To Next PageTo Next PageWhat does it mean if my Vaillant Boiler water pressure sensor signal is out of range (too high)?
If the water pressure sensor signal is out of range (too high), the cable to the water pressure sensor has a short-circuit at 5 V / 24 V, or there is an internal fault in the water pressure sensor. Inspect and repair the cable and replace the water pressure sensor.
What to do if my Vaillant ecoTEC pro 24 appliance does not start and ignition fails?
If your Vaillant Boiler fails to start and ignition attempts fail, there may be faults in the gas supply, such as a defective gas meter or gas pressure detector, air in the gas, gas flow pressure too low, or a disengaged fire protection tap. There may be faults in the gas valve, wrong gas setting, defective igniter (ignition transformer, ignition cable, ignition plug), stopped ionization current (cable, electrode), faulty earthing in the appliance or defective electronics. Inspect the gas supply and ignition components for faults.
What to do if the flame goes off during operation of my Vaillant ecoTEC pro 24 Boiler?
If the flame goes off during operation and subsequent ignition attempts fail, it could be due to a temporarily stopped gas supply or faulty earthing of the appliance. Check the gas supply and earthing connections.
Why is there a dry fire in my Vaillant Boiler?
A dry fire in your Vaillant Boiler can occur due to too little water in the appliance, a defective water pressure sensor, a defective cable to the pump or water sensor, a blocked or defective pump, or a pump output that is too low. Ensure sufficient water supply and check the pump and sensors for faults.
What to do if my Vaillant ecoTEC pro 24 detects no pressure rise on turning on the pump?
If no pressure rise was detected on turning on the pump, the water pressure sensor or/and pump may be defective, there may be air in the heating system, the quick bleeder may be defective, or there may be too little water in the appliance. Check and repair the pump and pressure sensor and ensure sufficient water.
What to do if the gas supply to my Vaillant Boiler is off?
If the gas supply to your Vaillant Boiler is off or not correctly purged, check that the gas supply to the boiler is on, that it has been correctly purged, and that an inlet pressure of 20 mbar is available at the gas valve.
What does EEPROM error mean in my Vaillant ecoTEC pro 24 Boiler?
An EEPROM error indicates that the electronics are defective. Replace the defective electronics.
What does it mean if my Vaillant ecoTEC pro 24 Boiler displays electronics/NTC fault?
An electronics/NTC fault indicates a short-circuit in the flow or return NTC, or that the electronics are defective. Check and replace the NTC or repair the electronics.
What to do if external controls of my Vaillant ecoTEC pro 24 are not calling for heat?
If your Vaillant Boiler's external controls are not on or calling for heat, check that all external controls are on and calling for heat.
Why is the safety temperature limiter by NTC activated in my Vaillant ecoTEC pro 24 Boiler?
The safety temperature limiter by NTC might be activated because the Flow-NTC is not correctly thermal-connected or is defective, causing the appliance not to shut down. Check the thermal connection of the Flow-NTC and replace it if defective.
General| Model | ecoTEC pro 24 |
|---|---|
| Category | Boiler |
| Output | 24 kW |
| Fuel Type | Natural Gas |
| Boiler Type | Combi |
| Mounting | Wall-mounted |
| ERP Rating | A |
| DHW Output | 24 kW |
| Max. working pressure | 3 bar |
| Fuel | Natural Gas |
| Warranty | 2 Years |
| Efficiency | 89.3% |
| Dimensions | 720mm x 440mm x 338mm |
Information on manual structure, liability, and related documents.
Overview of ecoTEC boiler types, their function, and models.
Boiler design for sealed systems, mounting, and flue compatibility.
Compliance with EU directives for gas appliances and EMC.
List of gas council approval numbers for different ecoTEC models.
Detailed technical specifications including output, dimensions, efficiency, and performance data.
Diagrams showing the physical dimensions and connection points of the boiler.
Diagrams illustrating the function elements of combination and system boilers.
Information on the location of the boiler's type plate.
Requirements for flue systems and installation instructions.
Lists relevant British Standards, regulations, and publications for installation.
Details the components included in the boiler's packaging.
Guidelines for selecting a suitable location for boiler installation, considering clearances and environment.
Requirements for gas supply installation, pipe sizing, and leak checks.
Information on Vaillant flue pipe systems, including standard and optional sizes.
Specifies requirements for flue terminal positioning and clearances according to standards.
Discusses air supply requirements and ventilation for cupboard installations.
Details electrical connection requirements, safety, and wiring standards.
Outlines requirements for the heating system, including circulation, filling, and pressure components.
Safety guidelines and recommendations for lifting and moving the boiler.
Specifies necessary clearances around the boiler for installation and servicing.
Guidance on choosing the optimal location for the boiler based on fluing and access.
Instructions for safely removing the boiler from its packaging.
Steps for using the wall template to mark fixing and connection points.
Instructions for marking and preparing the flue exit hole.
Guidance on securely installing the boiler's hanging bracket.
Directs users to separate instructions for flue system installation.
Steps for lifting and hanging the boiler onto the bracket.
Procedure for removing the boiler's front casing for access.
Important advice on cleansing the heating system before connecting the appliance.
Detailed instructions for making a safe and correct gas connection to the boiler.
Instructions for connecting the cold water inlet and hot water outlet pipes.
Guidance on connecting the condensate drain pipe and its requirements.
Instructions for connecting the heating flow and return pipes and the pressure relief valve.
Refers to separate instructions for flue system connection.
Comprehensive instructions for safe electrical connection, including wiring diagrams.
Lists compatible Vaillant controls and their connection methods.
Explains how to connect external controls like time switches and thermostats.
Provides a wiring diagram for connecting time switches and thermostats.
Refers to separate instructions for optional timer accessories.
Details how to connect the VR 65 control center for system integration.
Notes the boiler's compatibility with TRVs and recommends control interlocks.
Explains the boiler's integral frost protection feature and how to protect the system.
Describes the built-in circulating pump and its automatic overrun function.
Explains the control that prevents energy-wasting short cycling.
Details the APS feature that prevents pump seizure during periods of inactivity.
Specifies checks for electrical safety, continuity, and polarity.
Outlines inspection, leak testing, and purging of the gas installation.
Instructions for filling and purging the domestic hot water circuit.
Step-by-step guide for filling and bleeding the heating system.
How to check and adjust the heating system's cold fill pressure using the manometer.
Details the use of the filling loop on ecoTEC plus combination boilers.
Instructions for filling systems without a dedicated filling loop.
Comprehensive procedure for filling the heating system, including bleeding radiators.
Procedure for flushing the heating system to remove installation debris.
Instructions for filling the condensate trap to prevent fume escape.
How to adjust the pump speed for optimal heating system performance.
Guidance on adjusting the boiler's internal by-pass valve.
Procedures for checking gas inlet pressure and gas rate.
Steps for correctly refitting the boiler's front casing.
How to adjust the boiler's central heating output range.
Information on converting the appliance between natural gas and LPG.
Detailed procedures for performing essential functional checks on the appliance.
Guidance on instructing the user on operation, safety, and maintenance.
Information regarding the appliance's warranty terms and conditions.
Recommendations for regular safety inspections and maintenance checks.
Detailed steps for removing, cleaning, and refitting the burner module.
Procedure for cleaning and refilling the condensate siphon.
Instructions for checking the expansion vessel's charge pressure.
Steps to follow after maintenance to recommission the boiler.
Checks to perform after any maintenance task to ensure proper operation.
A systematic approach to diagnosing and resolving boiler faults.
Lists and explains various test programs available for diagnostics.
Procedure for restoring appliance settings to factory defaults.
Essential safety precautions before replacing any boiler components.
Step-by-step guide for replacing the boiler's burner.
Instructions for replacing the fan or gas valve assembly.
Procedure for replacing the boiler's expansion vessel.
Steps for safely removing and replacing the primary heat exchanger.
Instructions for replacing the electronic control unit and display.
Guidance on checking and adjusting the CO2 content for optimal combustion.
Guidelines for environmentally responsible disposal of the boiler and packaging.
Information on obtaining regular servicing and maintenance agreements.
Statement confirming compliance with relevant European directives.
Reference to the commissioning checklist for installers.
