Table Of Contents - Benchmark ZWB 7-29 CC1 Installation And Servicing

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 Mains Voltage external controls connections 21
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
5.10 Digital Timer
5.10.1Basic Settings
5.10.2Button Functions
5.10.3Programming
5.10.4Setting time and day
5.10.5Setting the timed periods
5.10.6Changing the Operating Mode
5.10.7Deleting Settings
5.10.8Completing Programming
5.10.9Time Display
2
3 6 Individual settings
6.1 Mechanical settings
6.1.1 Checking the size of the expansion vessel
3
6.1.2 Setting the central heating flow temperature 28
6.1.3 Changing the heating pump characteristic
6.2 Settings on the Bosch Heatronic
4
6.2.1 Operating the Bosch Heatronic
4
6.2.2 Selecting the pump control mode for central
4
heating mode (Service Function 2.2)
4
6.2.3 Setting the anti-cycle time
5
(Service Function 2.4)
5
6.2.4 Setting the maxim CH flow temperature
6
(Service Function 2.5)
7
6.2.5 Setting the switching difference
8
(Service Function 2.6)
9
6.2.6 Setting the heating output
(Service Function 5.0)
6.2.7 Constant hot water cycle time
10
(Service Function 6.8)
6.3 Setting the gas/air ratio
11
11
7 Converting the appliance to
11
different gas types
11
7.1 Setting the gas/air ratio
12
7.2 Testing combustion air/flue gas at
13
set heat output
13
7.2.1 Testing the O
14
the combustion air
15
7.2.2 Testing CO and CO
15
16
17
8 Maintenance
19
8.1 Pre-Service Check List
8.2 Description of servicing operations
8.3 Replacement of Parts
20
8.3.1 PCB control board and transformer
20
8.3.2 Fan Assembly
8.3.3 Pump
8.3.4 3-way diverter valve
8.3.5 3-way diverter valve motor
22
8.3.6 Sensors
22
8.3.7 Gas Valve
23
8.3.8 Domestic Hot Water Heat Exchanger
23
8.3.9 Electrode assembly
23
8.3.10Pressure gauge
8.3.11Expansion vessel
24
8.3.12Pressure Relief Valve
24
8.3.13Burner
24
8.3.14Flow switch
24
8.3.15Primary Heat Exchanger
24
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9 Appendix
26
9.1 Fault Codes
26
9.2 Short parts list
26
9.3 Heating/hot water output settings (N.G)
26
9.4 Heating/hot water output settings (L.P.G)
26
9.5 Operational Flow diagrams
26
9.5.1 Domestic hot water function
27
9.5.2 Central heating function
27
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or CO level in
2 2
2
6 720 610 599 GB (03.02)
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