Systemair DVS 450D4-A1**

• 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

3~230V with D-connection and 3~400V with Y-connection.

The performance data is the same at 3~230V or 3~400V.

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.