To Next PageTo Next PageWhy does the flame go off during operation in my Vaillant ecoTEC plus 630 Boiler?
If the flame goes off during operation and subsequent ignition attempts fail in your Vaillant Boiler, it could be due to a temporarily stopped gas supply, spark failure in the ignition transformer, or faulty earthing of the appliance. Check gas supply and ignition system for faults.
What causes rapid temperature rise in my Vaillant ecoTEC plus 630?
A rapid temperature rise in your Vaillant Boiler, indicating a water shortage, can be caused by a blocked pump, insufficient pump output, air in the appliance, low plant pressure, or interchanged flow and return NTCs. Inspect system for air and correct pump issues.
Why is there a large temperature spread in my Vaillant Boiler?
A large temperature spread between the flow and return probe in your Vaillant Boiler, indicating a water shortage, can be caused by a blocked or defective pump, or the pump output being too low. Inspect and repair or replace the pump.
Why is my Vaillant ecoTEC plus 630 Boiler fan speed too high on start?
If your Vaillant Boiler experiences fan speed variation (too high on start), the causes may be: 1. Blocked fans 2. Plug not inserted correctly on the fan 3. Defective hall sensor 4. Fault in cable harness 5. Defective electronics Inspect fan and connections, and replace defective components.
How do I fix a broken Flow-NTC in my Vaillant Boiler?
A broken Flow-NTC in your Vaillant Boiler can be caused by a defective or broken Flow-NTC cable, or a faulty NTC. Check and replace NTC or repair cable.
What causes a broken Return-NTC in a Vaillant ecoTEC plus 630 Boiler?
A broken Return-NTC in your Vaillant Boiler can be caused by a defective or broken Return-NTC cable, or a faulty NTC. Check and replace NTC or repair cable.
What to do if there is a short circuit in the flow-NTC of my Vaillant ecoTEC plus 630?
If there is a short circuit in the flow-NTC of your Vaillant Boiler, it could be due to the NTC plug shorted to the casing or a defective NTC. Inspect and replace the NTC if defective.
Why is there a short circuit in the return-NTC of my Vaillant ecoTEC plus 630?
A short circuit in the return-NTC of your Vaillant Boiler is often due to a defective NTC. Inspect and replace the NTC if defective.
What to do if the water pressure sensor or cable harness hydraulics are defective in my Vaillant ecoTEC plus 630?
If the water pressure sensor or cable harness hydraulics are defective in your Vaillant Boiler, it could be due to a broken line to the water pressure sensor, a short-circuit at 0 V, or a defective water pressure sensor. Inspect and replace the water pressure sensor or repair the line.
What does it mean if the flow sensor reports a constant value in my Vaillant Boiler?
If the flow sensor reports a constant value in your Vaillant Boiler, it indicates that the flow sensor is defective. Replace the flow sensor.
General| Model | ecoTEC plus 630 |
|---|---|
| Category | Boiler |
| Output | 30 kW |
| Dimensions (H x W x D) | 720 x 440 x 338 mm |
| Fuel Type | Natural Gas |
| Mounting | Wall-mounted |
| ERP Rating | A |
| CH Output (kW) | 30 kW |
| Modulation | 1:5 |
| Warranty | 5 years |
| Efficiency | 94% |
| DHW Output (kW) | 30 kW |
| Flow Rate (l/min) | 12.3 l/min |
Explains manual structure, symbols, and liability for non-compliance.
Describes ecoTEC boiler types (combination and system) and their general operation.
Covers system requirements, mounting, and flue options for appliances.
Details compliance with EU directives for gas appliances and EMC.
Lists gas council approval numbers for specific ecoTEC models.
Provides detailed performance, dimension, and electrical specifications for all models.
Illustrates physical dimensions and connection points with a detailed diagram.
Shows functional elements of combination and system boilers with diagrams.
Indicates the location of the appliance's type plate.
Discusses flue system requirements and installation guidance for sealed appliances.
Lists relevant standards, regulations, and documents for installation.
Details the items provided with the boiler package.
Specifies requirements for boiler location, clearances, and room conditions.
Covers requirements for gas supply, meter connection, and pipework.
Details Vaillant's certified flue pipes and system options.
Provides detailed guidelines and clearances for flue terminal positions.
Addresses air supply requirements, noting no specific vents needed for high-efficiency appliances.
Outlines electrical connection requirements, safety, and supply details.
Covers water circulation, filling, pressure, and expansion vessel requirements.
Provides safety recommendations and procedures for lifting and moving the boiler.
Specifies minimum clearances around the boiler for installation and servicing.
Details how to mark and prepare the flue exit hole.
Instructions for securely fitting the boiler mounting bracket.
Refers to separate instructions for installing the air/flue duct.
Guides on lifting and mounting the boiler onto the hanging bracket.
Explains how to safely remove the boiler's front casing.
Important advice on cleansing the heating system before appliance connection.
Details the procedure and safety precautions for connecting the gas supply.
Explains the connection of water pipes for combination boilers.
Describes the installation and requirements for the condensate drain pipe.
Outlines the procedure for connecting the heating flow and return pipes.
Refers to separate instructions for connecting the flue system.
Covers general requirements and safety for electrical connections.
Details Vaillant controls, external controls, and connection methods.
Details essential electrical safety checks before commissioning.
Covers inspection, leak testing, and purging of the gas installation.
Explains how to fill and purge the domestic hot water system.
Provides detailed steps for filling and bleeding the central heating system.
Instructions for flushing the system to remove installation debris.
Explains how to clean and refill the condensate siphon.
Details how to adjust the pump speed for ecoTEC plus boilers.
Explains how to adjust the boiler's internal bypass valve.
Covers checking gas inlet pressure and gas rate.
Instructions for correctly refitting the boiler's front casing.
Outlines the procedure for performing functional checks after installation.
Lists essential checks like gas supply, flue system, and burner operation.
Describes how to check the heating operation and status displays.
Details how to check domestic hot water operation and status.
Instructions for performing a hot flush after system filling.
Guidance on instructing the user on operation, safety, and maintenance.
Recommends regular inspection and servicing for safe operation.
Emphasizes safety precautions before starting any maintenance work.
Outlines general maintenance tasks and initial system checks.
A table summarizing annual inspection and maintenance activities.
Details the process of removing and servicing the burner module.
Step-by-step guide to safely remove the burner module.
Instructions for cleaning the condensation heat exchanger.
Explains how to clean and refill the condensate siphon.
Describes how to check the expansion vessel's charge pressure.
Outlines steps for recommissioning after maintenance.
Lists checks to perform after completing any maintenance task.
Provides a systematic approach to diagnosing boiler faults.
Explains the meaning of various status codes displayed by the boiler.
Details how to access and interpret diagnostic codes for deeper analysis.
Lists fault codes and their potential causes for troubleshooting.
Explains how to access and clear stored fault codes.
Describes various test programs available for appliance functions.
Explains how to reset boiler parameters to factory default settings.
Crucial safety warnings and precautions before replacing any component.
Step-by-step guide for replacing the burner module.
Instructions for safely replacing the fan or gas valve components.
Details the procedure for replacing the expansion vessel.
Provides guidance on safely replacing the primary heat exchanger.
Explains how to replace the electronic control unit and display.
Details how to check and adjust CO2 levels for optimal combustion.
Official document confirming compliance with EU directives.
