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Baxi COMBI 224 - User Manual

Baxi COMBI 224
36 pages
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If you move house please hand them over to the next occupier.
United Kingdom
en
User Guide
High Efficiency Wall Hung Condensing Gas Boiler
Baxi Combi
224 – 228 – 424 – 428

Table of Contents

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Questions and Answers

  • B
    Benjamin PetersSep 18, 2025
    What does 'Incorrect configuration settings C1/C2' mean on my Baxi COMBI 224 Boiler?
    • R
      Raymond NobleSep 18, 2025
      If your Baxi Boiler displays 'Incorrect configuration settings C1/C2', it means there is incorrect C1/C2, so reset C1/C2.
  • K
    Kathleen Wilson DVMAug 25, 2025
    What to do if my Baxi Boiler has low system water pressure?
    • N
      Nicole JohnsonAug 25, 2025
      If your Baxi Boiler shows low system water pressure, it could be due to a water leak. Check the boiler and the entire system for any signs of leakage. You may also need to repressurize the system.
  • L
    lharrellAug 25, 2025
    How to fix no domestic hot water in my Baxi Boiler?
    • L
      Lindsay BrewerAug 26, 2025
      If your Baxi Boiler isn't providing domestic hot water, start by ensuring the boiler is receiving power by checking the fuses and switches. Also, verify that the gas isolation cock is fully open and, if applicable, that your prepayment meter has sufficient credit. It's also possible that the DHW function is switched off, so try activating the DHW mode. Check the water pressure; if it's below 0.5 bar, re-pressurise the system. Finally, make sure the flow is at least 2.5 litres per minute.
  • G
    Gabriel RobertsonAug 26, 2025
    Why are my radiators cold with my Baxi COMBI 224?
    • C
      Charlene RamosAug 27, 2025
      If your radiators are cold when using your Baxi Boiler, first, check the temperature set point for the heating and increase it using the CH temperature knob or your room thermostat. Make sure the heating mode is activated. Ensure that all radiator valves are open. Also, check that the boiler is receiving power by checking the fuses and switches, and verify the gas isolation cock is open. If the water pressure is too low (below 0.5 bar), re-pressurise the system.
  • C
    Cheryl JacksonSep 23, 2025
    What does 'Parameter error' mean on my Baxi COMBI 224?
    • D
      Deborah GregorySep 23, 2025
      If your Baxi Boiler displays 'Parameter error', it means there are incorrect parameters, so reset C1/C2.
  • J
    Jacob SawyerSep 23, 2025
    What does communication error with the HMI PCB mean on my Baxi Boiler?
    • J
      Jennifer MillerSep 23, 2025
      If your Baxi Boiler shows a communication error with the HMI PCB, it means the HMI is not connected, so check wiring.
  • M
    Mrs. Jenny OliverSep 10, 2025
    What causes a Baxi COMBI 224 Boiler to display 'Return temperature sensor short-circuit'?
    • Z
      Zachary BrownSep 10, 2025
      If your Baxi Boiler displays 'Return temperature sensor short-circuit', it could be due to: * Sensor not or badly connected: Check the wiring. * Bad connection: Check that the sensors are operating correctly. * Sensor fault: Check that the sensor has been correctly fitted and replace the sensor if necessary.
  • T
    Tyler BaldwinSep 12, 2025
    What causes a Baxi COMBI 224 Boiler to display 'Flow temperature sensor short-circuited'?
    • V
      Valerie StuartSep 12, 2025
      If your Baxi Boiler displays 'Flow temperature sensor short-circuited', it could be due to: * Sensor not or badly connected: Check the wiring. * Bad connection: Check that the sensors are operating correctly. * Sensor fault: Check that the sensor has been correctly fitted and replace the sensor if necessary.
  • H
    heathermoraSep 3, 2025
    What to do if my Baxi COMBI 224 Boiler has no circulation?
    • C
      Christopher Moran MDSep 4, 2025
      If your Baxi Boiler has no circulation, it could be due to: * No circulation: Vent the air in the heating system. * Sensor not or badly connected: Check the water pressure and check the wiring. * Sensor fault: Check the circulation (direction, pump, valves), check the cleanliness of the heat exchanger, check that the sensors are operating correctly and replace the sensor if necessary.
  • E
    Elizabeth RomeroSep 1, 2025
    How to fix no circulation of water in my Baxi COMBI 224 Boiler?
    • J
      Jacob MartinezSep 1, 2025
      If there is no circulation of water in your Baxi Boiler, it may be due to: * Non-existent or insufficient circulation: Check circulation. * Sensor error: Check water pressure, check sensors are operating correctly, check that the sensor has been correctly fitted, check the cleanliness of the heat exchanger and check pump.

Summary

1 Safety

1.1 General safety instructions

General safety guidelines for appliance operation and user interaction.

1.2 Recommendations

Advice for proper installation, usage, and maintenance.

1.3 Liabilities

1.3.1 Users liability

User obligations for safe and efficient operation.

1.3.2 Installers liability

Installer responsibilities for installation and commissioning.

1.3.3 Manufacturers liability

Manufacturer's limited liability and product improvements.

2 About this manual

2.1 General

General overview of the manual's purpose and content.

2.2 Additional documentation

Information on optional extras and related sales literature.

2.3 Symbols used

Explanation of symbols used to highlight risks and important information.

3 Technical specifications

3.1 Homologations

Details on certifications and regulatory compliance.

3.2 Technical data

Key technical information, specifications, and parameters.

3.2.2 Dimensions and connections;clearances

Physical dimensions, connection points, and required clearances.

4 Description of the product

4.1 General description

Overview of the Baxi Combi boiler features and capabilities.

4.2 Operating principle

Explanation of how the boiler functions during operation.

4.3 Control panel description

Description of the control panel, keys, and display elements.

4.4 Accessories and options

List and details of available optional accessories for the boiler.

5 Operation

5.1 Start-up

Step-by-step guide for starting up the boiler.

5.1.1 Operation checking procedure and basic fault identification

Procedure for checking boiler operation and identifying initial faults.

5.2 Use of the control panel

Instructions on how to use the boiler's control panel features.

5.3 Shutdown

Steps for safely shutting down the boiler.

5.4 Frost protection

Information and precautions regarding the boiler's frost protection feature.

6 Settings

6.1 List of parameters

Overview of adjustable parameters and how to read them.

6.2 Setting the parameters

Instructions for adjusting central heating and domestic hot water temperatures.

7 Maintenance

7.1 General

General information and recommendations for boiler maintenance.

7.2 Maintenance instructions

Detailed steps for performing routine maintenance checks.

7.2.1 Re-pressurising the system

Procedure for repressurising the heating system.

7.3 Venting the installation

Guide to removing air from radiators and the system.

7.4 Draining the installation

Instructions for draining the central heating system.

8 Troubleshooting

8.1 Error codes

Explanation of temporary and permanent error codes displayed by the boiler.

8.2 Fault finding

Guide to diagnosing and resolving common boiler problems.

9 Decommissioning

9.1 Decommissioning procedure

Steps for safely decommissioning the boiler.

10 Disposal

10.1 Disposal and recycling

Guidelines for the proper disposal and recycling of the boiler.

11 Environmental

11.1 Energy saving

Tips and advice for saving energy when using the boiler.

11.2 Room thermostats and settings

How room thermostats affect energy consumption and comfort.

12 Warranty

12.1 General

Essential requirements for activating and maintaining the boiler warranty.

12.2 Standard warranty terms and conditions

Detailed terms and conditions for the manufacturer's warranty.

13 Appendix

13.1 Product fiche - Combination boilers

Technical data summary (product fiche) for combination boilers.

13.2 Package fiche - boilers

Technical data summary (package fiche) for boilers.

13.3 Package fiche - Combination heaters (boiler or heat pumps)

Technical data summary for combination heaters (boilers or heat pumps).

Baxi COMBI 224 Specifications

General IconGeneral
ModelBaxi COMBI 224
CategoryBoiler
Output24 kW
Dimensions700 x 400 x 300 mm
Flow Rate9.8 L/min
Fuel TypeNatural Gas
Boiler TypeCombi
MountingWall-mounted
DHW Output24 kW

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