Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 197

Connection diagram, burner control unit
Gas solenoid valve
dG
Power supply
fÖ
Ignition unit
gF
Fan motor
a-Ö
a-Ö A Fan motor control
Connection and wiring diagram
(cont.)
Water pressure sensor
aND
A Water pressure sensor
aND
Burner control unit
A
Gas condensing module control unit (plug
B
C Gas condensing module control unit (plug X4)
)
aBH
197