LG PAHCMS000 - Page 34

34
PRDCAM AHU Communication Kit Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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AHU COMMUNICATIONS KIT INSTALLATION
External Connection Diagrams
Single Zone + DDC (Contact Signal)
PI 485
PMNFP14A1
Single Zone
Outdoor unit
BUS -A
BUS -B
CN_PWR
CN_CP(N)
CN_CP(L)
CN_CENTRAL
CN_OUT
Liquid pipe
Gas pipe
Pipe out (Gas) Thermistor
AirHandlingUnit
(field supply)
Pipe in (Liquid) Thermistor
DX
Coil
L N
Power Supply
Discharge Thermistor
Central Controller
ACP : CH5
AC SMART : CH1
A+ B-
Main
module
Comm
.
modul
e
ODU Capacity
Control(0~10V)
A+ B- A+ B-
CH3 CH2
RI2 G RI3 G
SINGLE N
RI4 G
Local AHU
Controller
(Field Supplied)
On/Off, Cool/Heat,
Emer.stop
SINGLE S
Adapter
On/Off, Defrost, Alarm,
Comp. status
12V
SIG
GND
L
N
RefrigerantPiping(Field Supply)
Wire& Thermistor(LG Supply)
Wire (Field Supply)
AI/DI/DO Signal(Field Supply)
Remote
Controller
Note :
1. The type of power supply of outdoor unit can vary depending on the outdoormodel.
2. Please make wiring between LG controller and outdoor unit with the same polarity.
3. LG controller can be optionally applied with DDC.
Fan control
1(L)
2(N)
1(L)
2(N) 3 (CN_COM)
EEV
Digital
Output
Digital
Input
Universal
Input