Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual page 36

Heating system types
Circuit Diagram 15 (CM2 only)
Possible applications
The cascade and DHW tank control
must be activated by a building
automation system.
IMPORTANT
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
heating contractor to check that this
recommendation is complete and fully
functional.
Coding of Change required
system type
01: 1 Set coding "01: 3" for multi-boiler system
with external cascade control via switch
contacts
02: 1 Set coding "02: 2" for operation with
modulating burner
0d: 2 Set coding "0d: 0"
36
(continued)
The Vitocrossal 200 is operated with
constant boiler water temperature by
means of the boiler control unit and
the Viessmann fully modulating burner.
Motorized isolation valve
Connect motorized 120V isolation
valve adaptor (Part No. 7511 367)
or 24V valve adaptor (Part No.
7511 366), installed in connection
enclosure, in parallel.
Use electric junction box if necessary.
Automatic change
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