Rooftop fan DRD H series

horizontalIP55centrifugal

• Centrifugal roof fan for direct or ducted air extraction of commercial and industrial buildings. • Horizontal air outlet. • Low noise level. • Housing made of galvanised sheet steel. • Plastic weather protection hood. • Motor outside of the air flow. • Suitable for temperature ranges from -20 °C to +80 °C • Sturdy eyebolts enable transport by crane. • Centrifugal impellers with backward curved blades made of galvanised sheet steel. • Three-phase AC motor. • Degree of protection IP55. • S1 operating mode (continuous operation). • Speed controllable with frequency converter. • Permissible frequency range for speed control with frequency converter 20-50 Hz. • The temperature in the fan motor is monitored by PTC thermistors. The PTC thermistors must be connected to a release system, that permanently disconnects the fan from the power supply if the temperature is too high. Electrical connection •Connection in the terminal box on the motor. Safety instructions •The fan may only be operated only if the protection against accidental contact with the impeller is guaranteed in accordance with DIN EN ISO 13857.