Electrical Wiring; Power Wiring Specifications And Best Practices - LG MULTI F Installation Manual

F
MULTI
F
MULTI MAX
Power Supply / Power Wiring Specifications
Note:
• Multi F and Multi F MAX systems operate at 1Ø, 208-230V, 60Hz.
• Power supply, wire type and size should be selected based on National Electrical Code and local codes. Maximum allowable voltage fluc-
tuation ±10% or nameplate rated value.
• Properly ground the outdoor units per National Electrical Code and local codes.
• For power to the outdoor units, use field-supplied copper wiring that is solid or stranded, and shielded with the wires separately insulated.
• Ground wire should be longer than the common power / communication wires.
• Connect the wiring firmly so the wires cannot be easily pulled out.
• Refer to the inside of the chassis cover for circuit and terminal block diagrams for your model unit.
• Always match color codes of each wire and follow wiring diagram.
General Communication Cable Specifications
• Multi F Systems: All power wiring / communication cable to be minimum
18 AWG from the outdoor unit to the indoor unit, stranded, shielded or un-
shielded (if shielded, it must be grounded to the chassis of the outdoor unit
only), and must comply with applicable local and national codes.
• Multi F MAX Systems: All power wiring / communication cable to be mini-
mum 16 AWG from the outdoor unit to the BD unit, and 18 AWG from the
BD unit to the indoor unit, stranded, shielded or unshielded (if shielded, it
must be grounded to the chassis of the outdoor unit only), and must comply
with applicable local and national codes.
• For power / communication wires between the Multi F and Multi F MAX
outdoor units and the indoor units / BD units (Multi F MAX systems only),
use a four (4) conductor, stranded, shielded or unshielded wire. If shielded,
the wire must be grounded to the chassis at the outdoor unit only.
• Insulation material as required by local code.
• Rated for continuous exposure of temperatures up to 140°F.
• Firmly attach the cable; provide slack but secure in a way to prevent
external forces from being imparted on the terminal block.
• Wiring should be completed without splices.
Figure 50: Close up of a Typical Ring Terminal.
Ring Terminal
If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death.
Figure 51: Proper and Improper Power Wiring Connections.
Power Wiring
Terminate multiple power wires of
the same gauge to both sides.
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.

ELECTRICAL WIRING

Power Wiring Specifications and Best Practices

Figure 49: Multi F / Multi F MAX Outdoor and Indoor / Branch
Distribution Unit Wiring and Communications Cable Diagram.
Power Wiring, Ground,
Communication Cable
From Outdoor Unit
To Indoor Unit or from the
Outdoor Unit to the Branch
Distribution Unit
GN/YL = (Ground, Yellow)
Do not terminate two wires on
one side.
Power Wiring, Ground
to Outdoor Unit
:Copper Wire
Do not terminate different gauge
wires to a terminal block.
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