Logano plus SB315, SB615, SB745 - Buderus

Regulations and operating conditions55.7.5 Application limits for boilers made from ferrous materialsV max (m 3 )1210128364546200 5 10 15 20 25 30H W (°dH)6 720 642 881-66.1TFig. 31Boilers ≥ 50 kW to 150 kW made from ferrous materialsH W water hardnessV Water volume over the service life of the boiler1 Boilers up to 150 kW2 Boilers up to 130 kW3 Boilers up to 110 kW4 Boilers up to 90 kW5 Boilers up to 70 kW6 Boilers up to 50 kWMeasures are required above these outputcurves; fill with untreated tap water below thecurves. In multi-boiler systems (< 600 kWtotal boiler output) the output curves for thesmallest single boiler apply.ExampleGiven:• Boiler output Q =105kW• System volume V A =approx. 1.1m 3Result:• At a water hardness level of 22°dH, the maximumamount of fill and top-up water is approx. 1.8 m 3 .• This system can be filled with untreated tap water.Suitable measures for boilers made fromferrous materials are full desalination and fullsoftening ( current Buderus catalogue forlarge heat sources/applications andcatalogue for service department).Technical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01) 43