Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 158

Connection and wiring diagram
Connection scheme heat management unit, gas...
From mains distributor box
A
To burner control unit
B
To M2IO electronics module (cylinder module)
C
To burner control unit
D
158
(cont.)
To M2IO electronics module (cylinder module)
E
To the fuel cell module
F
External electricity meter
G