Piping And Drainage Of Indoor Unit; Preparation Of Pipings; Flaring The Pipes - LG A2UN186FA0 Service Manual

2. 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 leak-
age.

3. 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 0.5~1.0mm higher. (See illustration)
• Flare the pipe ends.
Outside diameter
mm
ø6.35
ø9.52
ø12.7
ø15.88
4. Tape the flaring portion to protect it from the
dust or damages.
A
inch mm
1/4 0.5~0.8
3/8 0.5~0.8
1/2 0.5~0.8
5/8 0.8~1.0
Copper
tube
Point down
Bar
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches
Even length
all round
- 37 -
Slanted Uneven Rough
90°
Pipe
Reamer
Handle
Bar
"A"
Red arrow mark
= Improper flaring =
Inclined Surface Cracked Uneven
damaged
Yoke
Cone
thickness