Function Diagram - Bosch Condens 2000 W Service Manual

30 | Failures / Errors
3.8

Function Diagram

Fig. 4
1 Control Unit (Cotronic 3)
2 Water filling valve
3 By-pass pipe
4 DHW temperatur sensor
5 Flow temperature sensor
6 Temperatur limiter
7 Combustion chamber (flue gas safety) sensor
8 Ionisation electrode
9 Inj. nozzle
10 Burner
11 Ignition electrode
12 Heatexchanger
13 Combustion chamber (fresh air)
14 Combustion chamber
15 Fan
16 Condensate-Heatexchanger (Recuperator)
17 Flue gas pipe
18 Expansion vessel
19 Autom. air vent valve
20 Circulation pump
21 CH safety valve
22 Siphon
23 Turbine
24 DHW water flow rate limiter + Filter
25 Manometer
26 Gas valve
27 Siphon (trichtersiphon) (ops.)
28 Regulator valve
29 Gas filter
30 Measurement point (Inj. pressure)
31 Measurement point (Gas inlet pressure)
32 Safety valve
33 CH-Return circuit
34 DHW inlet
35 Gas inlet
36 DHW outlet
37 CH- Flow
38 Manuel air vent valve
40 Flue gas temperature limiter (STB)