Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors page 121

Connection and wiring diagram
PCB KSK 2.03
5
4
A
4
3
2
1
2
1
2
1
6
5
4
3
2
1
4
GND
3
AI
2
13V
1
13V
Fig. 76 Diagram rotated by 90°
Outside temperature sensor
!
Flow temperature sensor
?
Buffer temperature sensors
)
Flue gas temperature sensor
aG
Return temperature sensor
aJ
B Speed, boiler circuit pump
sL
kS A Cleaning, secondary heating surfaces, limit
position
Combustion chamber door, limit switch 1
lJ
Combustion chamber door, limit switch 2
lK
A Speed feedback, flue gas fan
a-Ö
(cont.)
DI
DI
DI
GND
DI
GND
AI
GND
AI
GND
AI
GND
0 ... 20mA
0 ... 20mA
AO
GND
0 ... 20mA
0 ... 20mA
AO
Connection and wiring diagram
B Speed, flue gas fan
a-Ö
KM BUS
aVG
Lambda probe
a:K
Primary air damper stepper motor
s-D
A Primary air damper stepper motor
s-D
Secondary air damper stepper motor
s-F
s-F A Secondary air damper stepper motor
CAN CAN BUS
Jumper, CAN terminator. Delivered condition:
A
Equipped and set, for Vitotrol 350
121