Properties
- flow rates up to 11,500 m³/h
- size: 310 - 630 mm (impeller diameter)
- vertical outlet
- highly efficient EC technology
- backward curved impellers
- mounted on/off switch
- solid weatherproof casing
- easy to install
- integrated control system (EC controller)
- speed is 100% infinitely variable
- integrated pressure sensor (type: pressure control)
Casing
Base frames with threaded bolts for tightening of suction side accessories and retracted inlet cone made of galvanised sheet metal steel. Rain protective hood and square casing made of seawater-proof aluminium. Motor cage with integrated contact-protection made of plastic coated round bar steel. Housing with integrated sound insulation (S) for design DV/S...G.
Impellers
Efficiency-optimised high-performance impellers with backward curved blades. The impellers are mounted directly on the rotors of the external rotor motors and are dynamically balanced on two levels with the rotor according to quality level G2.5 as per DIN ISO 1940.
The Rosenberg EC roof fans size 310-450 have a weather-proof plastic impeller made of PA6 (polyamide); the frame size 500-630, an impeller made of seawater-resistant aluminium.
Electrical connection
The electrical connection is at the pre-assembled device’s switch depending upon the design single-phase or three-phase. Integrated motor protection is indicated via an alarm relay.
Type "open loop" In the “open loop” (standard) model, the speed is continuously provided
by a 0-10V signal or a potentiometer (accessories).
Type "closed loop" In the “closed loop” model, the pressure setpoint is continuously provided
via a pre-wired potentiometer or a 0-10V signal. The pre-assembled
pressuresensor has a display with an adjustable pressure
measurement range of (100 Pa, 300 Pa, 500 Pa, 1000 Pa).