VIESSMANN Vitocrossal 300, type CU3A

Gas condensing boiler with MatriX radiant burner.

• Annual space heating energy efficiency up to 94% (Hs) (Label A)
• Inox-Crossal heat exchanger surface made of stainless steel for efficient use of the condensing value - self-cleaning effect thanks to smooth stainless steel surfaces
• Modulating MatriX gas burner with a large modulation range down to 20% for particularly low-noise, economical and environmentally friendly operation
• Lambda Pro Control combustion control for all types of gas - Fee savings by extending the inspection intervals to 3 years
• Good controllability and safe transfer of heat through wide water walls and large water content
• Easy-to-use Vitotronic control unit with plain text and graphic display
• Room air independent or room air dependent operation
• Internet-enabled with Vitoconnect (accessory) for operation and service via the Viessmann app

Boiler with vertically arranged Inox-Crossal heating surfaces made of stainless steel, for continuously lowered boiler water temperature. Suitable for room air dependent and room air independent operation. Extremely low pollutant emissions thanks to the modulating MatriX gas burner. Large water content for low cycles and direct connection of large heating circuits. Boiler body thermally insulated on all sides with highly effective compound thermal insulation. Easy and time-saving assembly of the boiler cladding without special tools with the Fastfix assembly system. Boiler cladding made of sheet steel, coated with epoxy resin, color vito silver.

With weather-compensated boiler and heating circuit control unit Vitotronic 200 (type KW6B) for operation with modulating boiler water temperature. For heating systems with a directly connected heating circuit (without mixer) and/or in connection with an extension set for one or two heating circuit(s) with mixer. Periods for the heating circuits, DHW heating and circulation pump can be set separately. Simple commissioning thanks to the Plug and Work function, automatic function for adjusting the time programs for drinking water heating and the circulation pump. With storage tank temperature control, automatic summer/winter time changeover, integrated diagnosis system, maintenance notification and controlled screed drying. With outdoor and storage tank temperature sensor. Boiler temperature sensor is installed in the boiler. External devices are connected via Rast 5 system plugs. The Vitotronic 200 contains: System switch, electronic maximum temperature limiter, temperature monitor and temperature limiter, operating and fault display, Optolink laptop interface and removable control panel, settings for operating modes, party and economy mode, holiday program, chimney sweep test, demand-dependent heating circuit pump and burner shutdown as well as summer economy circuit and variable heating limit. Possibility to set room temperature and drinking water temperature and query temperatures. Simple operation using a graphic display with plain text support, large font and high-contrast black/white display as well as context-related help. Remote control optionally via ViCare or ViGuide in connection with Vitoconnect (accessories) and on-site internet access.

Capable of communication via LON BUS (LON communication module, accessories required) with:

• Vitotronic 200-H heating circuit controls
• Vitogate 200, type KNX capable of communication with higher-level control systems

Connection for external heating program changeover with an effect on one or more heating circuits, external request, external blocking and specification of the target boiler water temperature via an external 0-10 V signal (with extension, accessories, possible).

In connection with the solar control module (type SM1, accessory) solar drinking water heating and solar heating support. Display of the solar yield and the operating status of the solar system on the Vitotronic controller. A collector temperature sensor and a storage tank temperature sensor are included in the scope of delivery.

Scope of delivery/Equipment:

Boiler body with separately packaged MatriX gas burner for natural and liquid gas, thermal insulation and Vitotronic 200 boiler circuit control unit, type KW6B