LG PAHCMR000 - Page 30

30
PAHCMR000 AHU Communication Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
External Connection Diagrams
AHU COMMUNICATIONS KIT INSTALLATION
Return Air Temperature Control
Single Zone and DDC (Contact Signal)
DX
Coil
Liquid pipe
Gas pipe
Fan control
Return (Room) Thermistor
Comm. module
2(N)
1(L)
SINGLE N
SINGLE SIG
Universal
Input
Digital
output
On/Off, Defrost, Alarm
GND
12V
SIG
RI1
G
RI3
G
RI4
G
On/Off, Cool/Heat,
Target temp
EEV
ACP : CH 1 ~ CH 4
AC SMART : CH 2
Pipe in (Liquid) Thermistor
Pipe out (Gas) Thermistor
PI 485
BUS -A
BUS -B
CN_CENTRAL
CN_PWR
CN_OUT
2(N)
1(L)
3 (CN_COM)
L N
Remote
Controller
Adapter
L
N
L N
Power Supply
Power Supply
Central Controller
PMNFP14A1
CN_CP(N)
CN_CP(L)
Outdoor unit
SINGLE ZONE
Refrigerant Piping (Field Supply)
Wire & Thermistor (LG Supply)
AI/DI/DO Signal(Field Supply)
Wire (Field Supply)
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.