Baxi 424 Combi 2 - User Manual

Other manuals for Baxi 424 Combi 2

Installation And Service Manual84 pages

Questions and Answers

K
Kristin CobbAug 16, 2025
What to do if the flow temperature increases too quickly in heating mode on my Baxi Boiler?
- M
  Mr. David MaysAug 16, 2025
  If the flow temperature increases too quickly in heating mode on your Baxi Boiler, it may be due to insufficient circulation or other causes. You should: * Check the boiler/installation circulation. * Activate a manual venting cycle. * Check the installation pressure. * Check the operation of the pump. * Check the cleanliness of the exchanger. * Check the operation and connection of the temperature sensors.
M
Melinda BlairAug 22, 2025
Why does my Baxi Boiler reach the maximum flow or return temperature?
- C
  Christopher LongAug 22, 2025
  If your Baxi Boiler reaches the maximum flow or return temperature, it may be caused by insufficient circulation. To address this, check the boiler and installation circulation, and activate a manual venting cycle.
M
Mark WhiteAug 25, 2025
How to troubleshoot a pressure sensor open/faulty error on a Baxi 424 Combi 2 Boiler?
- R
  Robert BrownAug 26, 2025
  If the pressure sensor is open or faulty on your Baxi Boiler, it is likely due to a sensor or connection problem. Check the operation of the pressure sensor and the sensor/PCB connection.
D
Donald RichardsonAug 28, 2025
What to do if there is a temporary communication failure in the PCB of my Baxi 424 Combi 2 Boiler?
- D
  Doris FullerAug 28, 2025
  If there is a temporary communication failure in the PCB of your Baxi Boiler, the error should be resolved automatically.
K
Kathryn MoraAug 31, 2025
What to do if the Baxi 424 Combi 2 flow temperature increases too quickly in heating mode?
- J
  Joel JamesAug 31, 2025
  If the flow temperature increases too quickly in heating mode, this may be due to insufficient circulation or other causes. You should: * Check the boiler/installation circulation. * Activate a manual venting cycle. * Check the installation pressure. * Check the operation of the pump. * Check the cleanliness of the exchanger. * Check the operation and connection of the temperature sensors.
V
Victoria KnightSep 3, 2025
What to do if my Baxi 424 Combi 2 Boiler reaches the maximum temperature difference between flow and return?
- S
  Stephanie YoderSep 3, 2025
  If your Baxi Boiler reaches the maximum temperature difference between flow and return, it could be due to insufficient circulation or other causes. Consider the following: * Check the boiler/installation circulation. * Activate a manual venting cycle. * Check the installation pressure. * Check the cleanliness of the exchanger. * Check the operation of the temperature sensors. * Check the temperature sensor connection.
R
Robert HarrisonSep 6, 2025
What to do if my Baxi 424 Combi 2 Boiler reaches the maximum flow or return temperature?
- G
  Gary GuerreroSep 6, 2025
  If your Baxi Boiler reaches the maximum flow or return temperature, this may be caused by insufficient circulation. You should check the boiler/installation circulation and activate a manual venting cycle.
V
Valerie HopkinsSep 9, 2025
How to troubleshoot a Baxi 424 Combi 2 pressure sensor that is open or faulty?
- M
  Melinda HernandezSep 9, 2025
  If the pressure sensor is open or faulty, it indicates a sensor or connection problem. Check the operation of the pressure sensor and the sensor/PCB connection.
L
Lisa LongSep 10, 2025
What to do if the maximum temperature difference value between flow and return is reached on a Baxi 424 Combi 2 Boiler?
- J
  Jason SpencerSep 12, 2025
  If the maximum temperature difference between flow and return has been reached on your Baxi Boiler, this could be due to insufficient circulation or other causes. To resolve this, you can: * Check the boiler/installation circulation. * Activate a manual venting cycle. * Check the installation pressure. * Check the cleanliness of the exchanger. * Check the operation and connection of the temperature sensors.
D
darrensweeneySep 12, 2025
What to do if my Baxi 424 Combi 2 Boiler experiences a temporary communication failure in the PCB?
- A
  Amber LoganSep 12, 2025
  The error is resolved automatically.

Summary

Safety

General Safety Instructions

Key safety guidelines for operating the boiler and preventing hazards.

Recommendations

Advice on system checks, accessibility, and proper maintenance for optimal performance.

Liabilities

Clarifies the responsibilities of users, installers, and the manufacturer.

About this manual

General

Introduction to the manual's purpose, intended audience, and safety warnings.

Symbols Used

Explains the meaning of various danger levels and symbols used in the document.

Abbreviations and Glossary

Provides definitions for technical terms and abbreviations used throughout the manual.

Technical Specifications

Homologations

Details certification numbers, NOx class, and boiler type classifications.

Technical Data

Comprehensive technical data including heat output, energy efficiency, and consumption figures.

Dimensions and Connections;Clearances

Illustrates boiler dimensions and identifies all pipe connections and clearances required.

Description of the Product

General Description

An overview of the boiler's purpose, features like low emissions, high efficiency, and compact design.

Operating Principle

Explains air-gas adjustment, combustion process, and how heating and hot water are produced.

Control Panel Description

Detailed explanation of the control panel, knobs, icons, and button functions.

Accessories & Options

Information on available accessories and optional features for the boiler.

Operation

Start-up

Step-by-step guide for the initial power-up and boiler initialization process.

Changing the Heating Flow Temperature

Instructions on how to adjust the desired water temperature for the heating system.

Changing the Domestic Hot Water (DHW) Temperature

Guidance on setting and adjusting the temperature for domestic hot water.

Shutdown

Procedures for safely switching off the heating and domestic hot water functions.

Frost Protection

Details on the boiler's automatic frost protection feature and its operation.

Settings

Access to User Parameters

Method for navigating and accessing user-configurable settings on the control panel.

List of User Parameters

A comprehensive table detailing user parameters, their factory settings, and ranges.

Maintenance

General

Overview of general maintenance, annual servicing, and warranty requirements.

Maintenance Instructions

Routine checks, cleaning advice, and pressure monitoring for boiler upkeep.

Filling the Installation

Steps for re-pressurising the heating system if water pressure is too low.

Venting the Installation

Procedure for removing air from the heating circuit to ensure quiet operation.

Maintenance Message

Explanation of the 'SVC' indicator for scheduled maintenance.

Troubleshooting

Temporary and Permanent Faults

Classification and overview of fault codes displayed by the boiler.

Error Codes

Detailed list of temporary and permanent fault codes with causes and solutions.

Fault Finding

A guide to diagnosing and resolving common operational problems and issues.

Decommissioning

Decommissioning Procedure

Instructions for safely disconnecting and preparing the boiler for removal.

Disposal

Disposal and Recycling

Guidance on environmentally responsible disposal and recycling of the appliance.

Environmental

Energy Saving

Practical tips for optimizing energy efficiency and reducing consumption.

Room Thermostats and Settings

Advice on using room thermostats effectively for comfort and energy savings.

Warranty

General

Conditions necessary for maintaining the validity of the boiler's warranty.

Standard Warranty Terms and Conditions

Comprehensive details on warranty registration, service requirements, and claims.

Appendix

Product Fiche - Combination Boilers

Technical data and energy efficiency classifications for combi boilers.

Package Fiche - Boilers

Information regarding the energy efficiency of complete boiler packages.

Package Fiche - Combination Heaters (Boilers or Heat Pumps)

Energy efficiency details for combined heating systems including solar contribution.

Baxi 424 Combi 2 Specifications

General

Boiler Type	Combi
Mounting	Wall-mounted
Output	24 kW
Dimensions (HxWxD)	700 x 400 x 300 mm
Fuel Type	Natural Gas
Hot Water Flow Rate	9.8 l/min
Max. working pressure	3 bar
Central Heating Output	24 kW