Logano plus SB315, SB615, SB745 - Buderus

System examples88.2.4 Arrangement of safety components to DIN EN 12828; operating temperature ≤ 105 °C;shutdown temperature (high limit safety cut-out) ≤ 110 °CBoiler ≤ 300 kW; operating temperature ≤ 105 °C;shutdown temperature (high limit safety cut-out)≤ 110 °C – direct heatingBoiler > 300 kW; operating temperature ≤ 105 °C;shutdown temperature (high limit safety cut-out)≤ 110 °C – direct heatingVKVK226/7113 1) 14 1)5 1)15101380,5 %6/7114 1)5 1)15109P13≤ 300 kW1> 300 kW12 1314 15 162 131712 133 1) 6 720 640 417-14.1il14 15 162 1317RKRK6 720 640 417-13.1ilFig. 34 Safety equipment to DIN-EN 12828 for boilers≤ 300 kW with high limit safety cut-out (STB)≤ 110 °CThe schematic diagrams show the safety equipment toDIN EN 12828 for the system versions referred to here –with no claim to completeness. Practical implementationis subject to currently applicable technical rules.Fig. 35Safety equipment to DIN-EN 12828 for boilers> 300 kW with high limit safety cut-out (STB)≤ 110 °CKey to fig. 34 and fig. 35:RK ReturnVK Flow1 Heat source2 Shut-off valve, flow/return3 Temperature controller (TR)4 High limit safety cut-out (STB)5 Temperature capturing facility6 Diaphragm safety valve MSV 2.5 bar/3.0 bar or7 Lift spring safety valve HFS ≥ 2.5 bar8 Flash trap (ET); not required in systems > 300 kWif a high limit safety cut-out ≤ 110 °C and a maximumpressure limiter are additionally provided for each boiler.9 Maximum pressure limiter10 Pressure gauge11 Low water indicator (WMS); not in systems ≤ 300 ≤ kW,where instead a minimum pressure limiter or areplacement measure approved by the manufactureris provided ≤ for each boiler12 Non-return valve13 Boiler drain & fill valve (KFE)14 Expansion line15 Shut-off valve - with lockout against unintentional closure,e.g. by sealed cap valve16 Drain upstream of diaphragm expansion vessel17 Diaphragm expansion vessel (DIN EN 13831)1) The maximum achievable flow temperature in combinationwith Logamatic control units is approx. 18 K below theshutdown temperature (high limit safety cut-out).Technical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01) 51