Logano plus SB315, SB615, SB745 - Buderus

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2 Basic principles2.3 Economic viability considerations2.3.1 Simplified comparison of Ecostreamboilers and gas condensing boilersFuel costs• Given– Building heat demand Q N = 375 kW– Net heating energy demand Q A = 637500 kWh/a– Design system temperatures ϑ V /ϑ R = 75/60 °C– Fuel costs K B =0.75Euro/m 3– Ecostream boiler Logano GE515,boiler size 400, η N =96%– Logano plus SB615 floor standing gas condensingboiler, boiler size 400, η N = 106 %• Sought– Fuel consumption– Fuel costs• CalculationForm. 1Calculation of annual fuel consumptionB V Annual fuel consumption in m 3 /aH i Net calorific value; here natural gas simplified with10 kWh/m 3Q A Net heating energy demand in kWh/aη N Standard seasonal efficiency in %Form. 2B VQ---------------- Aη N⋅ H iCalculation of annual fuel costsB V Annual fuel consumption in m 3 /aK B Fuel costsK Ba Annual fuel costs=K Ba= B V⋅ K B• Result– Logano GE515, boiler size 400:Fuel consumption B V = 66406 m 3 /a,Fuel costs K Ba = 46730 Euro/a– Logano SB615, boiler size 400:Fuel consumption B V = 60142 m 3 /a,Fuel costs K Ba = 42345 Euro/aHeating with the floor standing gas condensing boilerresults in savings of 4385 per year.Investment costsLogano plusExtent ofinvestment 1)2) UnitLogano GE515,boiler size400SB615,boiler size400Boiler, control unitand pressure-jet gas Euro 17570 29725burnerFlue system (approx.) Euro 2000 2000Neutralising systemNE1.1Euro N/A 775Boiler safetyequipmentEurosame price(safety valve etc.)Total investmentcostsEuro 19570 32500Table 1 Comparison of investment costs for Ecostreamboilers and floor standing gas condensingboilers (values rounded off)1) Incl. accessories, excl. installation2) Prices as of 2011/10Reflux of capitalType of cost UnitLoganoGE515, boilersize400Logano plusSB615, boilersize400Investment costs Euro 19570 32500Costs linked tocapital 1)Euro/a 2043 3393Fuel costs Euro/a 46730 42345Total costs Euro/a 48773 45849Table 2 Total costs for Ecostream boilers andfloor standing gas condensing boilers (valuesrounded off)1) Annuity 9,44 %; interest 5 %; maintenance 1 %In this example, the investment costs have been repaidafter about three years due to the lower fuel costs. Inaddition, the payback period decreases as energy pricesrise. No subsidies have been taken into account.2.4 SubsidiesSignificant subsidies are granted for floor standingcondensing boilers, and these vary in each GermanFederal State. The German Federal subsidy programmeoffers low-interest loans. Further information can be foundat www.bafa.de, for example.As a general principle, subsidies are onlygranted if the application is submitted beforethe installation or modernisation of thesystem begins.8Technical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01)
Technical description33 Technical description3.1 Logano plus SB315, SB615 and SB745 floor standing gas and oil condensingboilers3.1.1 Equipment overviewThe Logano plus SB315, SB615 and SB745 floorstanding gas and oil condensing boilers are consistentlydesigned with stainless steel heating surfaces forcondensing technology. They are tested to EN 15417and EN 15034, type-tested and CE-designated. Qualityassurance measures to DIN ISO 9001 andDIN EN 29001 contribute to the high manufacturingquality and functional reliability.The conditions for the DVGW quality markare met. Additionally, the Unit version of theLogano plus SB315 VM and Logano plus SB615 VMfloor standing gas condensing boiler with Logatop VMmodulating premix gas burner from Buderus significantlyreduces the sound emissions.The cover of the Logano plus SB615 boiler has a loadbearingcapacity of 100 kg/m 2 .Logano plus SB315The floor standing condensing boilers in this series areavailable:• With outputs of 50 kW to 115 kW (50/30 °C)• Versions:– Logano plus SB315 gas:Unit version Logano plus SB315 gas VM withLogatop VM low emissions modulating premix gasburner from Buderus for natural gas (E/LL) or LPG– Logano plus SB315 gas without burner:For the use of approved pressure-jet gas burners fornatural gas (E/LL) or LPG– Logano plus SB315 oil/gas:Unit version Logano plus SB315 oil/gas BE-A withLogatop BE-A blue flame oil burner from Buderus(boiler size 50–70),Unit version Logano plus SB315 oil/gaswith pressure-jet oil burner from Weishaupt or Riellofor low sulphur fuel oil EL and fuel oil EL A Bio 10 toDIN 51603 (boiler size 90–115)– Logano plus SB315 oil/gas without burner:For the use of approved pressure-jet oil and gasburners for low sulphur fuel oil EL and fuel oil EL ABio 10 to DIN 51603, natural gas (E/LL), LPG ordual fuel burner6 720 642 881-03.1ilFig. 4Logano plus SB315 VM floor standing gascondensing boiler with extremely quiet premixgas burner and Logamatic 4211 control unitTechnical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01) 9
Page 1 and 2: Technical guide2012/01Logano plus S
Page 3 and 4: Table of contents7 DHW heating . .
Page 5: Basic principles22 Basic principles
Page 10 and 11: 3 Technical descriptionLogano plus
Page 12 and 13: 3 Technical descriptionHot gas rout
Page 14 and 15: 3 Technical description3.1.4 Therma
Page 16 and 17: 3 Technical descriptionBoiler size
Page 22 and 23: 3 Technical description3.2.5 Specif
Page 24 and 25: 3 Technical description3.2.6 Specif
Page 26 and 27: 3 Technical description3.3 Boiler p
Page 28 and 29: 3 Technical description3.3.4 Standb
Page 30 and 31: 4 Burner4 Burner4.1 Burner selectio
Page 32 and 33: 4 Burner4.2.4 Combustion air contro
Page 34 and 35: 4 Burner4.3 Logatop BE-A blue flame
Page 36 and 37: 4 Burner4.4 Third party burners4.4.
Page 38 and 39: 5 Regulations and operating conditi
Page 48 and 49: 7 DHW heating7 DHW heating7.1 Syste
Page 50 and 51: 8 System examples8.1.3 DHW heatingG
Page 52 and 53: 8 System examples8.3 Single boiler
Page 54 and 55: 8 System examples8.4 Single boiler
Page 56 and 57: 8 System examplesSelecting control
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8 System examplesArea of applicatio
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8 System examples8.6 2-boiler syste
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8 System examplesSelecting control
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8 System examples8.8 2-boiler syste
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8 System examplesSelecting control
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9 Installation9 Installation9.1 Tra
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9 Installation1290°3x34554676 720
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9 Installation9.2 Design of install
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9 Installation9.3.2 Installation di
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9 Installation9.4 Information on in
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9 InstallationSafety component Make
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9 Installation9.6 Accessories for s
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9 Installation9.6.3 Boiler supports
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9 InstallationBoiler sizeFlue gas s
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9 Installation9.7 Further accessori
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10 Flue system10 Flue system10.1 Re
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10 Flue systemSizing the plastic fl
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Condensate drain1111.2.2 Equipment
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Condensate drain1111.2.3 Neutralisi
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Condensate drain11Neutralising syst
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Keyword indexThermal insulation....
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Logano plus SB315, SB615, SB745 - Buderus

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