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Emphasizes installation and servicing by competent persons according to regulations.
Detailed technical specifications including heat input, flow rates, pressures, and electrical data.
Mandates 230V, 50Hz supply, earthing, and isolation via fused plug or switch.
Step-by-step instructions for lifting and securing the boiler onto the hanging bracket.
Covers general electrical safety, compliance with BS7671, and mains connection.
Step-by-step guide for connecting the power cord, earth wire, and terminals.
Ensures electrical safety and proper gas supply installation before initial operation.
Guides the process of filling the central heating system and releasing trapped air.
Step-by-step guide for the first ignition and operation of the boiler.
Instructions on how to adjust the central heating output range using a potentiometer.
Utilizing indicator lights to verify correct operation of DHW and central heating modes.
Pre-service checks including flue, pipework, electricals, and air supply.
Detailed steps for routine servicing, including removing covers and inspecting components.
Steps for reassembling and recommissioning the boiler after maintenance.
Essential safety and preparation steps before starting any component replacement.
Procedures for isolating the boiler and releasing system pressure and water.
Steps for removing and replacing the boiler's gas valve.
Instructions for removing control and switch boards from the boiler.
Steps for replacing switch and control boards.
Explains the function of the boiler's diagnostic indicator lights for fault identification.
A systematic guide to diagnosing and resolving boiler malfunctions.
Essential initial checks including electrical safety, gas supply, and system water.
Flow chart for diagnosing issues related to electrical supply, fuses, and the power indicator.
Flow chart for diagnosing problems with main controls, overheat thermostat, and fuses.
Flow chart for diagnosing issues with central heating controls and external inputs.
Flow chart for diagnosing and resolving issues with the boiler's circulating pump.
Flow chart for diagnosing problems with the fan, flue system, and air pressure switch.
Flow chart for diagnosing issues with the differential pressure switch operation.
Flow chart for diagnosing problems with ignition, gas supply, and flame supervision.
Flow chart for diagnosing burner operation, modulation, and flame issues.
Flow chart for diagnosing problems with domestic hot water production.
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