Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual page 74

Initial start-up
Further step-by-step instructions
Updating the LON particpant list on Vitotronic 300-K, MW1S
Only possible if all participants are connected and the control unit is programmed as fault manager (coding 79 : 1, factory
default condition)
Please note:
In each heating system, only one Vitotronic may be encoded as fault manager.
1. Press w and simultaneously for
approx. 2 seconds.
The participant check is initiated
(see page 76).
2. Press D.
The participant list is updated after
approx. 2 minutes.
The participant check is completed.
74
(cont.)