Centrifugal roof fans - RDM 3E-2531-4W-07

Centrifugal roof fan RDM 3E with integrated drive (VFD)

with swirl free vertically directed discharge for gas medium up to +60 °C. Stylish sealed casing manufactured from aluminium, Base frame of galvanised sheet steel for fitting to upstand, projecting well beyond the upstand in order to increase weatherproofing. Discharge outlets are protected from the weather on fan shutdown by automatic backdraught shutters. Casing parts, and the impeller plus motor, are easily removed for inspection and maintenance. High performance centrifugal impeller with backward curved blades directly fitted to a standard IEC-motor shaft, execution B5, protection IP 55, with terminal box fitted and ready for connection. The motor is equipped with PTC Thermistors as a standard. Drive (VFD) preprogrammed, immediately ready for operation with signal 0 to 10 V. Flange connection at intake acc. to DIN 24155-2 Protection grid at discharge balanced statically and dynamically according to DIN ISO 21940-11. Service switch fitted available as an accessory Performance data in according DIN 24166  tolerance class 2 (BS 848 Class "B"). Meets the efficiency requirements of Regulation EU1253/2014 for ventilation units.