6 720 610 597 GB (03.02)
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 17
3.9.1 Siting the Flue Terminal 18
3.9.2 Installation of the flue 19
3.9.3 Flue duct preparation and assembly 21
4 Electrical connections 22
4.1 Connecting the appliance 22
4.2 Connecting TR2 Room thermostat 23
4.3 Mains Voltage external controls connections 23
5 Commissioning 24
5.1 Commissioning 24
5.2 Switching the appliance on/off 25
5.3 Switching on the central heating 25
5.4 System controls 25
5.5 Setting the domestic hot water
temperature and flow rate 26
5.5.1 Domestic hot water temperature 26
5.5.2 Hot water flow rate 26
5.6 Summer mode (hot water only) 26
5.7 Frost protection 26
5.8 Pump anti-seize function 26
5.9 Fault Condition 27
6 Text Display 28
6.1 General Description 28
6.2 Programming 28
6.2.1 Deleting a setting 29
6.2.2 Resetting all parameters to their original
settings. 29
6.3 Menu structure 29
6.4 Setting the time/day 30
6.4.1 Setting the time and day 30
6.4.2 Holidays 30
6.5 Heating 30
6.5.1 Heating programme 30
6.5.2 Setting the Economy temperature
(if TR2 is connected) 30
6.5.3 Manual operating mode
(if TR2 is not connected) 31
6.6 Hot water 31
6.6.1 Hot water programme 31
6.6.2 Hot water immediately 31
6.7 i Info 31
6.8 Settings 32
6.8.1 Heating (if TR 2 is connected) 32
6.8.2 Hot Water (Storage Tank,
ZSBR models only) 32
6.8.3 Service 32
6.9 Individual timer programmes 32
7 Individual settings 33
7.1 Mechanical settings 33
7.1.1 Checking the size of the expansion vessel 33
7.1.2 Setting the central heating flow temperature 33
7.2 Settings on the Bosch Heatronic 33
7.2.1 General description 33
7.2.2 Setting the anti-cycle time
(Service Function 2.4) 34
7.2.3 Setting the maximum CH flow temperature
(Service Function 2.5) 34
7.2.4 Setting the heating output
(Service Function 5.0) 34
7.2.5 Constant hot water cycle time
(Service Function 6.8) 34
7.2.6 Variable pump settings
(Service Function 7.0) 34
7.3 Setting the gas/air ratio 34
8 Converting the appliance to different
gas types 35
8.1 Setting the gas/air ratio 35
8.2 Testing combustion air/flue gas at set
heat output 36
8.2.1 Testing the O
2
or CO
2
level in the
combustion air 36
8.2.2 Testing CO and CO
2
37
9 Maintenance 37
9.1 Pre-Service Check List 38
9.2 Description of servicing operations 39
9.3 Replacement of Parts 42
9.3.1 PCB control board and transformer 42
9.3.2 Fan Assembly 43
9.3.3 Pump 43
9.3.4 3-way diverter valve 44
9.3.5 3-way diverter valve motor 44
9.3.6 Sensors 44
9.3.7 Gas Valve 45
9.3.8 Domestic Hot Water Heat Exchanger 45
9.3.9 Electrode assembly 45
9.3.10Pressure gauge 45
9.3.11Expansion vessel 45
9.3.12Pressure Relief Valve 45
9.3.13Burner 45
9.3.14Flow switch 46
9.3.15Primary Heat Exchanger 46
10 Appendix 47
10.1 Fault Codes 47
10.2 Short parts list 48
10.3 Heating/hot water output settings
ZWBR 7-30 N.G. 49
10.4 Heating/hot water output settings
ZWBR 11-30 L.P.G 49
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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