LG LP-E5082HL Service Manual ▷ View online
6.3 Piping of indoor unit
1) Preparation of pipings
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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.
¤Ł
Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end down to avoid the metal powder
• Turn the pipe end down to avoid the metal powder
entering the pipe.
Caution:
If burrs are not removed, they may cause gas
leakage.
If burrs are not removed, they may cause gas
leakage.
¤Ø
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.
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.
¤Œ
Tape the flaring part to protect it from dust or
damages.
damages.
– 39 –
4
3
2
1
= Improper flaring =
Inclined
Cracked
Surface
damaged
damaged
Uneven
thickness
thickness
Bar
0~0.5mm
Copper
pipe
pipe
Clamp handle
Bar
Handle
Yoke
Cone
Red arrow mark
Pipe
Point down
Reamer
90
°
Pipe cutter
Slanted
Rough
2) Connection of pipings
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Move the indoor tubing and drain hose to the hole
• Remove tubing holder and pull the tubing out of the
chassis.
¤Ł
Replace the tubing holder into original position
¤Ø
Route the tubing and the drain hose staight
backwards.
backwards.
¤Œ
Insert the connecting cable into the indoor unit
through the hole.
through the hole.
• Do not connect the cable to the indoor unit
• Make a small loop with the cable for easy
connection later.
¤º
Tape the tubing and the connecting cable.
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Indoor unit installation.
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Connecting the pipings to the indoor unit.
• Align the center of the pipings and suffciently
tighten the flare nut with fingers.
• Finally, tighten the flare nut with troque wrench until
the wrench clicks.
When tightening the flare nut with troque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
When tightening the flare nut with troque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
3) Pre-cautions in bending
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If it is necessary to bend or stretch the tubing,
use the Spring which is attached to the tubing
instead of pipe bender.
use the Spring which is attached to the tubing
instead of pipe bender.
• Please make a careful notice to make a smooth line.
• Hold the tubing with your two hands closely and then
bend or stretch it slowly not to make any crack.
• Remember that the radius (R) should not exceed 70
mm (Refer to Fig. 1).
¤Ł
Do not repeat the bending process to prevent the
tubing from cracking or curshing.
tubing from cracking or curshing.
¤Ø
Keep in mind that the bending part should not be
cracked, and make the radius (R) as long as
possible (Refer to Fig.2)
cracked, and make the radius (R) as long as
possible (Refer to Fig.2)
– 40 –
Spring
R70mm
Fig. 1
Fig. 2
R
Indoor unit tubing
Flare nut
Pipings
Torque wrench
Spanner
Pipe Size
Torque
3/8"
4.2 Kg.m
5/8"
5.5 Kg.m
3/4"
6.5 Kg.m
6.4 Connecting the cable to indoor unit
The inside and outside connecting cable can be connected after opening the inlet grille.
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Open the inlet grille manually.
¤Ł
Open the control cover with Driver ( )
¤Ø
Connect the wire to the housing on the control board.
¤Œ
Secure the cable onto the control board with clamp.
¤º
Secure the control cover to the original position with
the screw.
the screw.
¤
Close the inlet grille.
– 41 –
6.5 Connecting Pipings and the cable to Outdoor unit
1) Connecting the pipings to the outdoor unit .
¥L
Align the center of the pipings and sufficiently tighten
the flare nut with fingers.
the flare nut with fingers.
¥M
Finally tighten the flare nut with torque wrench until
the wrench clicks.
the wrench clicks.
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
on the wrench.
2) Connecting the cables to the outdoor unit
– 42 –
Gas side piping
Liquid side piping
Torque wrench
Outdoor unit
Pipe Size
Torque
3/8"
4.2 Kg.m
5/8"
5.5 Kg.m
3/4"
6.5 Kg.m
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Open the control board cover from the outdoor unit
by removing the screws.
by removing the screws.
¤Ø
Secure the cable onto the control board with
clamp.
clamp.
¤Œ
Secure the control board cover to the original
position with the screws.
position with the screws.
¤Ł
Connect wires to the terminals on the control board
individually.
individually.
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