LG PAHCMR000 - Page 15

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Installation
Due to our policy of continuous product innovation, some specications may change without notication.
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Name Port Contents Electrical Spec. Function
Thermistor Room NTC RI1/G
Room (Return) air thermistor NTC10 kΩ,16.4ft Return air temperature sensor
Thermistor Pipe in NTC RI3/G Pipe in (Liquid) thermistor
NTC5kΩ, 16.4ft Inlet pipe (Liquid) Temp. sensor
Thermistor Pipe out NTC RI4/G Pipe out (Gas) thermistor NTC5kΩ, 16.4ft Outlet pipe (Gas) Temp. sensor
Name Port Contents Electrical Spec. Function
Module Comm. RS485 CH1
DDC(Modbus)
Comm.
Max 1640 ft,
2C x 18~16 AWG
(shield wire)
Communication with DDC or Main
module of PAHCMS000 model
through Modbus protocol
MULTI V IDU
Comm.
RS485 CH2
MULTI V IDU Comm.
Max 3280 ft,
2C x 18~16 AWG
(shield wire)
Communication with MULTI V
Outdoor unit
Single IDU
Comm.
SINGLE N/SIG Single IDU Comm.
Max 246 ft,
2C x 18~16 AWG
(shield wire)
Communication with Single Split
Outdoor unit
AHU COMMUNICATIONS KIT INSTALLATION
Wiring Diagram
Table 7: RS485/Single Communications Port.
Table 8: NTC Thermistors.