LG PAHCMS000 - Page 26

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PRDCAM AHU Communication Kit Installation Manual
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AHU COMMUNICATIONS KIT INSTALLATION
Solutions Overview
Discharge Air Temperature Control
DDC Control by Modbus: Variable T
e
+ T
d
.
LG Central
Controller
(Optional)
DDCby Modbus
(Field Supply)
T
Room
Room
Remote
Controller
(optional)
Td
DX
Coil
Te
AHU Controller
PAHCMS000
Outdoor Unit
AHU
The DDC controls discharge air temperature (Td) by sending modbus signals to the AHU Communications Kit.
The AHU Communications Kit adjusts the outdoor unit target temperatures (T
e), increasing or decreasing
the discharge air temperatures.
Required Items
Function List
Note :
O : Applied, X : Not applied
1. LG Central controller is based on AC Smart IV and ACP IV
Function List
Modbus Comm. type (DDC) LG Remote Controlle
r
LGCentralController
1
Control
Operating On/Off
O O O
Operation Mode
O O O
Return Air Temperature X X X
Discharge Air Temperature O O O
Forced Thermal On/Off X X X
Capacity Control O X X
Emergency Stop
X X O
Monitor
Operating On/Off
O O O
Operation Mode
O O O
Return Air Temperature O X O
Discharge Air Temperature O X O
Defrost status
O O X
Error Alarm O O O
Compressor On/Off
O O X
Expansion Valve Wired Remote Controller Central Controller
MULTI V
EEV Optional Optional
Single Split
Not Required Optional Optional