LG Tri-Zone Multi F - Page 54

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• Multi F and Multi F MAX systems operate at 1Ø, 208-230V, 60Hz, and power is wired to
the outdoor unit only. The outdoor unit will supply power to the indoor units and the branch
distribution units (Multi F MAX systems only) through the communication / connection
(power) cable.
• Power supply to the outdoor unit must be selected based on NEC and local codes. Maxi-
mum allowable voltage fluctuation ±10% or nameplate rated value.
• Power wiring to the outdoor unit(s) must be solid or stranded, and must comply with all
local and national electrical codes.
• Properly ground the outdoor unit and indoor unit per NEC and local codes.
• Ground wire must 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 or control cover for circuit and terminal block diagrams.
• Always match color codes of each wire and follow wiring diagram.
•
Do not install power wiring to the outdoor unit and the communication / connection (power) cable to the indoor unit in the same conduit.
Use separate conduits.
Power Supply / Power Wiring Specifications
Figure 43: Multi F / Multi F MAX Outdoor Unit
Power Wiring.
7/16" ± 1/8"
13/16
"
GN/YL
Power Wiring, Ground
to Outdoor Unit
ELECTRICAL CONNECTIONS
Always have a trained service provider properly ground the outdoor unit. If the outdoor unit is not properly grounded, there is a risk of electric shock,
physical injury, or death.
• Use a conduit for the communications / connection (power) cable from the outdoor unit to the indoor units and branch distribution unit(s).
Electrical interference my cause product malfunction.
• The communications / connection (power) cable from the outdoor unit to the indoor units / branch distribution unit(s) must be separated and
isolated from power wiring to the outdoor unit, computers, radio and television broadcasting facilities, as well as medical imaging equip-
ment. Electrical interference my cause product malfunction.
• Multi F Systems:
• All communication / connection (power) cable from the outdoor unit to the indoor unit
must be a minimum of 14 AWG, four (4) conductor, 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.
• Multi F MAX Systems:
• All communication / connection (power) cable from the outdoor unit to the branch dis-
tribution unit(s) must be a minimum of 14 AWG, four (4) conductor, 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.
• All communication / connection (power) cable from the branch distribution unit(s) to
the indoor units must be a minimum of 14 AWG, four (4) conductor, 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.
• 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 must be completed without splices.
Communication / Connection (Power) Cable Specifications
Figure 44: Multi F / Multi F MAX Outdoor and
Indoor / Branch Distribution Unit Wiring and Com-
munications Cable Diagram.
Power Wiring, Ground,
Communication Cable
From Outdoor Unit
To Indoor Unit or from the
Outdoor Unit to the Branch
Distribution Unit
13/16”
GN/YL
GN/YL = (Ground, Yellow)
7/16" ± 1/8"
General Information
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54 | ELECTRICAL CONNECTIONS
Multi F and Multi F MAX Heat Pump System Engineering Manual
MULTI
F
MAX
MULTI
F