Viessmann Vitodens 200-W 19 WB2B Series Installation Instructions Manual page 58

Additional Information
Wiring Diagram
(continued)
Complete system wiring diagram
Legend
1 Outside Temperature Sensor
2 Flow Temperature Sensor/Low Loss Header
3 Boiler Water Temperature Sensor
DHW Temperature Sensor
5
11
Ionization Electrode
15 Flue Gas Temperature Sensor
20 Boiler Pump
20A
System Pump
21 DHW Pump
28 DHW Re--circulation Pump
Flow Switch
Gas Valve
Power Supply
58
(continued)
Fixed High Limit
Fault Alarm Output
Ignition Transformer
Power Supply Accessory (Not Used)
Fan Motor
Fan Motor Control
143
External Blocking Terminals 2--3
External Demand Terminals 1--2
External Heating Program Changeover
Terminals 1--2
The Allocation of the Function "External
Heating Program Changeover" is Set
Via Coding Address '91'
144
External 0--10V Signal
KM BUS to PPM/Accessories
Gas Modulation Coil
A1 Main PCB (GC130 Ignition Module)
A2 Internal Power Supply Unit
A3 Optolink
A4 Burner Control Unit
A5 Programming Unit
A6 Coding Card
A7 Connection Adapter
A8 LON/Cascade Communication Module
S1 ON/OFF Switch
S2 Reset Button
X.. Electrical Interfaces
BK BLACK
WH WHITE
G GREEN
RD RED
GY GREEN/YELLOW
BN BROWN
BL BLUE