Preparation Of Piping - LG AP-Z Series Service Manual

Piping of Indoor Unit

1. Preparation of piping

Cut the pipes and the cable
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than measured
distance.
• Cut the cable 1.5m longer than the pipe length.
Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end down to avoid the metal pow-
der entering the pipe.
Caution:
If burrs are not removed, they may cause a gas
leakage.
Flaring the pipes.
• Insert the flare nuts, mounted on the connection
ports of both indoor and outdoor unit, onto the
copper pipes. Some refrigerant 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 illustaration)
• Flare the pipe ends.
Tape the flaring part to protect it from dust or
damages.
Installation of Indoor, Outdoor Unit
Pipe cutter
90°
Point down
0~0.5mm
Bar
Bar
Copper
pipe
Clamp handle
= Improper flaring =
1 2
Inclined Surface
damaged
Slanted Rough
Pipe
Reamer
Handle
Yoke
Cone
Red arrow mark
3 4
Cracked Uneven
thickness
Service Manual 27