Table Of Contents - Worcester ZWBR 7-28 HE plus Installation And Servicing Instructions

Contents
Contents
Safety precautions
Symbols
1 Details of the appliance
1.1 EC Declaration of Conformity
1.2 Standard package
1.3 Description of appliance
1.4 Accessories
1.5 Casing dimensions
1.6 Layout of appliance
1.7 Function
1.8 Electrical wiring diagram
1.9 Technical data
2 Installation regulations
3 Installation
3.1 Important remarks
3.2 Domestic hot water
3.3 Sealed systems
3.4 Siting the appliance
3.5 Wall mounting frame assembly
3.6 Pre-piping the system
3.7 Fitting the appliance
3.8 Checking the connections
3.9 Flue Systems
3.9.1 Siting the Flue Terminal
3.9.2 Installation of the flue
3.9.3 Flue duct preparation and assembly
4 Electrical connections
4.1 Connecting the appliance
4.2 Connecting TR2 Room thermostat
4.3 Mains Voltage external controls connections 22
5 Commissioning
5.1 Commissioning
5.2 Switching the appliance on/off
5.3 Switching on the central heating
5.4 System controls
5.5 Setting the domestic
hot water temperature and flow rate
5.5.1 Domestic hot water temperature
5.5.2 Hot water flow rate
5.6 Summer mode (hot water only)
5.7 Frost protection
5.8 Pump anti-seize function
5.9 Fault Condition
6 Text Display
6.1 General Description
6.2 Programming
6.2.1 Deleting a setting
6.2.2 Resetting all parameters
to their original settings
6.3 Menu structure
6.4 Setting the time/day
6.4.1 Setting the time and day
6.4.2 Holidays
6.5 Heating
6.5.1 Heating programme
6.5.2 Setting the Economy temperature
6.6 Hot water
6.6.1 Hot water programme
6.6.2 Hot water immediately
6.7 i Info
2
6.8 Settings
3
6.8.1 Heating (TR 2)
6.8.2 Hot Water
3
(Storage Tank, ZSBR models only)
6.8.3 Service
4
6.9 Individual timer programmes
4
4
7 Individual settings
4
7.1 Mechanical settings
5
7.1.1 Checking the size of the expansion vessel
5
7.1.2 Setting the central heating flow temperature 32
6
7.2 Settings on the Bosch Heatronic
7
7.2.1 General description
8
7.2.2 Setting the anti-cycle time
9
(Service Function 2.4)
7.2.3 Setting the maximum CH flow temperature
11
(Service Function 2.5)
7.2.4 Setting the heating output
11
(Service Function 5.0)
11
7.2.5 Constant hot water cycle time
12
(Service Function 6.8)
12
7.2.6 Variable pump settings
13
(Service Function 7.0)
14
7.3 Setting the gas/air ratio
14
15
8 Converting the appliance
16
to different gas types
16
8.1 Setting the gas/air ratio
17
8.2 Testing combustion air/flue gas at
18
set heat output
20
8.2.1 Testing the O
in the combustion air
21
8.2.2 Testing CO and CO
21
22
9 Maintenance
9.1 Pre-Service Check List
9.2 Description of servicing operations
23
9.3 Replacement of Parts
23
9.3.1 PCB control board and transformer
24
9.3.2 Fan Assembly
24
9.3.3 Pump
24
9.3.4 3-way diverter valve
9.3.5 3-way diverter valve motor
25
9.3.6 Sensors
25
9.3.7 Gas Valve
25
9.3.8 Domestic Hot Water Heat Exchanger
25
9.3.9 Electrode assembly
25
9.3.10Pressure gauge
25
9.3.11Expansion vessel
26
9.3.12Pressure Relief Valve
9.3.13Burner
27
9.3.14Flow switch
27
9.3.15Primary Heat Exchanger
27
28
10 Appendix
10.1 Fault Codes
28
10.2 Short parts list
28
10.3 Heating/hot water output settings
29
ZWBR 7-28 N.G.
29
10.4 Heating/hot water output settings
29
ZWBR 11-28 L.P.G
29
10.5 Heating/hot water output settings
29
ZWBR 11-35 N.G.
30
10.6 Heating/hot water output settings
30
ZWBR 14-35 L.P.G
30
10.7 Operational Flow diagrams
30
10.7.1Domestic hot water function
30
10.7.2Central heating function
or CO level
2 2
2
6 720 610 597 GB (01.07)
31
31
31
31
31
32
32
32
32
32
33
33
33
33
33
33
34
34
35
35
36
36
37
38
41
41
42
42
43
43
43
44
44
44
44
44
44
44
45
45
46
46
47
48
48
49
49
50
50
51