Functional Diagram Of The Heater - Bosch WR11B series Installation Manual And Operating Instructions

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Functional diagram of the heater

Fig. 2 Functional diagram
1 Pilot burner
2 Igniter electrode
3 Ionisation detector
4 Heat exchanger
5 Main burner
6 Injector
7a Testing point for burner pressure
7b Testing point for supply pressure
8 Venturi
9 Temperature/volume selector
10 Water valve
11 Adjusting screw for min. water flow rate
12 Water flow regulator
13 Water filter
14 Cold water supply pipe
15 Diaphragm
16 Microswitch
17 Main gas valve
18 Regulating screw
Technical Characteristics and Dimensions | 7
19 Gas inlet
20 Gas filter
21 Battery compartment
22 Hot water pipe
23 Igniter unit
24 Led indicator for burner status
25 ON/OFF switch
26 Led indicator for battery charge level
27 Servo valve
28 Output control
29 Gas valve
30 Gas valve for pilot burner
31 Pilot burner injector
32 Gas pipe for pilot burner
33 Temperature limiter
34 Flue gas safety device
6 720 648 592 (2011/06)