LG PAHCMR000 Installation Manual page 15

AHU COMMUNICATIONS KIT INSTALLATION
Table 7: RS485/Single Communications Port.
Name Port
Module Comm. RS485 CH1
MULTI V IDU
RS485 CH2
Comm.
Single IDU
SINGLE N/SIG
Comm.
Table 8: NTC Thermistors.
Name Port
Thermistor Room NTC RI1/G
Thermistor Pipe in NTC RI3/G
Thermistor Pipe out NTC RI4/G
Contents
DDC(Modbus)
Comm.
MULTI V IDU Comm.
Single IDU Comm.
Contents
Room (Return) air thermistor
Pipe in (Liquid) thermistor
Pipe out (Gas) thermistor
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Electrical Spec.
Max 1640 ft, Communication with DDC or Main
2C x 18~16 AWG module of PAHCMS000 model
(shield wire) through Modbus protocol
Max 3280 ft,
Communication with MULTI V
2C x 18~16 AWG
Outdoor unit
(shield wire)
Max 246 ft,
Communication with Single Split
2C x 18~16 AWG
Outdoor unit
(shield wire)
Electrical Spec.
NTC10 kΩ,16.4 ft Return air temperature sensor
NTC 5kΩ, 16.4ft Inlet pipe (Liquid) Temp. sensor
NTC 5kΩ, 16.4ft Outlet pipe (Gas) Temp. sensor
Wiring Diagram
Function
Function
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