6 720 611 451 GB (03.11)
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 12
3.1 Important remarks 12
3.2 Domestic hot water 12
3.3 Sealed systems 12
3.4 Siting the appliance 13
3.5 Wall mounting frame assembly 14
3.6 Pre-piping the system 14
3.7 Fitting the appliance 15
3.8 Checking the connections 16
3.9 Flue Systems 16
3.9.1 Siting the Flue Terminal 17
3.9.2 Installation of the flue 18
3.9.3 Flue duct preparation and assembly 19
4 Electrical connections 21
4.1 Connecting the appliance 21
4.2 Mains Voltage external controls connections 22
5 Commissioning 23
5.1 Commissioning 23
5.2 Switching the appliance on/off 24
5.3 Switching on the central heating 24
5.4 System controls 24
5.5 Setting the domestic hot water temperature and
flow rate 25
5.5.1 Domestic hot water temperature 25
5.5.2 Hot water flow rate 25
5.6 Summer mode (hot water only) 25
5.7 Frost protection 25
5.8 Pump anti-seize function 25
5.9 Fault Condition 26
5.10 Appliance Data Monitoring 27
6 Individual settings 28
6.1 Mechanical settings 28
6.1.1 Checking the size of the expansion vessel 28
6.1.2 Setting the central heating flow temperature 28
6.1.3 Changing the heating pump characteristic 28
6.2 Settings on the Bosch Heatronic 29
6.2.1 Operating the Bosch Heatronic 29
6.2.2 Setting the anti-cycle time
(Service Function 2.4) 29
6.2.3 Setting the maximum CH flow temperature
(Service Function 2.5) 29
6.2.4 Setting the switching difference
(Service Function 2.6) 29
6.2.5 Setting the heating output
(Service Function 5.0) 29
6.2.6 Constant hot water cycle time
(Service Function 6.8) 30
6.3 Setting the gas/air ratio 30
7 Converting the appliance to different gas
types 31
7.1 Setting the gas/air ratio 31
7.2 Testing combustion air/flue gas at set heat out-
put 33
7.2.1 Testing the O2 or CO2 level in the combustion
air 33
7.2.2 Testing CO and CO2 33
8 Maintenance 34
8.1 Pre-Service Check List 35
8.2 Description of servicing operations 36
8.3 Replacement of Parts 39
8.3.1 PCB control board and transformer 39
8.3.2 Fan Assembly 40
8.3.3 Pump 40
8.3.4 Diverter valve 41
8.3.5 Diverter valve motor 41
8.3.6 Sensors 41
8.3.7 Gas Valve 42
8.3.8 Domestic Hot Water Heat Exchanger 42
8.3.9 Electrode assembly 42
8.3.10Pressure gauge 42
8.3.11Expansion vessel 42
8.3.12Pressure Relief Valve 42
8.3.13Burner 42
8.3.14Flow switch 43
8.3.15Primary Heat Exchanger 43
9 Appendix 44
9.1 Fault Codes 44
9.2 Short parts list 45
9.3 Heating/hot water output settings (N.G) 46
9.4 Heating/hot water output settings (L.P.G) 46
9.5 Operational Flow diagrams 47
9.5.1 Domestic hot water function 47
9.5.2 Central heating function 48
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