Roof fan RD

roof fan
roof fan
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Description

■ Specification Centrifugal roof fan with horizontal discharge. Flat design with large overlaying rain cowl. ■ Casing Base plate (with inlet cone) and other parts made of galvanised steel. Rain cowl and protection grille made of aluminium. Base plate with threaded bolt for connection of intake air accesso- ries. ■ Impeller High performance backward curved centrifugal impeller made of galvanised steel, dynamically balanced with the motor unit. ■ Motor Totally enclosed external rotor motor with ball bearings, protected to IP 44. insulated for protection against moisture. Maintenance free and radio suppressed. ■ Motor protection Through built-in thermal contacts which must be connected to the motor full protection unit. Explosion proof models are equip- ped with thermal motor protection through built-in PTC thermistor which is connected to the tripping unit MSA. Hereby speed control is allowed where the minimum voltage must not be less than 115V.

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