High Limit Safety Cut-Out; Programming Unit - Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Components from the parts list
TÜV key

Programming unit

Control unit
H
H
H
H
H
H
H
H
H
H
66
Programming
unit

High limit safety cut-out

H
H º
H
H
º
H
H
∅
H
º