Vaillant VU 246/5-3 ecoTEC pro
Code: 0010021896Related products
Product detailed description
Vaillant VU 246/5-3 ecoTEC pro
- wall-hung condensing boiler with the option to connect an external cylinder
- output: 6,9 - 25,5 kW
- standardised gas efficiency rating: 108 %
- modulation: 1:7
- heating and hot water preparation
- designed for underfloor and radiator heating
- space-saving - the boilers feature compact dimensions
- can be installed in attic spaces
- operation independent of, or dependent on, the room volume (combustion air supply)
- Aqua-Power Plus function up to 21% higher output for hot water preparation
- NOx value in flue gas pod 60 mg/m3
- standardised efficiency rating 109 %
- continuous output modulation
- simple backlit display with symbols
- Thermo-Compact module fitted with a stainless steel burner and fan
- automatic diagnostic system (digital display of operating states and analysis of the boiler mode)
- the heating system can be prepared before the boiler itself is installed
- ready for connection of a storage water heater
- the VU boiler already includes an built-in diverter valve
- reduced electricity consumption
- two-stage, energy-efficient circulation pump
- expansion vessel
- automatic air vent
- condensate drain (siphon)
- integral stainless-steel condensing heat exchanger
- built-in control for an indirectly heated cylinder
- electronic setting of reduced heating output
- built-in composite three-way diverter valve
Parameters
Frequently asked questions
- How exactly do I choose the output of a VAILLANT condensing boiler? The starting point is the calculated heat loss of the building being heated (most reliably taken from the project documentation or an energy certificate). If you don't have a project, you can roughly estimate 60-100 W per m² of floor area for a normally insulated house built after 2000, or 100-150 W/m² for an older, uninsulated house - the exact figure varies depending on the number of floors, ceiling height, the number and quality of windows, and the building's orientation. An oversized boiler switches on and off more often (so-called cycling), which shortens its lifespan and reduces efficiency; an undersized boiler, on the other hand, cannot heat the house sufficiently on frosty days.
- Why is a condensing boiler more economical than a conventional one? A condensing boiler also makes use of the heat hidden in the water vapour produced when gas is burned - in a conventional boiler this vapour escapes unused through the flue, while in a condensing boiler it is cooled below the so-called dew point, the vapour condenses, and the released heat is returned to the heating circuit. Thanks to this, condensing boilers achieve an efficiency of roughly 105-110% relative to the calorific value of the gas, compared to the usual 85-92% for conventional boilers.
- What type of flue gas exhaust does this boiler need? Most modern condensing boilers are so-called turbo boilers (with a sealed combustion chamber) and require a concentric (coaxial) or separate flue gas exhaust and combustion air intake routed through an external wall or the roof - so a functional chimney is not required. You will find the exact type and maximum length of the flue (based on a diameter of 60/100 or 80/125 mm) in the technical documentation for the specific model, or you can consult our customer service.
- What does the ErP energy class shown for the boiler mean? This is the mandatory efficiency label for heating appliances under the EU ErP (Ecodesign) directive, similar to the energy labels on refrigerators. Condensing boilers commonly achieve class A, or even higher in combination with room controls (e.g. A+ when using weather-compensated control and a room thermostat).
- Can I install and connect this boiler myself? No. Connecting to the natural gas supply, the electrical network and the flue gas exhaust must, by law, be carried out exclusively by a person with the relevant qualification (most often an authorised service technician of the given brand or a gas appliance inspection technician). After installation, the boiler must be commissioned by the manufacturer's authorised service, which is usually also a condition for the warranty to be valid.
- What about servicing and the warranty? Most manufacturers require a regular annual service inspection by an authorised service provider so that the warranty remains valid even after its standard expiry (an extended warranty subject to regular servicing is common especially for the Vaillant, Protherm and Viessmann brands). You will find the exact warranty terms in the warranty certificate supplied with the boiler.
- What is included in the delivery of this specific product? The exact contents of the package (the boiler itself, possibly a hot water tank, room controls and other accessories in the case of a set) are stated in the product name and in its technical parameters above on this page.
Additional parameters
| Category: | Vaillant |
|---|---|
| Warranty: | 2 years |
| Weight: | 60 kg |
| EAN: | 4024074904251 |
| Automatic diagnostic system: | yes |
| Safety thermostat: | yes |
| CE number: | 1312BV5392 |
| Included accessories: | power cable, siphon, manual, warranty card |
| Electrical class: | I |
| Electrical protection rating: | IPX4D |
| Electronic ignition: | Yes |
| Electronics: | eBus 2.0 (from 2014 version) |
| ? Expansion vessel: | 8-litre |
| Expansion tank: | 2 l |
| Weight of empty boiler: | 37 kg |
| Flue gas CO value: | 98 ppm / 105 mg/kWh |
| Flue gas CO2 value: | 105 % |
| Upper boiler output: | 25,5 kW |
| Current intensity: | 0,75 A |
| Country of origin: | EU |
| Summer mode: | Yes |
| Maximum working pressure: | 300 kPa |
| Maximum DHW pressure: | 1 mPa |
| Condensate quantity: | 1,7 l/hod |
| Two-point control option: | no |
| Pump output adjustment option: | Yes |
| Option to convert to LPG: | Yes |
| Option to operate without a thermostat: | Yes |
| Option to connect a wireless thermostat: | Yes |
| Option to connect solar: | no |
| Storage tank connection option: | no |
| Extended warranty option: | yes |
| Boiler output adjustment option: | yes |
| Gas supply pressure: | 20 mbar/ 0,002 MPa, 37 mbar/ 0,0037 MPa |
| Voltage/frequency: | 230V/50Hz |
| Adjustable DHW temperature range: | 45 - 65 °C |
| Adjustable heating water temperature range: | 10 - 80 °C |
| Standard efficiency rate at 40/30°C: | max. 108,4 % |
| Recommended heating filter: | Total filter 3/4" |
| Recommended controller: | Vaillant calormatic 450 |
| Recommended solar set: | HEWALEX |
| Fuel: | natural gas / propane |
| Fuse: | 2 A |
| Flue design: | TURBO |
| Power output curve: | modulated |
| Power input: | 178 W |
| Electrical voltage connection: | 230V |
| Concentric flue connection: | yes |
| Separate flue connection: | yes |
| DHW connection port: | 1/2" |
| Water connection port: | 3/4" |
| Propane G31 - gas flow at maximum output in DHW mode: | 1,98 kg/h |
| Propane G31 - gas flow at maximum output in heating mode: | 1,44 kg/h |
| Propane G31 - gas flow at minimum output: | 0,40 kg/h |
| Dimensions: | 720 x 440 x 338 mm |
| Lower boiler output: | 6,9 kW |
| Boiler commissioning: | by a VAILLANT service technician |
| Specific DHW flow rate: | 15 l/min |
| Boiler intended use: | with the option to connect a storage tank |
| Weighted NOx value: | 22,0 ppm / 39,9 mg/kWh |
| Permanent pilot flame: | no |
| Suitable for underfloor heating: | yes |
| Output when heating DHW: | 24 kW |
| Output at temperature drop 50/30°C: | 6,9 - 25,5 kW |
| Output at temperature drop 80/60°C: | 6,2 - 24 kW |
| DHW output: | 28 kW |
| Built-in water filter: | no |
| Natural gas G20 - gas flow at maximum output in DHW mode: | 2,70 m3/h |
| Natural gas G20 - gas flow at maximum output in heating mode: | 1,96 m3/h |
| Natural gas G20 - gas flow at minimum output: | 0,54 m3/h |
| Boiler heating output: | high output above 16 kW |
| Manufacturer: | Vaillant |
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About the company
The Vaillant Group is synonymous with heating and hot water preparation, placing particular emphasis on quality, reliability and user comfort. Its heating technology products are present in more than 100 countries around the world. The group unites the brands Vaillant, Saunier Duval, AWB, Bulex, DemirDöküm, Glow worm, Hermann Saunier Duval and Protherm. Each of these brands has extensive experience in the production of heating equipment, as most of them have been active in this segment for more than 80 years. With its 140 years of market presence, the brand Vaillant is among the largest and most significant. It has long been a market leader and a pioneer in the development and innovation of heating technologies in Europe. The Vaillant Group has an extensive network of sales representatives and thousands of satisfied customers around the world.
The extensive portfolio of the Vaillant Group includes modern heating technologies that are energy-saving, efficient and contribute to environmental protection. Thanks to a wide range of products and models, every customer can find exactly what they need here. The range includes wall-hung and floor-standing boilers, hot water storage tanks or electrical appliances. In the market of wall-hung boilers, the company is even number one in Europe with a 26 percent market share. The Vaillant Group is not specialized only in the development and production of boilers; its product portfolio also includes technologies that use renewable energy sources, such as solar systems or the most modern heat pumps and air conditioners. It also offers recovery or cogeneration units or zeolite heat pumps to users.
Vaillant Group thinks ahead every day and offers individual solutions for every need and type of energy. Its success is also based on research and development, which always takes place in line with the wishes of customers. The company's research and development department is among the largest and above all the most creative departments in this segment. The team of developers is constantly working on new devices and technological systems that are increasingly easy to operate and already meet the demands of tomorrow. Whether it is about energy solutions of the future or about the best way to use fossil fuels, the company Vaillant Group tries to anticipate new trends and to be always one step ahead of others. Proof of this is the registration of up to 100 new patents every year. In the field of production, the company places the greatest emphasis on achieving the highest quality of boilers, which represents perfection in every detail.
The Vaillant Group has its presence in most countries of the world. Slovakia is no exception, where the company Vaillant Group Slovakia, s. r. o. is located, representing the brands Vaillant and Protherm. Heating equipment of the Vaillant Group is produced in seven production plants, two of which are located on our territory. These factories employ more than 1,300 people in total. The production plant Protherm Production with its headquarters in Skalice specializes in the production of electric and floor-standing boilers for all brands belonging to the Vaillant Group. It can also boast its own research and development center, which is among the most modern in Europe. The second production plant in Slovakia is Vaillant Industrial Slovakia in Trenčianske Stankovce, which produces modules for wall-hung boilers for the entire group.
History of the company Vaillant
The history of the company Vaillant goes back to the year 1874, when it was founded by Johann Vaillant in Remscheid, Germany. Since then, the company Vaillant has been a leader in the field of heating and ventilation technologies.
History of the company Vaillant
1874 Plumber Johann Vaillant founded the company.
1894 Patented for the invention of a gas water heater with a "closed system" design.
1899 Registered company logo, the Easter Bunny.
1905 Development of a wall-mounted water heater, patented under the designation "Geyser".
1924 Development of a wall-mounted boiler for heating.
1955 Production of the millionth appliance after the end of the Second World War.
1960 Production of electrical appliances begins.
1967 Development of a combined wall-mounted boiler.
1974 11 million appliances sold since 1974.
1992 Establishment of subsidiary companies – in the Czechoslovak Republic, Hungary, Poland and Turkey.
1993 Separation of Czechoslovakia leads to the creation of a separate sales representation in Slovakia.
1999 Anniversary, 125th anniversary of the founding of the company, 40 million appliances sold in the entire history of the company.
2001 The Vaillant Group is formed, covering eight significant manufacturers of heating equipment in Europe, including the boiler manufacturer Protherm in Slovakia.
2003 The Vaillant Group production plant in Skalice specializes in the production of floor-standing boilers also for other brands belonging to the VG group.
2004 Vaillant Group opens a new production plant in Trenčín, Slovakia, for the production of hydraulic groups for wall-hung boilers.
2009 10,000,000 modules for heating equipment produced at the VG Trenčín plant.
Easter Bunny in the logo - intended for the success of the company
Pink dwarfs and cute animals stand around and admire the miracle of the egg. Johann Vaillant is fascinated by the scene and decides to buy both the picture and the copyright. For Vaillant, this means the establishment of its brand and an extremely successful story.
Very distinctive brand profile
Since 1899, the motif has adorned all products, catalogs and brochures. In a few short years, Vaillant built an excellent reputation that spread throughout Germany and even beyond its borders. Vaillant gave its logo clear lines and outlines. "The Bunny in the Egg" remains the central theme, but the word "Vaillant" is added.
Many Germans know that the Vaillant Bunny belongs to a company based in North Rhine-Westphalia. Moreover: more than 70% of all Germans have heard of the company Vaillant. In Austria and the Netherlands, the company achieves similar results for its image.
Sustainability
As a forward-looking, family-owned company, we accept special responsibility for the environment, for our employees and for society. We are convinced that economic success, sustainable and profitable growth are inseparably linked to a commitment to social and ecological standards.
In order to fulfill this commitment, we are committed to carrying out our activities in a sustainable manner within the strategic S.E.E.D.S. Program (Sustainability in Environment, Employees, Development & Products and Society). The definition of these areas of interest is based on a comprehensive understanding of sustainability, in which we also take into account key issues of our core activities.
