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figure 6�16 – Wiring diagram for hooking up the Wilo variable rate pump powered by the unit
Wiring diagram for hooking up the Wilo variable rate pump powered by the unit
LeGend
PM
Hot water circulation
pump (primary circuit)
MA
Unit terminal block
Pump signal 0-10V wire colours
brown connect to -ve
white connect to +ve
black isolate
blue isolate
6�4
tYPe B (ddC)
This paragraph illustrates the operations to be performed when one or more appliances
are connected to a Direct Digital Controller (DDC). In particular:
What is the CAN BUS cable.
1.
How to connect the CAN BUS cable to the appliance's electronic board
2.
How to connect the CAN BUS cable to the DDC.
3.
How to connect the DDC.
4.
How to connect the plant water circulation pump.
5.
For specific information regarding the DDC, refer to the specific manuals supplied with
it.
The appliance and the DDC communicate with each other via a CAN bus network.
The CAN bus network is characterized by a series of elements (appliances or DDCs) called
nodes, connected to each other by a three-wire cable. The nodes are of two types: termi-
nal nodes and intermediate nodes.
