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General| Mounting | Wall-mounted |
|---|---|
| Type | Combi Boiler |
| Fuel Type | Natural Gas |
| DHW Flow Rate | Up to 14.3 l/min (depending on model) |
| Dimensions (H x W x D) | 720 mm x 440 mm x 338 mm (varies by model) |
| Heating Capacity | Up to 35 kW (depending on model) |
| Warranty | 2-5 years (depending on installer and registration) |
| Heating Output | 35kW (depending on model) |
Guidance on keeping installation instructions and related documents safe for the system operator.
Explanation of symbols indicating useful tips, information, and required actions within the manual.
Specifies the valid article numbers for which these installation instructions are intended.
Information on locating and understanding the boiler's identification plate and serial number.
Explanation of the CE label indicating product compliance with applicable directives.
Vaillant's support for the Benchmark Initiative for domestic heating system standards.
Details on different ecoTEC unit types, designated countries, and approval categories.
General safety instructions and warning notes to be observed before performing actions.
Defines the proper application of the Vaillant ecoTEC boilers and cautions against improper use.
Essential safety guidelines that must always be followed during installation and operation.
Overview of general requirements, including related documents and legal regulations for safe installation.
Detailed identification and description of the functional components of the VU system boiler.
Detailed identification and description of the functional components of the VUW combination boiler.
Information on available optional accessories for controlling and integrating the ecoTEC boiler.
Details of the items included with the Vaillant ecoTEC boiler upon delivery.
Recommendations and safety guidelines for safely transporting the boiler unit.
Specifications for the installation site, including clearances and environmental considerations.
Technical drawings showing dimensions and connection points for boiler installation.
Step-by-step instructions for securely mounting the boiler onto a wall.
Procedure for safely removing and reattaching the front casing of the boiler.
Instructions for removing and refitting the side panel for access during installation or maintenance.
Essential safety and regulatory steps to take before connecting the gas supply.
Detailed instructions on how to properly connect the gas supply pipe to the boiler.
Safety precautions and system preparation before commencing hydraulic connections.
Procedure for connecting the domestic hot and cold water supply to VUW boiler models.
Guidance on integrating a domestic hot water cylinder with the ecoTEC boiler.
Instructions for making the heating flow and return pipe connections to the boiler.
Information on installing a low loss header for system hydraulic separation and pump protection.
Guidelines for safely connecting and routing the condensate discharge pipework.
Instructions for connecting the discharge pipe for the boiler's expansion relief valve.
Information on approved air/flue gas duct systems and their importance for safety and performance.
Details on the scope of delivery for vertical air/flue gas ducting systems.
Details on the scope of delivery for horizontal air/flue gas ducting systems.
Further information on the delivery scope for vertical air/flue gas ducting, including diagrams.
Regulations and recommendations for the correct termination of air/flue gas ducts.
Specific guidance on terminating air/flue gas ducts under balconies or eaves to prevent issues.
Crucial safety steps before starting any electrical work on the boiler.
Instructions for safely opening and closing the boiler's electronics box.
Critical safety procedures for connecting the boiler to the main power supply.
Guidance on connecting various controllers and electronic systems to the boiler.
Instructions for connecting multi-functional modules and other accessories via eBUS.
Schematic diagrams illustrating the electrical connections for the boiler's components.
Explanation of the boiler's display interface and available read-off and setting functions.
Procedure for accessing the installer level for advanced settings and diagnostics.
Initial steps for powering on the boiler before commissioning procedures.
Guide to using test programs for boiler commissioning and function checks.
Instructions and specifications for preparing the heating water before filling the system.
How to read and interpret the heating system's filling pressure via the boiler's display.
Critical steps for filling and purging the heating system to ensure proper operation.
Measures to prevent damage caused by low water pressure in the heating installation.
Procedure for filling and purging the domestic hot water system.
Essential step to fill the condensate trap to prevent flue gas escape.
Specific conversion steps for adapting the boiler to gas types used on the Channel Islands.
Procedure for adjusting the boiler's gas ratio settings for Channel Islands gas supply.
Checking the integrity of the flue gas installation and for potential recirculation.
Procedure to measure and verify the gas flow rate for correct boiler performance.
Comprehensive tests to verify all boiler functions after installation and settings.
Final system flush after heating the installation to remove contaminants.
Guide to diagnostic codes for adapting boiler parameters to specific heating system needs.
Instructions and safety information to provide to the end-user upon completion of installation.
Guidelines on the frequency and scope of required inspections and maintenance tasks.
Fundamental instructions for performing inspections and maintenance safely and effectively.
Critical safety precautions to be followed before, during, and after maintenance work.
Procedures for checking and adjusting CO/CO2 ratios for safe combustion performance.
Steps to adjust the CO2 concentration or air ratio for optimal combustion.
A systematic list of inspection and maintenance tasks, categorized by frequency.
Maintenance steps for filling the boiler and heating installation.
Procedures for safely draining the boiler and the entire heating installation.
Detailed tasks for performing maintenance on boiler components.
Procedure to check the gas inlet pressure for correct boiler operation.
Procedure to measure and verify the CO2 content for combustion analysis.
Contact information and advice for seeking professional assistance with boiler faults.
Guide to using the boiler's diagnostic system to identify operational status and faults.
How to access and interpret the live monitor display for current boiler operating status.
A comprehensive list of status codes and their meanings displayed by the boiler.
Information on service messages indicated by the maintenance symbol on the boiler display.
How to access different diagnosis levels to view and modify boiler parameters.
Procedure for identifying and interpreting fault codes displayed by the boiler.
How to access and review the boiler's historical record of the last ten faults.
Instructions for clearing the entire list of recorded fault codes.
A detailed table listing fault codes, their meanings, and potential causes.
Using test programs to trigger special functions for diagnostic purposes.
Procedure to reset all adjustable boiler parameters back to their default factory settings.
Essential safety steps and procedures before and after replacing boiler components.
Step-by-step instructions for removing and installing a new boiler burner.
Procedure for replacing the fan unit or the gas valve assembly.
Instructions for safely removing and installing a new expansion vessel.
Detailed steps for removing and installing a new heat exchanger unit.
Instructions for replacing the printed circuit board (PCB) or the display unit.
Procedure for safely shutting down the boiler temporarily, considering frost protection.
Steps for permanently disabling and isolating the boiler from the system.
Guidelines for environmentally responsible disposal of the boiler unit.
Details on the one-year guarantee for ecoTEC appliances and registration process.
Information on contacting Vaillant Service for regular servicing and support.
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