LG UU21WH Installation Manual page 10

Connecting Pipes
Connecting the pipings to the indoor unit and drain hose to drain pipe
• Align the center of the pipings and sufficiently
tighten the flare nut by hand.
• Tighten the flare nut with a wrench.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
• When extending the drain hose at the indoor
unit, install the drain pipe.
Connecting the pipes to the Outdoor unit
• Align the center of the piping and sufficiently
tighten the flare nut by hand.
• Finally, tighten the flare nut with torque wrench
until the wrench clicks.
- When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
Outdoor unit
Torque wrench
h When tighten the pipe, hold the haxagonal body.
10
Torque
kg . m
inch
1/4 1.8~2.5
3/8 3.4~4.2
1/2 5.5~6.6
5/8 6.6~8.2
Torque
wrench
(250mm)
Gas side piping
(Bigger Dia.)
Liquid side piping
(Smaller Dia.)
Tubing Cover
Indoor unit tubing
Torque wrench
Indoor unit tubing
Drain pipe
Vinyl tape(narrow)
Adhesive
Outside diameter
mm inch
Ø6.35 1/4
Ø9.52 3/8
Ø12.7 1/2
Ø15.88 5/8
Flare nut Pipings
Spanner (fixed)
Flare nut
Connection pipe
Indoor unit drain hose
Torque
kg . m
1.8~2.5
3.4~4.2
5.5~6.6
6.6~8.2
Continuous
Torque Torque Torque
wrench wrench wrench
(250mm) (250mm) (250mm)