Name: Bosch ZBR 42-3 A NG
Brand: Bosch
Rating: 4 (1 reviews)

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Product Description

Greenstar – 6721822579 (2021/01)

3.10 Electrical wiring ZWB...-3A

Fig. 8 Electrical wiring diagram ZWB...-3A

6 720 641 933-24.3O

LS NS

Default Chapter2
- Table of Contents2
Contents3
1 Explanation of Symbols and Safety Instructions4
- Explanation of Symbols4
- General Safety Instructions4
2 Scope of Delivery6
- Zbr6
- Zwb7
3 Product Description8
- Proper Use8
- Overview of Boiler Types8
- Rating Plate8
- Appliance Description8
- Accessories8
- Product Dimensions and Minimum Clearances9
- Appliance Layout Heating Boiler ZBR10
- Appliance Layout ZWB12
- Electrical Wiring ZBR14
- Electrical Wiring ZWB16
- Technical Data ZBR18
- Technical Data ZWB21
- Condensate Composition23
4 Regulations23
- Compliance with Standards and Regulations23
- Operating Limits of the Boiler23
- Additional Regulations for Installations in the Commonwealth of Massachusetts24
5 Examples of Installations25
- Multiple Zones Using Zone Valves with DHW25
- Multiple Zones Using Circulators27
6 Notes on Installation and Operation29
- Important Notes29
- Other Important Information30
- Water Supply Pressure30
- Comparing the Size of the Integrated Expansion Vessel31
- Selecting an External Expansion Vessel (ZBR31
- Selecting the Installation Location31
- Pre-Installing Pipes32
- Mounting the Appliance33
- Installing the Low Water Cut off (LWCO)34
- Connecting Flue Gas Accessories35
- Installation of the Exhaust and Air Intake System36
- Examples of Approved Horizontal and Vertical Venting Installation40
- Vent and Combustion Air Pipe Lengths42
  - Testing Gas and Water Connections for Leaks43
7 Electrical Connection44
- General Notes44
- Low Voltage Electrical Connections in the Heatronic Boiler Control44
- Open the Heatronic Boiler Control44
- Connecting the BUS-System44
- Connecting the Outdoor Temperature Sensor45
- Connecting the DHW Tank Temperature Sensor (Only ZBR45
- Connecting Additional Accessories45
- Electrical Connections in the Junction Box (120 VAC)47
- Mounting Rails for Junction Box47
- Connecting an External Heating Zone Pump or DHW Recirculation Pump47
- DHW Tank Loading Pump or 3-Way Valve with Spring Return (Only ZBR48
- Connecting Mains Power Supply48
- Connecting the LWCO Device49
8 Commissioning50
- Before Operating the Appliance51
- Switching the Appliance ON/OFF51
- Switch on Heat51
- Programming the Bosch Room Controller52
- After Commissioning52
- Zbr52
  - Tank: Setting the DHW Temperature52
- Zwb53
  - Setting the DHW Temperature53
- Setting Manual Summer Mode53
- Setting Frost Protection53
- Activating the Key Pad Lock54
9 Zbr54
10 Boiler Circulator54
- Pump Anti-Seize Protection54
- Changing the Pump Curve of the Boiler Pump54
11 Heatronic Boiler Control Settings55
- Guideline to Service Functions55
- Overview of the Service Functions56
- First Service Level (Press and Hold the Service Button until It Lights Up)56
- Second Service Level (at First Service Level, Service Button Lights Up, Press ECO Button and Key Pad Lock Button Simultaneously until 8.A Appears)56
- Description of the Service Functions56
- First Service Level56
- 11.3.2 Second Service Level60
12 Gas Adjustment62
- Converting to a Different Gas Type62
- Installation Location Higher than 2,000 Feet (610 M) above Sea Level62
- Dynamic Gas Pressure Test Port64
13 Flue Gas Test64
- Emissions Test Button64
- Measuring CO Content of Flue Gas64
14 Environmental Protection and Disposal65
15 Inspection and Maintenance65
- Description of Various Steps66
- Calling up the Latest Fault (Service Function 6.A)66
- Fresh Water Filter (Only Combi Boiler ZWB66
- Plate Type Heat Exchanger (Only Combi Boiler ZWB66
- 15.1.4 Checking Electrodes67
- 15.1.5 Burner Servicing67
- 15.1.6 Heat Exchanger Block Inspection and Cleaning68
- 15.1.7 Cleaning Condensate Trap69
- 15.1.8 Checking the Mixer Diaphragm69
- 15.1.9 Checking the Expansion Vessel70
- 15.1.10 Setting the Boiler Water Pressure70
- 15.1.11 Testing System Water Quality70
- 15.1.12 Checking the Electrical Wiring70
- Maintenance and Inspection Checklist71
16 Readings on the Display72
17 Faults73
- Troubleshooting73
- Faults that Are Shown on the Display74
- Faults that Are Not Shown on the Display76
- Check Sensor Values77
- 17.4.1 Outdoor Temperature Sensor77
- 17.4.2 Additional Supply Temperature Limiter77
- Supply Temperature Sensor, External Supply Temperature Sensor, DHW Tank Temperature Sensor, DHW Temperature Sensor77
- Replacement Code Plug77
18 Commissioning Log for the Appliance78

Bosch ZBR 42-3 A NG User Manual

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Brand	Bosch
Model	ZBR 42-3 A NG
Category	Boiler
Language	English