Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 51

Installation sequence
Terminal connections
(cont.)
Common flow sensor (flow temperature sensor, system scheme
3)
A
B
2 b
BSB
1 2 3 4
ATS B42/
Funk
B10
Regelung
A Common flow sensor (common flow B Junction box
temperature sensor)
See system version 3 on page 19 for use
and layout of the common flow sensor.
51