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Contact details for customer service, technical advice, and sales inquiries.
Legal and safety guidelines for gas and electrical installations.
Guidance on manual handling, insulation, and health hazards.
Boiler's built-in frost protection and system protection advice.
Procedures for draining and refilling the boiler system.
Overview of boiler types, features, and installation considerations.
Description of safety mechanisms like air flow, overheat, and frost protection.
Recommendations for regular checks, cleaning, and servicing.
Explanation of user interface elements like dials, buttons, and indicators.
Guide to setting time and ON/OFF times for the analogue programmer.
Guide to setting time, programs, and modes for the digital programmer.
How to manually override, change, or delete programmed events.
Common issues and solutions related to programmer operation.
Technical details on heat input, output, and efficiency for heating.
Specifications for hot water, combustion, and gas types.
Electrical ratings and supply requirements for the boiler.
Compliance with regulations, standards, and BSI certification.
Safety advice for handling sheet metal components during installation.
Guidelines for connecting the gas supply according to standards.
Principles for designing the heating system, including pipe sizing and flow rates.
Information on the adjustable automatic bypass and its settings.
Steps for filling the 30ci/35ci and 30si heating systems.
General guidelines for domestic hot water circuits and connections.
Recommendations for water softeners in hard water areas.
Diagram showing internal components of the 30ci and 35ci boilers.
Diagram showing internal components of the 30si boiler.
Recommended spacings and mounting positions for the boiler.
Details on different flue types and terminal guard requirements.
Guidance on ventilation for cupboards or compartments.
List of parts included in the fixing jig kit and sealing washers.
Instructions for cutting the flue hole and preparing the wall opening.
Guidance on connecting water and gas supply lines to the boiler.
Steps for lifting the boiler and connecting system pipework.
Procedures for installing the safety valve discharge pipe and filling loop.
Details on the telescopic rear flue kit and preparing the flue assembly.
Steps to remove the sealed chamber cover for access.
List of parts included in the telescopic top flue kit.
Instructions for assembling the telescopic top flue system.
Step-by-step guide for fitting the telescopic flue assembly.
Details on the 86285H horizontal top flue kit and its components.
Guidance on cutting flue pipes and system diagrams.
Detailed steps for assembling and fitting the horizontal top flue.
Instructions for connecting the mains power cable and ensuring proper earthing.
Connecting external controls to the voltage-free terminals.
Wiring mains voltage controls to the boiler interface.
Steps for testing insulation, continuity, and polarity.
Step-by-step guide to filling the heating system and checking pressure.
How to adjust the central heating output using potentiometers.
Configuration options using DIP switches for pump and heating temperature.
Adjusting flue parameters for optimal boiler efficiency.
Guiding the user on operation, maintenance, and safety advice.
Procedure for converting the boiler to different gas types.
Information on the built-in bypass and minimum flow rate requirements.
How to perform a combustion analysis and check flue gases.
Steps for isolating the boiler and preparing for service checks.
Procedures for accessing the front and control panels for maintenance.
Steps for removing the sealed chamber and side panels.
Inspecting and cleaning the combustion chamber, burner, and related parts.
Cleaning the heat exchanger and servicing water filters.
Interpreting error codes and flashing LEDs for fault diagnosis.
Procedures and expected values for testing gas control valve and step motor.
Testing the three-way valve and domestic water flow sensor.
Diagnosing issues where the burner lights but goes out or has no flame.
Troubleshooting no heating or poor radiator performance.
Diagnosing issues when there is no hot water but heating works.
Troubleshooting problems with the fan not starting or no ignition sparks.
Procedure for replacing the central heating thermistor.
Steps for replacing the fan, air pressure switch, and water inlet filter.
Procedures for replacing the burner and its injectors.
Replacing the burner injector assembly and overheat thermostat.
Procedures for replacing ignition and flame sense electrodes.
Replacing the heat exchanger and combustion chamber insulation.
Steps for replacing the printed circuit board and user interface.
Procedures for replacing the 230V controls board and mains switch.
Replacing the analogue programmer and central heating pump head.
Replacing the filling system tap and reduced pressure zone valve.
Procedures for replacing the boiler drain valve and water flow sensor.
Steps for replacing the system water pressure sensor.
Replacing the bypass valve and automatic air vent.
Procedures for replacing the gas control valve and its stepper motor.
Steps for replacing the discharge safety valve.
Procedures for replacing the three-way valve head and actuator.
Steps for removing and replacing the ignition unit.
Procedure for replacing the domestic hot water plate heat exchanger.
Steps for removing and replacing the expansion vessel.
Replacing the seal on the sealed chamber cover.
General