6 Instructions for installation and servicing ecoTEC2 Boiler specifications2.1 Technical dataTechnical dataecoTEC plus ecoTEC pro28 Units824 831CH heat output range80 °C flow/60 °C return60 °C flow/40 °C return50 °C flow/30 °C return40 °C flow/30 °C return6.0 – 18.06.1 – 18.66.3 – 19.16.5 – 19.58.7 – 24.09.0 – 24.79.3 – 25.59.4 – 26.08.7 – 24.09.0 – 24.79.3 – 25.59.4 – 26.0kWkWkWkWDrinking water capacity 23.0 31.0 28.0 kWMaximum DHW output 23.5 31.6 28.6 kWMaximum output for heating 18.4 24.5 24.5 kWMinimum output 6.1 8.9 8.9 kWCategory II2H3PSEDBUK Band A A A BandInlet gas working pressure required (G20, natural gas) 20 mbarInlet gas working pressure required (G31, Propane) 37 mbarConnected load (if needed, related to stored charge/water heating) at 15 °C and 1013 mbarG20: 1.9G31: 1.43G20: 3.3G31: 2.45G20: 3.0G31: 2.22m 3/hkg/hExhaust mass rateat minimum thermal load (40 °C flow/30 °C return)at maximum thermal load (80 °C flow/60 °C return)2.88.34.114.24.112.9g/sg/sExhaust temperatureat minimum thermal load (40 °C flow/30 °C return)at maximum thermal load (80 °C flow/60 °C return)4070°C°CNOx class 5Protection class IP X4Dmax. flow temperature 85 °CAdjustable flow temperatureDefault setting: max. 75 °C 40 – 85 °CPermitted total overpressure 3.0 barCirculation water volume (∆T=20 K) 774 1032 1032 l/hApprox. condensation volumeat 40 °C flow/30 °C return heating 1.7 2.2 2.2 l/hPump delivery height 250 mbarMinimum DHW volume 1.5 1.5 1.5 l/minHot water volume (∆T=30 K) 11.0 14.8 13.4 l/minPermitted overpressure 10 barRequired connecting pressure 0.35 barHot water discharge temperature range 35 – 65 °CExhaust flue 60/100 mm10 l expansion vessel pre-charge pressure 0.75 0.75 0.75 barMaximum CH system pressure 2.5 2.5 2.5 barConnections heating flow/return 3/4“ 3/4“ 3/4“Gas inlet 15 15 15 mmPressure relief discharge pipework (min.) 15 15 15 mmCondensate drain (min. internal drain) 19 19 19 mmWeight (boiler only) 36 37 37 kgPrimary water content 1.9 2.3 2.1 lElectrical supply voltage 230/50 230/50 230/50 V ~/HzInternal fuse (slow) main voltage 2 APower input min.max.at 30 % efficiency7013065WWWTable 2.1 Technical data plus 800 and pro series2 Boiler specifications