Systemair DVS 500D4 SA - Centrifugal roof fan, vertical discharge

• Speed-controllable • Integral thermal contacts • Low sound level • Maintenance-free and reliable The DVS/DVSI models have impellers with backward curved blades and external rotor motors. All motors are speed controllable over the voltage. For speed controlling of DVS/DHS/DVSI roof fans with a frequency converter a type with all pole sine filter is needed! The motors are suspended on effective vibration dampers. DVS/DVSI 450D4/D6, 500D4/D6, 560D6 and 630D6 3~220V with D-connection and 3~380V with Y-connection. The performance data is the same at 3~220V or 3~380V. To protect the motors from overheating this models have integral thermal contacts,with external leads for connection to a motor protection device. The casing is made from aluminum and the base frame is from galvanised steel. Suitable for coastal applications. The impellers are manufactured from aluminum. DVS/DVSI with outlet vertical DVSI has a 50 mm mineral wool insulation for low noise level.