Logano plus SB315, SB615, SB745 - Buderus

Installation99.5 Additional safety equipment to DIN EN 128289.5.1 Low water indicator to protect againstoverheatingIn accordance with DIN EN 12828, a low water indicatoris required to protect the boiler against overheating.Minimum pressure limiter and minimum pressureswitchDIN EN 12828 permits an approved minimum pressurelimiter as an alternative to the low water indicator. Inheating systems with outputs ≤ 300 kW, a reasonablypriced alternative to the low water indicator is theminimum pressure switch sold by Buderus ( tab. 41).The Logano plus SB315 and SB615 floor standingcondensing boilers up to boiler size 240 kW have aconnector at the back where a minimum pressure switchcan easily be installed.For the Logano plus SB745, a minimum pressure limiteris available as an accessory, which can be fitted to a valvedistributor. Both accessories are available from Buderus.Water level limiter (low water indicator)From boiler outputs > 300 kW, Buderus offers anaffordable water level limiter for the Logano plus SB615( tab. 41). For its positioning and installation, allLogano plus SB615 floor standing condensing boilersinto which it could be fitted have a special connector atthe top ( page 17). Compared to the usual installationin the heating system flow, this reduces the overallinstallation height of the boiler. A minimum pressure limiteris available for boiler size 310 kW. It can be attached tothe back of the boiler with an adaptor.Safety component Used with (boiler size) Make Component designationMinimum pressureswitch 1)Logano plus SB315 (50 – 115)Logano plus SB615 (145 – 240)Fantini Cosmi B 01 ATF 0.8Fantini Cosmi 2B 01 ATF 0.8Tested and approved as partof the boiler type-testqualification.Water levellimiterLogano plus SB615 (> 310) Sasserath Syr 932.1 TÜV-HWB-96-190Minimum pressurelimiterTable 41 Approval designations of additional safety equipment to DIN EN 12828 for the Logano plus SB315, SB615and SB745 floor standing condensing boilers1) With fully wired connecting cable for Buderus control units, only permissible for ≤ 300 kW. For boiler sizes > 300 kW, DIN EN 12828specifies that a low water indicator or suitable alternative, e.g. minimum pressure limiter, is required.9.5.2 Safety equipment versionsLogano plus SB615 – 310Logano plus SB745 (all)Sauter DSL 143 F001TÜV SDBF-00-330Safety equipment versiont R ≤ 105 °C, high limit safety cut-out with shutdowntemperature ≤ 110 °C to DIN EN 12828Heat source≤ 300 kW>300kWSafety equipment assembly, standardequipment level+ +Maximum pressure limiter – +Set with STB and maximum pressure limiter – + 1)Minimum pressure limiter – 2) – 2)Table 42 Safety equipment versions for Logano plus SB315, SB615 and SB745 floor standing condensing boilers1) Instead of the flash trap to DIN EN 12828 in systems with t R ≤ 105 °C (high limit safety cut-out 110 °C).2) Instead of the low water indicator, or as a recommended measure with Logano plus SB745 and Logano plus SB615-310 to DIN EN 12828 insystems with t R ≤ 105 °C (high limit safety cut-out ≤ 110 °C).+ Required– Not requiredTechnical guide Floor standing gas/oil condensing boilers Logano plus SB315, SB615, SB745 – 6 720 802 589 (2012/01) 81