Burner Control Unit Connection Scheme - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Burner control unit connection scheme

Fig. 118
PWM Control signal
X... Electrical interfaces
§ A/B Common flow temperature sensor/high limit
safety cut-out
Outlet temperature sensor
$
Ionisation electrode
aA
Flue gas temperature sensor
aG
Return temperature sensor
aJ
Boiler circuit pump
sÖ
Flow sensor
dD
dG Gas solenoid valve
B
A
Connection and wiring diagram
Power supply
fÖ
gF Ignition unit
Fan motor
a-Ö
A Fan motor control
a-Ö
Water pressure sensor
aND
Burner control unit
A
Heat management unit gas condensing module
B
( plug)
aBH
Heat management unit gas condensing module
C
(X4 plug)
C
159