Technical data
6 720 611 445 GB (04.05)
2
Contents
Contents
Safety precautions 3
Symbols 3
1 Details 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
1.6 Layout of appliance 6
1.7 Function 7
1.8 Electrical wiring diagram 8
1.9 Technical data 9
2 Installation regulations 11
3 Installation 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 20
4 Electrical connections 21
4.1 Connecting the appliance 21
4.2 Wiring to your system 22
5 Commissioning 23
5.1 Commissioning 23
5.2 Switching the appliance on/off 24
5.3 Switching on the Boiler 24
5.4 System controls 24
5.5 Frost protection 25
5.6 Fault Condition 25
6 Individual settings 26
6.1 Mechanical 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
7 Converting 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 output 31
7.2.1 Testing the O
2
or CO
2
level in
the combustion air 31
7.2.2 Testing CO and CO
2
31
8 Maintenance 32
8.1 Pre-Service Check List 33
8.2 Description of servicing operations 34
8.3 Replacement 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
8.3.6 Pressure Relief Valve 39
8.3.7 Burner 39
8.3.8 Primary Heat Exchanger 39
9 Appendix 40
9.1 Fault Codes 40
9.2 Short 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