System Architecture - Daikin WCT Series Operating & Maintenance Manual

System Architecture

The overall controls architecture uses the following:

One MicroTech III main controller

I/O extension modules (sometimes referred to as "controllers") as needed depending on the configuration of the
unit

Optional BAS interface as selected

In series counter-flow system, both lead WCT chiller controller and lag WCT chiller controller are available to
communicate and have optimized series counter-flow system capacity control by looking at common ELWT at lag
chiller, when providing "Konex" interface cable between controllers are provided and series chiller mode is
chosen from MicroTech III controller.
Figure 8, System Architecture
BAS Interface
(BACnet,
Lon, Modbus)
ModBus TCP
PC
Touch Screen
OMM WCT
MicroTech III Main Controller
EXV
Controller
Centrifugal Chillers
I/O Extension
Peripheral Bus
Tower Control
I/O Extension
Circuit 1 C.C. 1
I/O Extension
Circuit 1 V.C. 1 Controller
I/O Extension
Circuit 1 O.P. 1
I/O Extension
Circuit 2 C.C. 2
EXV I/O Extension
Circuit 2 V.C. 2
I/O Extension
Circuit 2 O.P. 2
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