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Communications Cable Specifications from RTUs to Remote Controllers
• Communication cable from RTU to Remote Controller(s) is to be LG supplied or field supplied 22 AWG, 3-conductor, twisted, stranded,
unshielded. Wiring must comply with all applicable local and national codes.
• If using LG supplied cable and the length needs to be extended, the LG Extension Kit (sold separately) must be used. A maximum of four
(4) kits (up to 165 feet) can be used.
• Remote Controllers have hardwired connections: SIG - 12V - GND (Comm.) terminals.
• See diagrams below for two options: terminal block connections and Molex connections. Refer to the wiring diagram schematic found in the
RTU itself, or to the wiring diagram in this Manual.
•
NEVER splice, cut, or extend cable length with field provided cable. Always include enough cable to cover distance between the RTU
and the remote controller.
• Set the RTU operating parameters using DIP switches, or by setting up the remote controller. Refer to the remote controller installation
manuals for more details.
Figure 38: One Example of RTU to Zone Controller Connection.
4 5 6
13 14 15
Cable connected to Zone Controller is the factory default connection.
Split Rooftop Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Communication Cable Specifications
Figure 39: Another Example of RTU to Zone Controller Connection.
Split Rooftop Unit
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