External Changeover Of Staged/Modulating Burners; Connection Of Combustion Air Device - Viessmann VITOTRONIC 100 GC1B Installation And Service Instructions Manual

Vitotronic 100, GC1B Installation and Service

External Changeover of Staged/Modulating Burners

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A External changeover (dry contact)

Connection of Combustion Air Device

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A Combustion Air Device Adaptor
B DIN Rail in connection enclosure
Connection at Plug aVH.
Note: 'Live' contacts lead to short circuits or phase failure.
The external connection must be potential-free.
Contact open: modulating mode
Contact closed: two stage mode
Note: When scanning the burner version, the address
for modulation appears even after an external
changeover.
Code
Set code "02:2" in group 2 "Boiler".
Connection of the Combustion Air Device Adaptor
1. Disconnect power to control and burners.
2. Install Combustion Air Device Adaptor, on DIN Rail
inside connection enclosure (refer to installation
manual of Combustion Air Device Adaptor).
3. Remove jumper between terminals 16 and 17.
4. Make connection as shown in the diagram.
IMPORTANT
Wire BK2 must be connected to terminal 16 and BK3 to
terminal 17 - DO NOT reverse.
For more detail, refer to the combustion air
device Installation Instructions.
Installation Sequence
61