Connection Of Piping - Outdoor - LG UUA1 Series Owner's Manual

CONNECTING PIPES
22

Connection of piping - Outdoor

- 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.
Outside diameter
mm inch
Ø 6.35 1/4
Ø 9.52 3/8
Ø 12.7 1/2
Ø 15.88 5/8
* When tighten the pipe, hold the hexagonal
body.
Outdoor unit
Torque wrench
Torque
wrench
(250mm)
Torque
kg·m
1.8~2.5
3.4~4.2
5.5~6.6
6.6~8.2
Gas side piping
(Bigger Dia.)
Liquid side piping
(Smaller Dia.)
Tubing Cover
Continuous
Torque Torque Torque
wrench wrench wrench
(250 mm) (250mm) (250mm)
Preventing foreign objects from entering
(Figure 2)
- Plug the pipe through-holes with putty or
insulation material(procured locally)to stop up
all gaps, as shown in the figure 2.
<Figure 2>
Resin, Clay, Putty or insulating material
(produced locally)
CAUTION
!
Insects or small animals entering the
outdoor unit may cause a short circuit in
the electrical box.
CAUTION
!
• A brazed, welded, or mechanical
connection shall be made before
opening the valves to permit refrigerant
to flow between the refrigerating
system parts.
• When flared joints are reused indoors,
the flare part shall be re-fabricated. (for
R32)
• When mechanical connectors are reused
indoors, sealing parts shall be renewed.
(for R32)
• Copper in contact with refrigerants shall
be oxygen-free or deoxidized, for
example Cu-DHP as specified in EN
12735-1 and EN 12735-2.
Liquid side piping
Gas side piping
Connecting wire
Drain hose
Connection pipe