To Next PageTo Next Page
Need help?Do you have a question about the Bosch ZBR 42-3 A NG and is the answer not in the manual?
Defines signal words and symbols used in warnings and instructions.
Provides critical safety guidelines for installation and operation.
Lists components included for the ZBR...-3A heating boiler.
Lists components included for the ZWB...-3A combi boiler.
Specifies the intended use and limitations of the Greenstar boiler.
Lists different boiler models (ZBR/ZWB) and their specifications.
Describes the information found on the appliance's data plate.
Details the main components and features of the boiler.
Refers to the Bosch Product Catalog for available accessories.
Provides diagrams and measurements for installation clearances.
Illustrates the internal components of the ZBR...-3A boiler.
Illustrates the internal components of the ZWB...-3A boiler.
Provides the electrical wiring diagram for the ZBR...-3A model.
Provides the electrical wiring diagram for the ZWB...-3A model.
Presents detailed technical specifications and performance data for the ZBR...-3A.
Presents detailed technical specifications and performance data for ZWB models.
Lists typical chemical composition and concentrations of condensate.
Details applicable national and local codes, standards, and guidelines.
Specifies the design and certified operating limits of the heat exchanger.
Outlines specific requirements for Massachusetts installations, e.g., CO detectors.
Shows a piping diagram for a multi-zone setup with zone valves and DHW.
Shows a piping diagram for a multi-zone setup using circulators.
General points to observe during installation and operation of the heating system.
Details on fill water, system flushing, and inhibitor use for system longevity.
Covers compliance, venting systems, and condensate disposal.
Specifies acceptable water supply pressure ranges and recommendations.
Provides diagrams to verify integrated expansion vessel capacity.
Guides on selecting an external expansion vessel based on local regulations.
Lists requirements for installation location, including combustion air quality.
Instructions for preparing and installing pipes before mounting the appliance.
Details on how to properly mount the appliance, including pipe connections.
Step-by-step guide for installing the LWCO safety device.
Information on connecting vent systems, including different types and options.
Covers installation of exhaust and air intake systems with safety warnings.
Illustrates approved methods for horizontal and vertical venting installations.
Provides tables and guidelines for vent and combustion air pipe lengths.
Procedures for testing gas and water connections for leaks after installation.
General safety precautions and electrical code requirements for installation.
Details on connecting low-voltage components to the Heatronic control.
Instructions on how to safely open the Heatronic boiler control unit.
Guidance on connecting Bosch room controls to the boiler's BUS system.
Steps for connecting the outdoor temperature sensor to the control.
Instructions for wiring the DHW tank temperature sensor.
Guidelines for connecting various accessories and managing cable entry.
Details on making electrical connections within the 120 VAC junction box.
Instructions for mounting the junction box rails onto the appliance.
How to connect external pumps to the appliance via the junction box.
How to connect DHW tank pumps or 3-way valves.
Procedure for connecting the main power supply to the boiler.
Step-by-step guide for connecting the LWCO safety device and its components.
Essential checks and procedures before powering up the appliance.
Instructions for turning the appliance on and off.
Guidance on setting the maximum supply temperature for heating.
Instructions for programming the Bosch Room Controller for optimal operation.
Important checks to perform after completing the commissioning process.
How to set the domestic hot water temperature for ZBR models.
How to set the domestic hot water temperature for ZWB models.
How to configure the appliance for summer mode operation.
Steps to ensure the system is protected against freezing.
Instructions for activating the keypad lock for unauthorized access prevention.
Explanation of the pump anti-seize protection function.
How to adjust the boiler pump speed using the dial.
Guide on how to access and navigate the service functions of the Heatronic control.
Lists and categorizes available service functions for the Heatronic control.
How to access the first level of service functions.
How to access the second level of service functions.
Detailed explanations of various service functions available on the Heatronic control.
Explains service function 1.A: Maximum space heating output.
Instructions and warnings for converting the appliance to a different gas type.
Explains derating and altitude adjustment for higher installations.
Procedure for checking and setting the gas-air ratio for optimal combustion.
How to use the dynamic gas pressure test port for checks.
Explains how to use the emissions test button to select outputs.
Procedure for measuring CO content in flue gas, including safety warnings.
Outlines the steps for regular inspection and maintenance tasks.
How to view the latest fault code using service function 6.A.
Procedure for cleaning or replacing the fresh water filter.
How to check, descale, or replace the plate type heat exchanger.
Procedure for checking, cleaning, or replacing electrodes.
Steps for servicing the burner, including safety warnings.
How to inspect and clean the heat exchanger block.
Procedure for cleaning the condensate trap and hose.
How to check the mixer diaphragm for contamination or cracks.
Annual inspection of the expansion vessel's condition.
How to set and check the boiler water pressure for optimal filling.
How to test system water quality, specifically pH, and take corrective actions.
Inspecting electrical wiring for damage and replacing defective cables.
A checklist to guide through service and maintenance procedures.
General troubleshooting steps, safety warnings, and fault handling.
Lists display codes and their corresponding faults and elimination steps.
Lists common faults that do not trigger a display code and their solutions.
Provides resistance tables for checking sensor values.
Resistance values for the outdoor temperature sensor.
Resistance values for the additional supply temperature limiter.
Resistance values for various temperature sensors.
Lists order numbers for replacement code plugs for different models.
General