LG Art Cool Premier LA120HYV1 Installation Manual page 46

ELECTRICAL WIRING
Power Wiring Specifications and Best Practices
Power Supply / Power Wiring Specifications - Continued
WARNING
• If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death.
• Never ground the shield of the communications cable to the indoor unit frame or other grounded entities of the building. There is risk
of fire, electric shock, and physical injury or death.
• Never apply line voltage power to the communications cable terminal block. If contact is made, the PCBs may be damaged.
• Always include some allowance in the wiring length when terminating. Provide some slack to facilitate removing the electrical panels
while servicing.
General Communication Cable Specifications
• Use a four (4 )conductor, stranded, shielded or unshielded cable
between the Single Zone outdoor unit and the indoor unit. If shield-
ed, it must be grounded at Outdoor unit chassis only. Must comply
with applicable national code.
• Minimum 18 gauge shielded CVVS or CPEVS cable.
• Insulation material as required by local code.
• Rated for continuous exposure of temperatures up to 140 °F.
• Always verify the communication cable is connected to a communications terminal on the Single Zone unit.
• Never apply line voltage power to the communication cable connection. If contact is made, the PCBs may be damaged.
• The shield of the communications cable connecting the outdoor unit to the indoor unit should be grounded only to the outdoor unit frame.
• Tie the shield of each cable segment together using a wire nut at each indoor unit. Maintain polarity throughout the communication network.
• Position the outdoor unit communications cables away from the power wiring.
• Never use a common multiple-core communications cable. Each communications bus shall be provided a separate cable (i.e., be-
tween outdoor unit and indoor unit).
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• Maximum allowable cable length: 984 feet.
• Firmly attach the cable; provide slack but secure in a way to pre-
vent external forces from being imparted on the terminal block.
• Wiring should be completed without splices.
• Terminate the cable shield to a grounded surface at the outdoor
unit only.