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Ceiling Concealed Duct
2. Central Control Devices
Connect CN-CC with Indoor PCB by the cable(provided)
- Connection of Dry contact only
Indoor
PCB
CN-CC
CN-CC
CHANGE
OVER_SW
CN_Ther/Oper
CN_MODE
CHANGEOVER_SW
RESET_SW
Notes
Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage
CN_OUT
For no Power Contact Point signal Input
Operation Display
Power
Local Supply
AC or DC
Error Display
Power
Local Supply
AC or DC
LG does not
supply this section
(Local supply)
In Case Non Voltage Signal
Indoor unit PCBA
Main PCB
Main PCB
Room
Temperature
CN-ROOM Connector
Sensor
• If you need more detail, please refer to the manual of product.
(http://partner.lge.com/global : Home> Download> Manuals)
Outline of system
DRY CONTACT
PCB
24 V~
Thermostat
LG does not
supply this section
Connect separate
(Field supply)
External voltage of
DC 12 V, 24 V~
CHANGE
OVER_SW
CN_WIND
RESET_SW
SETTING_SW
DISPLAY_LED
TEMP_SW
For Power Contact Point signal Input
Operation Display
Power
Local Supply
AC or DC
Error Display
Power
Local Supply
AC or DC
LG does not
supply this section
(Local supply)
In Case Voltage Signal
Indoor Unit
To Apply Power Source through PCB
Thermostat
LG does not
supply this section
(Field supply)
RESET_SW
CN_Ther/Oper
CN_MODE
CN_WIND
CHANGEOVER_SW
SETTING_SW
DISPLAY_LED
TEMP_SW
CN_OUT
Indoor unit
PCB
PI485: Connect to central controller
When using with the central controller (Only when the indoor unit
PCB is a non-communication model)
Modbus
Controller
CAUTION
Remote temperature sensor only applied to
Cassette and Duct products.
To Apply Power Source Directly to External Source
CN_Ther/Oper
CN_MODE
CN_WIND
CHANGEOVER_SW
SETTING_SW
DISPLAY_LED
TEMP_SW
CN_OUT
Field Supply
Error Display
Power
AC or DC
(Depends on Error display power type)
Field Supply
Operation Display
Power
AC or DC
(Depends on Operation display power type)
Indoor Unit Monitoring
Central
Controller
Inverter 50Hz/R410A
_ 9
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