LG ACHH017VBAB Installation And Owner's Manual page 95

Refer to the wiring diagram for field-installed wiring. Only the main panel (HMI installed panel) requires wiring at the site. The control box is
shipped fully wired from the factory.
5. Circuit Breaker and Power Wiring Connections.
Table 16: Field-Installed Wiring / Cable Connections.
Central control communication
Global water inlet sensor
Global water outlet sensor
• Each chiller must have its own circuit breaker and direct power
wiring.
• Do not install one circuit breaker for multiple chillers.
not daisy chain the power wiring from the main power supply to
multiple chillers.
• Always label each circuit breaker and its connected chiller.
• Refer to the specification and electrical data when selecting circuit
breaker capacities. Follow all state, local, and NEC guidelines
when choosing and installing circuit breakers and power wiring.
Index
Power
Communication
HMI communication Communication
Modbus Communication
Ambient thermistor
Flow switch
Pump interlock
Remote On/Off
Remote CO/HP
Remote alarm
Alarm status
On/Off status
Pump output
Heater output
Water spray output
Remote Target Temp
Remote Demand Limit
Due to our policy of continuous product innovation, some specifications may change without notification.
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Signal type Location
DC Power 12 V DC
CH2 A, B
CH3 A, B
CH4 A, B Optional (Field connection)
DI UI1, G
DI UI5, G
DI UI6, G Optional (Field connection)
DI DI1, GND Optional (Field connection)
DI DI2, GND Optional (Field connection)
DI DI3, GND Optional (Field connection)
DO DO1, COM Optional (Field connection)
DO DO2 Optional (Field connection)
DO DO3 Optional (Field connection)
DO DO5 Optional (Field connection)
DO DO6 Optional (Field connection)
AI UI3, GND Optional (Field connection)
AI UI4, GND Optional (Field connection)
AI UI7, GND Optional (Field connection)
AI UI8, GND Optional (Field connection)
Table 15: Power Wiring System to Multiple, Grouped Chillers.
Do
Circuit Breaker
ELECTRICAL
Wiring / Cable Installation
Remarks
Necessary
Necessary
Necessary
Necessary
Necessary
(Except H/P model)
Circuit Breaker Circuit Breaker
Main Power Supply
Circuit Breaker
Main Power Supply
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