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Type M343, oil/gas-fired low pressure hot water boiler that can bes used as a low temperature boiler.

Rated output: 1.86 to 5.9 MW.
Permissible operating pressure: 6 bar.
Permissible flow temperature: 110/120 °C

The Vitomax 300-LT is a low pressure hot water boiler that can be used as low temperature boiler. One typical application would be an apartment block where the system is operated in modulating mode, subject to outside temperature.

The Vitomax 300-LT benefits at a glance:

• High operational reliability and a long service life through multi-layered convection heating surfaces made from Duplex pipes
• Low energy consumption due to modulating boiler water temperature. Standard efficiency: 96 % (Hi). Standard efficiency improved by up to 10% through condensing technology with Vitotrans 300 stainless steel flue gas/water heat exchanger
• Low minimum return temperature of  38 °C when using fuel oil and 45 °C when using gas
• No minimum heating water flow rate required – wide water galleries and large water content provide excellent natural circulation and a reliable heat transfer – simplified hydraulic connection
• No additional intermediate flow piece required. All necessary connections for a safety temperature of 110 ºC are already fitted to the boiler
• Low pressure drop on the hot gas side through convection heating surfaces with
  generously sized hot gas pipes
• Low radiation losses through 120 mm thick composite insulation as well as water-cooled front and rear reversing chambers
• Three-pass boiler with low combustion chamber loading (1.2 MW/m3) – clean combustion with low nitrogen oxide emissions
• High level of serviceability through large cleaning door
• Load-bearing cover on top of the boiler as part of the standard delivery – this simplifies installation and maintenance
• Economical and safe operation of heating systems through the digital Vitotronic control system with communication capability. Standardised LON BUS for optional complete integration into building management systems
• Approval in accordance with the European Pressure Equipment Directive 97/23/EC or the Gas Equipment Directive 90/396/EEC