Between Multiple Indoor Units Operating As Group (Group Control); For Indoor Units With Cn-Remo Connections; General Specifications - LG MULTI F Series Installation Manual

ELECTRICAL
Installation
Between Multiple Indoor Units Operating 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 "Master." The other indoor
units in that group will be designated as "Slave(s)." The zone controller will be connect-
ed to the "Master."
• Set the pertinent DIP switch at each indoor unit to identify the Master and Slave(s).
On wall mounted indoor unit models, set the assignment using the handheld remote
controller.
• 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 cable length with field provided cable. Always
include enough cable to cover distance between all components.
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 comply with all applicable local / national codes.
• From the master indoor unit to the slave indoor unit(s), daisy chain using 22 AWG,
3-conductor, twisted, stranded, unshielded. All wiring must comply with all applicable
local / national codes.
• ( Do not attach wire to 12VDC terminal to the slave indoor units). All wiring must
comply with all applicable local and national codes.
• NEVER splice, cut, or extend cable length; always include enough cable to cover
distance between all components.

For indoor units with CN-REMO connections:

Y-splitter cables. Use one (1) group control cable kit for each indoor unit in the
group except for the last indoor unit.
length with field provided cable.
• Cable connected to zone controller is the factory default connection.
• Indoor unit connections depend on indoor unit type.

General Specifications

• Wired remote controllers can be connected to all indoor unit types.
• Wireless controllers can be used in conjunction with wired remote controllers.
• A dry contact unit can be connected with a central controller simultaneously.
- The master indoor unit is recognized by the dry contact unit and the central
controller.
- Group Control only available for indoor units manufactured after February 2009.
- The central controller can control indoor units after setting the address of the master indoor unit only.
- Slave indoor unit cannot be individually controlled by central controller.
- Slave indoor unit will operate like master indoor unit.
• If an error occurs with the indoor unit, the error will be displayed on the wired remote controller.
• The following functions are available with group control:
• Selection of operation options (operation/mode/set temperature)
• Control of air flow rate (High/Medium/Low)
72
NEVER splice, cut, or extend cable
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.
Figure 98: Example of Indoor Unit Group to Zone
Controller Connections (Sig-12V-GND [Comm.]
Terminal).
Master Indoor Unit
Indoor Unit
Signal 12VDC Comm. Signal
12VDC Comm.
4 5 6
Signal 12VDC Comm.
Figure 99: Example of Indoor Unit Group to Zone
Controller Connections (CN-REMO).
Master Indoor Unit Indoor Unit
CN-REMO CN-REMO
LG
Supplied
LG Supplied Group Control Kit (PZCWRCG3)
Table 33: Accessories for Some Group Control Applications.
Model
Accessory
Number
Wired Remote Group
Control Cable Assembly,
Required for connecting PZCWRCG3
multiple indoor units to a
control group
Wired Remote/Wired
Remote Extension Cable,
Required for extending
the distance between PZCWRC1
indoor units or remote
controllers in a control
group
Indoor Unit
Signal 12VDC Comm.
Indoor Unit
CN-REMO
Image