LG LS240HEV2 Installation Manual page 50

ELECTRICAL SYSTEM INSTALLATION
Connections and Specifications
Communication / Connection (Power) Cable Specifications from Outdoor
Unit to Indoor Unit
• For communication / connection (power) wires between the Single Zone outdoor unit and the indoor unit for lengths up to 130 feet, use a
minimum 14 gauge, four (4) conductor, stranded, shielded or unshielded wire. If shielded, the wire must be grounded to the chassis at the
outdoor unit only.
• When the communication / connection (power) wires between the indoor unit and outdoor unit is GREATER THAN 130 feet, use:
• A two (2) conductor wire for power.
• A two (2) conductor wire for communication / ground.
• Separate the power AT LEAST two (2) inches away from the communication / ground wire.
• All wiring is still minimum 14 gauge, stranded, shielded, or unshielded as cited above.
• Insulation material as required by local code.
• 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.
Power Wiring, Ground
• Always verify the communication cable is connected to a communications terminal on the Single Zone unit.
to Outdoor Unit
power to the communication cable connection. If contact is made, the PCBs will be damaged.
• The shield of the communications cable connecting the outdoor unit to the indoor unit must be grounded only to the outdoor unit frame.
• Tie the shield of each cable segment together using a wire nut at the indoor unit. Maintain polarity throughout the communication network.
• Position the incoming power to the outdoor unit away from the power / communications cables from the outdoor unit to the indoor unit.
• Never use a common multiple-core communications cable.
Figure 78: Typical Single Zone Outdoor Unit to Indoor Unit Wiring and
Communications Cable Diagram For Wiring Lengths Up to 130 Feet.
Communication / Connection
(Power), Ground Cable
From Outdoor Unit
To Indoor Unit
GN/YL = (Ground, Yellow)
All power wiring and communication cable installation must be performed by trained service providers working in accordance with local, state, and
National Electrical Code (NEC) / UL / ETL federal regulations related to electrical equipment and wiring, and following the manufacturer product
diagrams, requirements, and instructions in this manual. Failure to do so will lead to electric shock which can cause physical injury or death.
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Due to our policy of continuous product innovation, some specifications may change without notification.
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Never apply line voltage