LG LV240HV4 Installation Manual page 48

ELECTRICAL SYSTEM INSTALLATION
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, use a minimum 18 gauge,
four (4) conductor, stranded, shielded or unshielded wire. If shield-
ed, the wire must be grounded to the chassis at the outdoor unit
only.
• Install insulation material as required by local code.
• Firmly attach the cable; provide slack but secure in a way to pre-
vent external forces from being imparted on the terminal block.
• Wiring must be completed without splices.
• Always verify the communication cable is connected to a commu-
nications terminal on the Single Zone unit.
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 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.
48
Never apply line
Due to our policy of continuous product innovation, some specifications may change without notification.
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Power Wiring, Ground
to Outdoor Unit
Figure 65: Single Zone Outdoor Unit to Indoor Unit Wiring and Commu-
nications Cable Diagrams.
Communication / Connection
(Power), Ground Cable
From Outdoor Unit
To Indoor Unit
GN/YL = (Ground, Yellow)
Figure 66: General VAHU Power / Communication System Diagram.