Logano plus SB315, SB615, SB745 - Buderus

Technical description33.3.3 Flue gas temperatureThe flue gas temperature ϑ A is the temperature capturedinside the flue pipe, specifically at the boiler flue outlet. Itdepends on the boiler load and the heating system returntemperature.ϑ A [°C]8070605040302010Fig. 18The relevant return temperature is given for aclearer description.ϑ R [°C]000 10 20 30 40 50 60 70 80 90 100Flue gas temperatures subject to the boilerload (averages for the Logano plus SB315series)ϑ A Flue gas temperatureϑ R Return temperature (modulating operation)ϕ K Boiler loada Line for heating curve at system temperature 80/60 °Cb Line for heating curve at system temperature 50/30 °Caabb800ϑ R 30series)ϑ A7000 10 20 30 40 50 60 70 80 90 100ϕ K [%]ϑ60R6 720 642 881-18.1ilϑ A50Fig. 19 Flue gas temperatures subject to the boiler40load (averages for the Logano plus SB615ϕ K [%]6 720 642 881-17.1il2010ϑ A [°C]8070605040302010ϑ A Flue gas temperatureϑ R Return temperatureϕ K Boiler loada Line for heating curve at system temperature 80/60 °Cb Line for heating curve at system temperature 50/30 °Cϑ A[°C]80706050403020abaabbϑ Aϑ Rϑ Aϑ Rϑ Aϑ Rϑ Aϑ Rϑ R [°C]807060504030208070605040302010ϑ R[°C]1010000 10 20 30 40 50 60 70 80 90 100ϕ K[%]6 720 642 881-62.1TFig. 20Flue gas temperatures subject to the boilerload (averages for the Logano plus SB745series)ϑ A Flue gas temperature t AGϑ R Return temperature (modulating operation t R )ϕ K Boiler loada Line for heating curve at system temperature 80/60 °Cb Line for heating curve at system temperature 50/30 °CTechnical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01) 27