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Ensures safe installation and use of gas appliances according to regulations.
Details of boiler testing, certification, and importance of no unauthorized alterations.
Compliance with EU directives for gaseous fuel appliances and electrical equipment.
Information on adhesives, sealants, and potential hazards of insulation materials.
Handling precautions for insulation materials to avoid skin, eye, and respiratory irritation.
Requirements for safe electrical connection, earthing, and wiring standards.
Immediate actions and whom to contact in case of suspected gas leaks or faults.
Guidance on safe lifting practices and the need for assistance or mechanical aids.
Requirements for controlling the heating system as per building regulations.
Indicates potential system leaks or corrosion; advises contacting service company.
Built-in frost protection and recommendations for additional system protection.
Overview of the Themaclassic plus boiler features and capabilities.
Information on available flue systems and where to find detailed information.
Information on accessories available for the boiler.
Details on built-in safety features like air flow rate and overheating protection.
Instructions for cleaning the boiler casing safely and effectively.
Guidance on ordering and using correct spare parts for the appliance.
Setting the temperature for the central heating circuit between 38°C and 87°C.
Adjusting the domestic hot water temperature from 38°C up to 65°C.
Step-by-step instructions for safely turning on and operating the boiler.
Procedure for safely turning off the boiler by switching off the electrical supply.
How to adjust the hot water temperature setting using the boiler controls.
Detailed steps for adjusting the central heating water temperature.
Instructions on how to select different heating modes for the boiler.
Information on using the holiday mode for frost protection during extended periods.
Procedure for resetting the boiler and contacting service in case of faults.
Steps for filling the heating system and achieving the correct water pressure.
Instructions for setting the correct 24-hour time on the programmer.
Guide for setting the current day of the week on the programmer.
Steps for programming the boiler's on/off times for heating and hot water.
Information on UK and IE regulations, building codes, and wiring standards for installation.
Requirements for gas installation, pressure, and testing for safe operation.
Guidance on designing and installing the central heating system with the boiler.
Details on the boiler's adjustable automatic bypass and its function.
Step-by-step process for filling the heating system and checking pressure.
Guidelines for domestic hot water system installation and water quality considerations.
Recommended clearances and siting considerations for boiler installation.
Requirements and specifications for installing a terminal guard to prevent contact.
Overview of available flue systems and where to find detailed information.
Information on ventilation requirements when installing the boiler in a cupboard.
Instructions on how to cut the flue hole in the wall, considering clearances and slope.
Guidance on connecting the system pipework to the boiler's water fittings.
Requirements and regulations for connecting the boiler to the gas supply.
Procedures for fitting the boiler, including flushing the system and connecting pipes.
Details on safety valves and fitting the filling loop extension.
Steps for installing the horizontal rear flue system for the boiler.
Information on the telescopic flue kit and its length limitations.
Details on the components and dimensions for the telescopic flue system.
Step-by-step guide for fitting the telescopic flue assembly and associated parts.
Details on the kit, its length capabilities, and cutting procedures.
Diagrams illustrating rear and side flue lengths and dimensions.
Important notes on cutting flue pipes, ensuring no burrs or sharp edges.
Detailed steps for assembling and installing the horizontal top flue.
Information on replacement supply cables and their part number.
Connecting external controls like thermostats to the voltage-free terminal.
Procedure for connecting external controls that use mains voltage.
Steps for performing preliminary electrical system checks.
Details on gas installation and purging requirements before commissioning.
Step-by-step guide for filling the heating system and bleeding radiators.
Importance of filling and bleeding the system to prevent noise and ensure proper operation.
Guidance for the installer on instructing the user about boiler operation and maintenance.
Information on the boiler's built-in bypass and how to adjust it if necessary.
Accessing and adjusting operating parameters for installers and service providers.
Adjusting the boiler's maximum heating output in kW.
Adjusting flue parameters for optimal efficiency based on flue length.
Setting the minimum heating temperature to 38°C or 50°C.
Setting the maximum heating temperature to one of four values.
Options for setting the pump operation mode (intermittent or permanent).
Setting the step pressure after gas conversion or valve change.
Reducing burner pressure at maximum setting if network pressure is high.
Procedure for obtaining combustion readings using an analyser tube.
Steps to prepare the boiler for servicing, including isolation and draining.
Instructions for removing and refitting the boiler's front panel.
Guidance on accessing and working with the boiler's control panel.
Instructions for removing and refitting the sealed chamber cover.
Steps for removing and refitting the boiler's side panels for access.
Procedure for draining the domestic hot water circuit of the boiler.
Steps for draining the boiler's internal water circuits for maintenance.
Instructions for removing and refitting the combustion chamber cover.
Checking and adjusting spark and sense gaps for ignition electrodes.
Procedure for removing, cleaning, and refitting the boiler's burner.
Steps for removing and refitting the boiler's fan assembly.
Instructions for cleaning the heat exchanger using a soft brush or vacuum.
Cleaning or replacing the domestic water inlet filter if flow is reduced.
Cleaning or replacing the central heating filter as part of servicing.
Checking the condition of the sealed chamber cover seal and replacing if necessary.
Checking the condition of the combustion chamber insulation.
Checking the flue system for blockages and ensuring all fittings are secure.
Guidance on refitting all parts in the reverse order of removal.
Procedure for locating and resetting the overheat thermostat.
Troubleshooting steps for when the boiler fails to provide central heating.
Diagnosing and resolving issues when only heating works, but hot water does not.
Troubleshooting burner ignition faults where flame is not detected or sustained.
Diagnosing burner faults where it lights but then extinguishes.
Troubleshooting when the burner does not light despite an ignition spark.
Addressing issues of insufficient room temperature and luke-warm radiators.
Troubleshooting lukewarm tap water issues, checking flow and temperature settings.
Diagnosing and resolving faults where the boiler fan fails to start.
Troubleshooting ignition spark issues when the fan is running.
Procedures for draining the central heating and domestic hot water circuits.
Procedure for replacing the central heating thermistor component.
Procedure for removing and replacing the boiler's fan assembly.
Instructions for replacing the fan sensor component.
Steps for replacing the air pressure switch and its associated tube.
Procedure for cleaning or replacing the domestic water inlet filter.
Instructions for cleaning or replacing the central heating filter.
Procedure for cleaning or replacing the cold water inlet restrictor.
Procedures for burner maintenance and injector cleaning.
Procedure for removing and replacing the burner injector assembly.
Instructions for replacing the overheat thermostat and its bracket.
Steps for removing and replacing ignition and flame sense electrodes.
Instructions for removing and cleaning the boiler's heat exchanger.
Procedure for replacing the combustion chamber insulation panels.
Steps for removing and replacing the boiler's main printed circuit board.
Procedures for replacing the user interface and 230V controls boards.
Procedures for replacing the mains switch and central heating pump head.
Procedure for removing and replacing the filling system tap.
Procedures for replacing the reduced pressure zone valve and drain valve.
Steps for replacing the water flow and system pressure sensors.
Procedures for replacing the bypass valve and automatic air vent.
Procedures for replacing the gas control valve and its stepper motor.
Procedures for replacing safety valves and three-way valve parts.
Steps for removing and replacing the boiler's ignition unit.
Procedure for removing and replacing the DHW plate heat exchanger.
Instructions for removing and replacing the domestic safety valve.
Procedures for replacing thermistor, vessel, and heating element.
Detailed steps for removing and replacing the expansion vessel.
Instructions for replacing the seal on the sealed chamber cover.
General| Mounting | Wall-mounted |
|---|---|
| Output Power | 24 kW |
| Central Heating Output | 20 kW |
| DHW Output | 24 kW |
| Fuel Type | Natural gas |
| Ignition | Electronic |
| Heat Exchanger Material | Copper |
| Type | Combination boiler |
