Need help?Do you have a question about the Bosch ZSB18 - 2A and is the answer not in the manual?
Explains symbols used in the manual for clarity and understanding.
Provides crucial safety instructions for installation, operation, and maintenance.
Illustrates the boiler unit and lists its standard carton contents.
Details technical specifications, performance metrics, and operational ratings.
Diagram showing main boiler components and their respective locations.
Instructions for cleaning the heating system before boiler installation.
Details electrical and gas supply requirements and connection standards.
Guidelines for water system connections, pipe types, and pressure.
Instructions for routing and installing the condensate drain pipe correctly.
Details on installing the pressure relief drain line safely and according to standards.
Specifies minimum clearances for boiler installation and servicing.
Explains plumbing manifold connections and relevant pipe dimensions.
Details available flue systems and their maximum straight flue lengths.
Specifies minimum clearances for flue terminal placement relative to building features.
Instructions for unpacking the wall mounting frame and associated installation parts.
Guidance on using the template for wall mounting and marking the flue opening.
Steps for carefully unpacking and handling the main boiler unit.
Details on making all necessary water, gas, and imperial adapter connections.
Instructions for installing the telescopic flue system correctly and safely.
Steps for connecting the condensate drain pipe to the syphon.
Guidance on making electrical connections and wiring the system.
Procedure for filling the central heating system with water and venting.
Guidelines for system flushing, adding inhibitor, and maintaining water quality.
Checks to perform before starting the commissioning process for readiness.
Steps for safely starting the boiler for the first time and setting controls.
Checks for gas pressure, gas rate, and initial boiler operation verification.
Procedures for replacing casings, fitting parts, and final handover.
Procedures for routine inspection and servicing of the boiler.
How to check the gas inlet pressure to the boiler for correct operation.
Verifying the integrity of the flue system and seals for safety.
Procedure to test fan pressure for heat cell condition and cleaning needs.
Steps for conducting flue gas analysis to check combustion efficiency.
Procedure for adjusting the air/gas ratio for optimal combustion performance.
Instructions for cleaning the heat exchanger and its internal components.
Steps to remove the boiler's outer casing for component access.
Procedure for removing and replacing the primary temperature sensor.
Procedure for removing and replacing the overheat thermostat.
Steps for removing and replacing the flue overheat thermostat.
How to move control components to a service position for access.
Procedure for safely removing and replacing the gas valve.
Steps for removing the air/gas manifold and fan assembly.
Procedure for removing and replacing the fan unit.
Steps for replacing the electrode assembly and burner.
Procedure for removing and replacing the heat exchanger.
How to access the boiler's main control board and components.
Steps for identifying and replacing fuses on the printed circuit board.
Procedure for accessing and replacing the transformer and PCB assembly.
Steps for replacing the main electronic control unit.
Procedure for removing and replacing the condensate syphon.
Steps for removing and replacing the diverter valve motor.
Procedure for removing and replacing the diverter valve assembly.
Steps for removing and replacing the auto air vent.
Procedure for removing and replacing the pump head.
Steps for removing and replacing the drain tap.
Procedure for removing and replacing the pressure gauge.
Steps for removing the main hydraulic block assembly.
Procedure for replacing the central heating pressure relief valve.
Steps for removing and replacing the bypass valve.
Procedure for replacing the expansion vessel.
A reference list of common spare parts and their associated part numbers.
Guide to diagnosing faults using indicator lights and system symptoms.
Diagram illustrating the boiler's operational sequence and logic.
Explains the boiler's safety protection functions like frost, pump overrun, and anti-seize.
Explains symbols used in the manual for clarity and understanding.
Provides crucial safety instructions for installation, operation, and maintenance.
Illustrates the boiler unit and lists its standard carton contents.
Details technical specifications, performance metrics, and operational ratings.
Diagram showing main boiler components and their respective locations.
Instructions for cleaning the heating system before boiler installation.
Details electrical and gas supply requirements and connection standards.
Guidelines for water system connections, pipe types, and pressure.
Instructions for routing and installing the condensate drain pipe correctly.
Details on installing the pressure relief drain line safely and according to standards.
Specifies minimum clearances for boiler installation and servicing.
Explains plumbing manifold connections and relevant pipe dimensions.
Details available flue systems and their maximum straight flue lengths.
Specifies minimum clearances for flue terminal placement relative to building features.
Instructions for unpacking the wall mounting frame and associated installation parts.
Guidance on using the template for wall mounting and marking the flue opening.
Steps for carefully unpacking and handling the main boiler unit.
Details on making all necessary water, gas, and imperial adapter connections.
Instructions for installing the telescopic flue system correctly and safely.
Steps for connecting the condensate drain pipe to the syphon.
Guidance on making electrical connections and wiring the system.
Procedure for filling the central heating system with water and venting.
Guidelines for system flushing, adding inhibitor, and maintaining water quality.
Checks to perform before starting the commissioning process for readiness.
Steps for safely starting the boiler for the first time and setting controls.
Checks for gas pressure, gas rate, and initial boiler operation verification.
Procedures for replacing casings, fitting parts, and final handover.
Procedures for routine inspection and servicing of the boiler.
How to check the gas inlet pressure to the boiler for correct operation.
Verifying the integrity of the flue system and seals for safety.
Procedure to test fan pressure for heat cell condition and cleaning needs.
Steps for conducting flue gas analysis to check combustion efficiency.
Procedure for adjusting the air/gas ratio for optimal combustion performance.
Instructions for cleaning the heat exchanger and its internal components.
Steps to remove the boiler's outer casing for component access.
Procedure for removing and replacing the primary temperature sensor.
Procedure for removing and replacing the overheat thermostat.
Steps for removing and replacing the flue overheat thermostat.
How to move control components to a service position for access.
Procedure for safely removing and replacing the gas valve.
Steps for removing the air/gas manifold and fan assembly.
Procedure for removing and replacing the fan unit.
Steps for replacing the electrode assembly and burner.
Procedure for removing and replacing the heat exchanger.
How to access the boiler's main control board and components.
Steps for identifying and replacing fuses on the printed circuit board.
Procedure for accessing and replacing the transformer and PCB assembly.
Steps for replacing the main electronic control unit.
Procedure for removing and replacing the condensate syphon.
Steps for removing and replacing the diverter valve motor.
Procedure for removing and replacing the diverter valve assembly.
Steps for removing and replacing the auto air vent.
Procedure for removing and replacing the pump head.
Steps for removing and replacing the drain tap.
Procedure for removing and replacing the pressure gauge.
Steps for removing the main hydraulic block assembly.
Procedure for replacing the central heating pressure relief valve.
Steps for removing and replacing the bypass valve.
Procedure for replacing the expansion vessel.
A reference list of common spare parts and their associated part numbers.
Guide to diagnosing faults using indicator lights and system symptoms.
Diagram illustrating the boiler's operational sequence and logic.
Explains the boiler's safety protection functions like frost, pump overrun, and anti-seize.
To Next Page
General