping and Drainage of Indoor Unit

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.
CAUTION: If burrs are not removed,
they may cause a gas leakage.
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.
38 Multi type Air Conditioner
Pipe cutter
90
Point down
"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
Bar
Bar
Copper pipe
Clamp handle
= Improper flaring =
Inclined Surface
damaged
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.
Slanted Rough
Pipe
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness