Bosch ZWB24-1AR Series - Electrical Circuit Diagram

Failures / Errors | 27
3.6 Electrical Circuit Diagram
Fig. 2
Legends :
1 Fan
2 Flue gas temperature limiter (STB) (Recuperator)
3 Water level switch
4 Ionisation electrode
5 Pump
6 Turbine
7 Operating LED
8 LCD Display
9 DHW temperatur regulator
10 Flow temperatur regulator
11 Transformer
12 Controller (room thermostat) connection
13 Diagnostic connection
14 Igniton transformer
15 Supply cable
16 DHW temperature sensor (NTC)
17 Gas valve
18 Ignition electrode
19 Temperatur limiter (STB)
20 Flow temperature sensor
21 Flue gas safety (combustion chamber) sensor
6 720 644 501 04 1O
15
1
5
13
12
17
5
2
6
20
18 4
19
2
3
14
16
3
11
21
7
9
10
8