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LMN078HVT Installation Guide

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Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ELECTRICAL WIRING
Ring Terminal
Power Wiring
Figure 50: Close up of a Typical Ring Terminal
:Copper Wire
Terminate multiple power wires of
the same gauge to both sides.
Do not terminate two wires on
one side.
Do not terminate different gauge
wires to a terminal block.
Figure 51: Proper and Improper Power Wiring Connections
Power Wiring Specications and Best Practices
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 uctuation ±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 Specications
• 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.
GN/YL
13/16 inch
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.