LG PAHCMR000 Installation Manual page 32

AHU COMMUNICATIONS KIT INSTALLATION
External Connection Diagrams
Return Air Temperature Control
Single Zone and LG Control/DDC (Modbus Signal)
Air Handling Unit
(field supply)
Local AHU
Controller
(Field Supplied)
Note :
1. The type of power supply of outdoor unit can vary depending on the outdoor model.
2. Please make wiring between LG controller and outdoor unit with the same polarity.
3. LG controller can be optionally applied with DDC.
32
Central Controller
ACP : CH 1 ~ CH 4
AC SMART : CH 2
Pipe out (Gas) Thermistor
Pipe in (Liquid) Thermistor
Return (Room) Thermistor
DX
Coil
Comm. module
Remote
Controller
12V
SIG
GND
Modbus
Communication
A+ CH1
B-CH1
Refrigerant Piping (Field Supply)
Wire & Thermistor (LG Supply)
Wire (Field Supply)
AI/DI/DO Signal(Field Supply)
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
PI 485
PMNFP14A1
BUS -A
BUS -B
CN_PWR
CN_OUT
Liquid pipe
Gas pipe
RI1 G RI3 G RI4 G
SINGLE N
SINGLE SIG
L
EEV
Adapter
N
SINGLE ZONE
Outdoor unit
CN_CP( N)
CN_CP( L)
CN_CENTRAL
L N
Power Supply
L N
Power Supply