Viessmann Vitodens 300 Gas Fired Condensing Boiler
Datasheet and Installation Information
Product Overview
The Viessmann Vitodens 300 is a gas-fired, wall-mounted condensing boiler featuring a modulating MatriX-compact gas burner. It is designed for open or balanced flue operation and is suitable for natural gas and LPG.
Key features include high efficiency (up to 109% standard efficiency), a stainless steel Inox-Radial heating surface for reliability and longevity, and a modulation range of 1:4 for energy savings and reduced emissions. The boiler is designed for quiet operation and ease of installation, maintenance, and servicing.
Key Benefits
- Gas-fired condensing boiler, wall-mounted, available in models from 4.5 to 66 kW (up to 264 kW as a multi-boiler system).
- High standard efficiency up to 109%.
- Stainless steel Inox-Radial heating surface for high operational reliability and long service life.
- MatriX-compact gas burner with a 1:4 modulation range.
- Low emissions, performing significantly better than the 'Blue Angel' environmental standard.
- Low power consumption due to governed AC fan and heating circuit pump.
- For combi boiler versions, a high DHW convenience is provided by the integrated DHW Quick-System and comfort control for instant hot water at a constant temperature.
- Vitotronic control units offer weather-compensated or room temperature-dependent operation with integral diagnostic systems and Optolink interface.
- Easy installation, maintenance, and servicing due to modular design and generous wiring chambers.
- Automatic flue gas adaptation ensures permanently high efficiency.
- Quiet operation.
- Space-saving design.
- Flexible connections allow for easy replacement of alternative makes.
Technical Specifications
Detailed specifications are provided for various models, including rated output ranges, thermal load, gas supply pressure, power consumption, weight, dimensions, connections, and flue gas values. These are presented in tabular format across multiple pages.
Example Specification Table Snippet (for Gas Fired Boiler):
| Specification | Unit | 4.5-12.0/16.0 | 6.6-26.0 | 8.7-35.0 | 12.2-49.0 | 16.6-66.0 |
|---|---|---|---|---|---|---|
| Rated output range (TV/TR=50/30°C) | kW | 4.5-12.0/16.0 | 6.6-26.0 | 8.7-35.0 | 12.2-49.0 | 16.6-66.0 |
| Rated thermal load | kW | 4.2-16.7 | 6.3-24.7 | 8.3-33.3 | 11.5-46.3 | 15.6-62.2 |
| Max. power consumption | W | 120 | 120 | 85 | 85 | 120 |
Installation Information
The document provides detailed guidance on installation, including:
- Positioning: Recommendations on avoiding areas with air pollution, dust, high humidity, and ensuring good ventilation. Specific considerations for rooms with halogenated hydrocarbon contamination are outlined.
- Flue Gas Systems: Information on approved flue pipes, including Viessmann's own balanced flue systems and requirements for open flue operation.
- Installation on Walls: Instructions for installation on finished and unfinished walls, with and without DHW cylinders, including the use of installation templates and mounting frames. Diagrams illustrate connection points and clearances.
- Multi-Boiler Systems: Guidance on configuring multi-boiler systems, including the use of the Vitotronic 333 cascade control unit.
- Electrical Connection: Requirements for mains power connection, protection, and connection of accessories. Cable types and routing are specified.
Control Units and Accessories
The document details various control units and accessories available for the Vitodens 300 series:
- Vitotronic 100 (HC1): For constant temperature operation.
- Vitotronic 200 (HO1): For weather-compensated mode.
- Vitotronic 333 (MW2): Cascade control unit for multi-boiler systems.
- Vitotrol 100/200/300: Room thermostats and remote controls.
- Accessories: Including extension kits, sensors (cylinder temperature, immersion, outside temperature), KM BUS distributors, neutralising systems, drain funnel kits, pressure reducers, and various fittings.
Diagrams and Illustrations
The document includes numerous diagrams and illustrations to aid understanding of the boiler's construction, installation procedures, connection diagrams, and dimensional drawings. These visuals are described in detail within the text.
Safety and Compliance
Emphasis is placed on adhering to local electricity supply company requirements and VDE regulations. Safety equipment such as safety valves and low water indicators are mentioned. CE designation in accordance with current EC Directives is noted.
