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General| Boiler Type | Condensing |
|---|---|
| Output | 35 kW |
| Fuel Type | Natural Gas |
| Fuel Type (Alternative) | LPG |
| Efficiency (Alternative) | 93% |
| Mounting | Wall-mounted |
Provides a detailed overview of the boiler's features and specifications.
Lists available optional accessories and their purpose for the boiler.
Illustrates and labels the main components of the boiler's internal layout.
Explains the boiler's primary circuit operation and heating sequence.
Details the boiler's built-in frost protection feature and its limitations.
Describes the mechanism to prevent pump sticking during idle periods.
Presents detailed technical specifications for the Baxi System 35/80 IE model.
Outlines requirements for the central heating system and water treatment.
Describes the integral automatic bypass feature of the boiler.
Explains the need for external controls like timers for system operation.
Details the procedure and regulations for filling and pressurising the system.
Specifies the expansion vessel's role and capacity for system operation.
Details the function, setting, and discharge requirements of the PRV.
General installation information and regulatory compliance.
Lists relevant standards and codes for installation and safety.
Specifies minimum clearances required around the boiler for safe installation.
Guidance on selecting a suitable location for boiler installation and flue routing.
Requirements for ventilation when installing the boiler in a compartment.
Details on gas connection type, size, and installation requirements.
Specifies electrical connection requirements, voltage, and fusing.
Recommendations for flue terminal positioning and safety.
Information on flue kit lengths and maximum permissible equivalent flue lengths.
Instructions for fitting the flue terminal trim for a neat finish.
Details on fitting a terminal guard for safety and compliance.
Illustrations and information on various available flue systems.
Steps for preparing the site and positioning the fixing template for installation.
Procedure for flushing the heating system before connecting the boiler.
Instructions for unpacking and preparing the boiler for fitting.
Steps for mounting the boiler onto the wall plate and connecting pipes.
Guidance on connecting the discharge pipe for the pressure relief valve.
Detailed instructions for installing the horizontal flue system.
Information on connecting flue extensions and additional elbows.
Step-by-step guide for connecting the mains input cable to the boiler.
Diagrams and explanations for typical system wiring configurations.
Wiring instructions for operating the boiler with indirect hot water cylinders.
Essential electrical system checks to perform before commissioning the boiler.
Steps for filling, pressurising, and preparing the boiler for operation.
Procedure for checking and adjusting the burner gas pressure settings.
Final steps for refitting panels and handing over the boiler to the user.
Recommended annual servicing procedures for the boiler by a competent person.
Procedure for replacing the pressure switch component.
Instructions for removing and replacing the boiler fan assembly.
Steps for safely removing and replacing the heat exchanger unit.
Procedure for removing and replacing the burner assembly.
Instructions for replacing the burner injectors.
Procedure for replacing the ignition and flame sensing electrodes.
Guidance on replacing insulation pieces within the boiler casing.
Steps for removing and replacing the main gas valve.
Procedure for replacing the CH temperature sensor.
Instructions for replacing the safety thermostat component.
Procedure for replacing the return heating temperature sensor.
Instructions for replacing only the pump head unit.
Procedure for replacing the entire pump assembly.
Instructions for replacing the automatic air vent.
Procedure for replacing the system pressure gauge.
Instructions for replacing the expansion vessel.
Procedure for replacing the combined gas valve plug and spark generator.
Instructions for replacing the Domestic Hot Water relay circuit board.
Procedure for replacing the main Printed Circuit Board (PCB).
Instructions for replacing the boiler's selector switch.
Procedure for replacing the CH differential valve assembly.
Instructions for replacing the microswitch on the CH differential valve.
Procedure for replacing the pressure relief valve.
A list of common replacement parts with their key and manufacturer part numbers.
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