Bosch 250 SXO NG - Manual (Page 22)

6 720 607 440
22
Electrical diagram
6 Electrical diagram
Fig. 29 Electrical scheme
1 Intlet water temperature sensor
2 Ionization sensor
3 Water flow sensor
4 Over heat protection
5 Temperature limiter
6 Gas valve
7 Fan
8 Water valve
9 AC Plug
10 Ignition electrode
11 Display PCB
12 ON/OFF switch
13 Fuse T 2,5A
14 Fuse T 3,15A
15 Terminal block
16 Ground post
17 Outlet water temperature sensor
18 Connector for Anti-freeze
19 Anti-freeze device (Heating resistors)
20 Temperature sensor
Fig. 30 Anti-freeze electrical scheme