LG PAHCMR000 Installation Manual page 33

Discharge air temperature control
Example 1) MULTI V + EEV + LG Control/DDC (Modbus RTU)
Air Handling Unit
(Field supply)
Local AHU
Controller
(Out of LG scope)
Refrigerant Piping (Field Supply)
Wire & Thermistor (LG Supply)
Wire (Field Supply)
AI/DI/DO Signal(Field Supply)
NOTE
• The type of power supply of outdoor unit can vary depending on the outdoor model.
• Please make wiring between LG controller and outdoor unit with the same polarity.
• LG controller can be optionally applied with DDC.
EEV Kit
Liquid pipe
Gas pipe
Pipe out (Gas) Thermistor
Pipe in (Liquid) Thermistor
DX
Coil
Discharge Thermisto r
Central Controller
ACP : CH5
AC SMART : CH1
A+ B-
Main
module
Modbus
Communication
A+ CH4
B- CH4
EXTERNAL CONNECTION DIAGRAM
Comm.
module
A+ B- A+ B- RI2 G
CH3 CH2
Adapter
L
N
EEV
Wired Remote
Outdoor unit
INT(CEN) B
INT(CEN) A
R S T N
Fuse
R S T N
Power Supply
1)
Power Supply
L N
RI3 G RI4 G
CH 2 A+
CH 2 B-
12V
SIG
GND
Controller
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