Flue gas temperature modulation
The continuous modulation system keeps the flue gas temperature at the set value. The electronic device checks the current flue gas temperature every 30 seconds and increases or decreases the burner output depending on whether the measured flue gas temperature is above or below the set value. The power is always reduced or increased by 3% of the current power value.
Thanks to the flue gas temperature modulation system, the flue gas temperature never exceeds 50 ° C, thus ensuring that the device keeps condensing throughout its operation while achieving an efficiency of 110% (according to LCV) throughout. This has a significantly positive effect on cutting operating costs.
To eliminate the negative effects of condensing units (i.e. low dT), we had to design a completely new flue gas / air exchanger during development. Unlike the classic air heater, the new exchanger is extended by a secondary exchanger. Thus, the exchanger in which the condensation takes place is in close proximity to the axial fan. The air stream then passes to the combustion chamber, where the air gains additional energy and is heated to the ideal temperature. As a result, the SIGMA II condensing heater always heats up perfectly.
Efficiency of 110% (according to LCV)
Such high efficiency is achieved by obtaining additional energy, which arises from the change of state during the condensation of water vapor contained in the flue gas to water. This process adds about 11% of energy with a combustion efficiency of 98.7%.