6 720 610 576 GB (02.05)
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 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 20
4 Electrical connections 21
4.1 Connecting the appliance 21
4.2 Mains Voltage external controls connections 22
5Commissioning 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 24
5.5.1 Domestic hot water temperature 24
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 25
6 Individual settings 26
6.1 Mechanical settings 26
6.1.1 Checking the size of the expansion vessel 26
6.1.2 Setting the central heating flow temperature 26
6.1.3 Changing the heating pump characteristic 26
6.2 Settings on the Bosch Heatronic 27
6.2.1 Operating the Bosch Heatronic 27
6.2.2 Selecting the pump control mode for central
heating mode (Service Function 2.2) 27
6.2.3 Setting the anti-cycle time
(Service Function 2.4) 27
6.2.4 Setting the maxim CH flow temperature
(Service Function 2.5) 28
6.2.5 Setting the switching difference
(Service Function 2.6) 28
6.2.6 Setting the heating output
(Service Function 5.0) 28
6.2.7 Constant hot water cycle time
(Service Function 6.8) 28
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 38
8.3.1 PCB control board and transformer 38
8.3.2 Fan Assembly 39
8.3.3 Pump 39
8.3.4 3-way diverter valve 40
8.3.5 3-way diverter valve motor 40
8.3.6 Sensors 40
8.3.7 Gas Valve 41
8.3.8 Domestic Hot Water Heat Exchanger 41
8.3.9 Electrode assembly 41
8.3.10Pressure gauge 41
8.3.11Expansion vessel 41
8.3.12Pressure Relief Valve 41
8.3.13Burner 41
8.3.14Flow switch 42
8.3.15Primary Heat Exchanger 42
9Appendix 43
9.1 Fault Codes 43
9.2 Short parts list 44
9.3 Heating/hot water output settings (N.G.) 45
9.4 Heating/hot water output settings (L.P.G) 45
9.5 Operational Flow diagrams 46
9.5.1 Domestic hot water function 46
9.5.2 Central heating function 47
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