Multi F Engineering Manual

Indoor Unit Group Control
ELECTRICAL CONNECTIONS
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 con-
nected 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:
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stranded, unshielded. All wiring must comply with all applicable local / national codes.
• )URPWKHPDVWHULQGRRUXQLWWRWKHVODYHLQGRRUXQLWVGDLV\FKDLQXVLQJ$:*
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:
Use one (or multiple) Group Control Kit(s) (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.
NEVER splice, cut, or extend cable length with field
provided cable.
• Cable connected to zone controller is the factory default connection.
• Indoor unit connections depend on indoor unit type.
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Controller Connections (Sig-12V-GND [Comm.]
Terminal).
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Controller Connections (CN-REMO).
Master Indoor Unit
Indoor Unit
Indoor Unit
Signal
12VDC Comm.
Signal
12VDC Comm.
45
6
Signal
12VDC Comm.
Signal
12VDC Comm.
CN-REMO
On All Indoor Unit Styles
CN-REMO
On All Indoor Unit Styles
CN-REMO
On All Indoor Unit Styles
LG
Supplied
LG Supplied Group Control Kit (PZCWRCG3)
Accessory
Model
Number
Image
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Cable Assembly - Required
for connecting multiple indoor
units to a control group
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:LUHG5HPRWH:LUHG5HPRWH
Extension Cable - Required
for extending the distance
between indoor units or
remote controllers in a control
group
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7DEOHAccessories for Some Group Control Applications.
General Specifications
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• 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.
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• Selection of operation options (operation/mode/set temperature)
• Control of air flow rate (High/Medium/Low)
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220 | WIRING CONNECTIONS
Multi F and Multi F MAX Indoor Unit Engineering Manual
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