External Changeover Of Multi-Stage/Modulating Burners - Viessmann Vitotronic 200 Installation And Service Instructions Manual

External connections at plug . . .
!
Please note
The heating system has no
frost protection when the
burner is switched OFF.
The boiler is not held at the
lower boiler water temperature.
External connections at plug aVH
A External changeover of stepped/
modulating burners
(zero volt contact)
B External demand
(zero volt contact)

External changeover of multi-stage/modulating burners

Set code "02:2".
Contact open: modulating operation
Contact closed: two-stage operation
Installation sequence
(cont.)
Note
When scanning the burner version,
the address for modulation appears
even after an external changeover (no
rewriting).
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