Bosch Greenstar 12i Service Manual download pdf (Page 9)

APPLIANCE INFORMATION

6 720 644 743b (2011/08)

Fig. 2 Hydraulic block components

1Expansion Vessel 23 Hydraulic block mounting plate

2 Sensor - Boiler flow 24 Left side hand-hold for lifting boiler

3 Removable panel - for servicing 25 Gas valve

4 Electrode assembly 26 Flue air pressure switch connection (not used)

5 Overheat thermostat 27 Fan

6 Securing nut - Air/Gas manifold clamp 28 Fan guard

7 Silicon tube - heat exchanger air vent 29 Manual vent point

8 Heat exchanger 30 Fan pressure test point

9 Flue over heat thermostat 31 Air/Gas manifold

10 Access panel - Heat exchanger/sump cleaning 32 Compact hydraulic - left mounting point

11 Right side hand-hold for lifting boiler 33 Flow connector from heat exchanger

12 Diverter valve assembly (body) 34 Expansion vessel hose connection point

13 Diverter valve actuator (stepper motor blank) 35 Auto air vent

14 Pump 36 Return connection to heat exchanger

15 Drain point 37 Flow turbine housing (not used on i System)

16 Central Heating (CH) return isolator 38 Unused port

17 System pressure gauge 39 Compact hydraulic - right mounting point

18 Control panel (in service position) 40 Pressure relief valve

19 Cover - external wiring connections 41 CH return connection to service valve

20 Cover - transformer and PCB 42 Internal by-pass

21 Gas inlet connection 22 mm 43 CH flow connection to service valve

22 Central Heating (CH) flow isolator 44 Pressure gauge connection point

Tab. 7 Boiler components

6720644743-03.1Wo

32 33 23 3534 36 37

42 15 41

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 71 72

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Bosch Greenstar 12i Service Manual Page 9