Connection Of Piping; Precautions In Bending - LG AP-Z Series Svc Manual

Installation of Indoor, Outdoor Unit

2. Connection of piping

① Move the indoor tubing and drain hose to the hole
• Remove tubing holder and pull the tubing out of the chassis.
② Replace the tubing holder into original position
③ Route the tubing and the drain hose staight backwards.
④ Insert the connecting cable into the indoor unit through the hole.
• Do not connect the cable to the indoor unit
• Make a small loop with the cable for easy connection later.
⑤ Tape the tubing and the connecting cable.
⑥ Indoor unit installation.
⑦ 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.
PIPE SIZE
3/8"
1/2"
5/8"
3/4"

3. Precautions in bending

① If it is necessary to bend or stretch the tubing,
use the spring which is attached to the tubing in
stead 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
70mm (Refer to Fig. 1)
② Do not repeat the bending process to prevent the
tubing from cracking or crushing.
③ Keep in mind that the bending part should not be
cracked and make the radius (R) as long as possi-
ble (Refer to Fig. 2)`
Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TORQUE
4.2 Kg . m
5.5 Kg . m
5.5 Kg . m
6.5 Kg . m
- 28 -
Indoor unit tubing
Spanner
Spring
(Fig. 1)
(Fig. 2)
Flare nut Pipings
Torque wrench
R70mm
LGE Internal Use Only