Power Wiring Specifications And Best Practices; Electrical Specifications - LG LMN078HVT Installation & Maintenance

F
MULTI
F
MULTI MAX
Line Voltage Wiring and Communications Cable Installation
For both Multi F and Multi F MAX systems, line voltage is wired to the outdoor unit only. The outdoor unit will supply power to the
branch distribution units (Multi F MAX systems only) and the indoor units through the power wiring/communications cable.

Electrical Specifications

1. Multi F and Multi F MAX Outdoor Units: 1Ø, 208-230V, 60Hz
2. Indoor units/Branch Distribution Units (Multi F MAX systems only): 1Ø, 208-230V, 60Hz from ODU (Indoor units draw minimal power.)
3. Select power supply wire type and size based on NEC and local codes. Maximum voltage fluctuation ±10% of the nameplate rated value.
4. Properly ground the outdoor unit per NEC and/or local code.
5. Use only copper wiring that is stranded and shielded with the wires separately insulated.
Power Wiring/Communications Cable Specifications
• From Multi F Outdoor Units to Indoor Units = 4 x 18AWG
• From Multi F MAX Outdoor Units to Branch Distribution Units = 4 x 16AWG
• From Multi F MAX Branch Distribution Units to Indoor Units = 4 x 18AWG
• Maximum Allowable Temperature for Wiring: 194°F
• Indoor Unit(s) to Wired Controller: Three-core cable
• Multi F System Maximum Cable Length: 82 ft.
• Multi F MAX System Maximum Cable Length:
- Outdoor Unit to Branch Distribution Unit(s): 180.4 ft.
- Branch Distribution Unit(s) to Indoor Unit(s): 49.2 ft.
Figure 50: Close up of a Typical Ring Terminal
Ring Terminal

Power Wiring Specifications and Best Practices

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
Figure 52: Power Wiring and Communica-
tions Cable from the Multi F ODU to the
IDUs, or from the Multi F MAX ODU to the
BDUs and from the BD Unit to the IDUs.
Do not terminate two wires on
one side.
:Copper Wire
Do not terminate different gauge
wires to a terminal block.
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