6 720 610 597 GB (01.07)
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 Connecting TR2 Room thermostat 22
4.3 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
6 Text Display 27
6.1 General Description 27
6.2 Programming 27
6.2.1 Deleting a setting 28
6.2.2 Resetting all parameters
to their original settings 28
6.3 Menu structure 28
6.4 Setting the time/day 29
6.4.1 Setting the time and day 29
6.4.2 Holidays 29
6.5 Heating 29
6.5.1 Heating programme 29
6.5.2 Setting the Economy temperature 30
6.6 Hot water 30
6.6.1 Hot water programme 30
6.6.2 Hot water immediately 30
6.7 i Info 30
6.8 Settings 31
6.8.1 Heating (TR 2) 31
6.8.2 Hot Water
(Storage Tank, ZSBR models only) 31
6.8.3 Service 31
6.9 Individual timer programmes 31
7 Individual settings 32
7.1 Mechanical settings 32
7.1.1 Checking the size of the expansion vessel 32
7.1.2 Setting the central heating flow temperature 32
7.2 Settings on the Bosch Heatronic 32
7.2.1 General description 32
7.2.2 Setting the anti-cycle time
(Service Function 2.4) 33
7.2.3 Setting the maximum CH flow temperature
(Service Function 2.5) 33
7.2.4 Setting the heating output
(Service Function 5.0) 33
7.2.5 Constant hot water cycle time
(Service Function 6.8) 33
7.2.6 Variable pump settings
(Service Function 7.0) 33
7.3 Setting the gas/air ratio 33
8 Converting the appliance
to different gas types 34
8.1 Setting the gas/air ratio 34
8.2 Testing combustion air/flue gas at
set heat output 35
8.2.1 Testing the O
2
or CO
2
level
in the combustion air 35
8.2.2 Testing CO and CO
2
36
9 Maintenance 36
9.1 Pre-Service Check List 37
9.2 Description of servicing operations 38
9.3 Replacement of Parts 41
9.3.1 PCB control board and transformer 41
9.3.2 Fan Assembly 42
9.3.3 Pump 42
9.3.4 3-way diverter valve 43
9.3.5 3-way diverter valve motor 43
9.3.6 Sensors 43
9.3.7 Gas Valve 44
9.3.8 Domestic Hot Water Heat Exchanger 44
9.3.9 Electrode assembly 44
9.3.10Pressure gauge 44
9.3.11Expansion vessel 44
9.3.12Pressure Relief Valve 44
9.3.13Burner 44
9.3.14Flow switch 45
9.3.15Primary Heat Exchanger 45
10 Appendix 46
10.1 Fault Codes 46
10.2 Short parts list 47
10.3 Heating/hot water output settings
ZWBR 7-28 N.G. 48
10.4 Heating/hot water output settings
ZWBR 11-28 L.P.G 48
10.5 Heating/hot water output settings
ZWBR 11-35 N.G. 49
10.6 Heating/hot water output settings
ZWBR 14-35 L.P.G 49
10.7 Operational Flow diagrams 50
10.7.1Domestic hot water function 50
10.7.2Central heating function 51
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