Technical data

6 720 611 445 GB (03.11)
2
Contents
Contents
Safety precautions 3
Symbols 3
1Details of the appliance 4
1.1 EC Declaration of Conformity 4
1.2 Standard package 4
1.3 Description of appliance 4
1.4 Accessories 5
1.5 Casing dimensions 5
1.6Layout of appliance 6
1.7 Function 7
1.8 Electrical wiring diagram 8
1.9Technical data 9
2Installation regulations 11
3Installation 11
3.1 Important remarks 11
3.2 System 11
3.3 Siting the appliance 13
3.4 Wall mounting frame assembly 14
3.5 Pre-piping the system 14
3.6 Fitting the appliance 15
3.7 Checking the connections 16
3.8 Flue Systems 16
3.8.1 Siting the Flue Terminal 17
3.8.2 Installation of the flue 18
3.8.3 Flue duct preparation and assembly 19
4Electrical connections 21
4.1Connecting the appliance 21
4.2 Wiring to your system 22
5Commissioning 23
5.1 Commissioning 23
5.2Switching the appliance on/off 24
5.3Switching on the Boiler 24
5.4 System controls 24
5.5 Frost protection 24
5.6 Fault Condition 25
6Individual settings 26
6.1Mechanical settings 26
6.1.1 Setting the boiler flow temperature 26
6.2 Settings on the Bosch Heatronic 26
6.2.1 Operating the Bosch Heatronic 26
6.2.2 Setting the anti-cycle time
(Service Function 2.4) 27
6.2.3 Setting the maximum boiler flow temperature
(Service Function 2.5) 27
6.2.4 Setting the switching difference
(Service Function 2.6) 27
6.2.5 Setting the heating output
(Service Function 5.0) 27
6.3 Setting the gas/air ratio 28
7Converting the appliance to different gas
types 29
7.1 Setting the gas/air ratio 29
7.2 Testing combustion air/flue gas at set heat out-
put 31
7.2.1 Testing the O2 or CO2 level in the combustion
air 31
7.2.2 Testing CO and CO2 31
8Maintenance 32
8.1 Pre-Service Check List 33
8.2 Description of servicing operations 34
8.3Replacement of Parts 37
8.3.1 PCB control board and transformer 37
8.3.2 Fan Assembly 38
8.3.3 Sensors 38
8.3.4 Gas Valve 38
8.3.5 Electrode assembly 39
8.3.6Pressure Relief Valve 39
8.3.7 Burner 39
8.3.8 Primary Heat Exchanger 39
9Appendix 40
9.1 Fault Codes 40
9.2Short parts list 41
9.3 Heating/hot water output settings (N.G) 41
9.4 Heating/hot water output settings (L.P.G) 41
9.5 Operational Flow diagrams 42
9.5.1 Central heating function 42