Technical data

6 720 611 443 GB (03.11)

Details of the appliance

1.7 Function (with optional extra motorised valve)

Fig. 3

4 Bosch Heatronic control

6 Temperature limiter, heat exchanger

7 Testing point for gas supply pressure

8.1 Pressure gauge

9 Flue gas temperature limiter

13 Manifold

15 Safety valve

18 Central heating pump

20 Expansion vessel

26 Charging valve

27 Automatic vent

29 Mixer unit

29.1 Bi-metallic thermostat for combustion air compensation

30 Burner

32 Flame sensing electrode

33 Igniter electrode

35 Heat exchanger with cooled combustion chamber

36 Temperature sensor in CH flow

43 CH flow

45 Gas inlet

47 CH return

52 Solenoid valve 1

52.1 Solenoid valve 2

55 Filter

56 Gas valve CE 427

57 Main valve disc

61 Reset button

63 Adjustable gas flow restrictor

64 Adjusting screw for min. gas inlet flow volume

69 Control valve

71 Storage water heater outflow (only with optional motorised

valve)

72 Storage water heater return (only with optional motorised

valve)

84 Motor (optional extra)

88 3-way valve (optional extra)

221 Flue duct

226 Fan

229 Inner casing

317 Display

358 Condensate trap

423 Siphon

443 Diaphragm