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Communications Cable Specifications Between Multiple Indoor Units Operat-
ing as a Group (Group Control)
If any indoor units were specified to operate in unison:
• Before running cable, decide which indoor unit will be the "Mas-
ter." The other indoor units in that group will be designated as
"Slave(s)." The zone controller will be connected to the "Master."
• Set the pertinent DIP switch at each indoor unit to identify the
Master and Slave(s).
• Use a daisy chain configuration and connect all of the group's
indoor units together starting at the "Master" unit.
•
NEVER splice, cut, or extend LG provided cable with field
provided cable. Always include enough cable to cover distance
between all components.
• Perform group control settings and connect the group control
wiring after the system auto address and auto pipe procedures
have been completed.
For indoor units with hardwired connections SIG - 12V - GND
(Comm.) terminals:
• From the controller to the master indoor unit, use 22 AWG,
3-conductor, twisted, stranded, unshielded. All wiring must com-
ply with all applicable local and national codes.
• From the master indoor unit to the slave indoor unit(s), daisy
chain using 22 AWG, 3-conductor, twisted, stranded, unshielded
(
Do not attach wire to 12VDC terminal to the slave indoor
units). All wiring must comply with all applicable local and
national codes.
For indoor units with CN-REMO connections:
Use Group Control Kit (sold separately) containing extension and
Y-splitter cables. Use one (1) group control cable kit for each indoor
unit in the group except for the last indoor unit.
• Cable connected to zone controller is the factory default connection.
• Indoor unit connections depend on indoor unit type.
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.
Communications Cable Specifications
Figure 46: Example of Indoor Unit Group to Zone Controller
Connections (Sig-12V-GND [Comm.] Terminal).
Master Indoor Unit
Indoor Unit
Signal
12VDC Comm.
Signal
4
5
6
Signal
12VDC Comm.
Figure 47: Example of Indoor Unit Group to Zone Controller
Connections (CN-REMO).
Indoor Unit
Master Indoor Unit
CN-REMO
CN-REMO
LG
Supplied
LG Supplied Group Control Kit (PZCWRCG3)
WIRING
Indoor Unit
Signal
12VDC Comm.
12VDC Comm.
Indoor Unit
CN-REMO
51
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