Duct fans

Rosenberg in-line fans types RS and R are direct-driven. The RS series housing is made of recyclable, impact-resistant black plastic (PA6.6+GF) with a built-in terminal-box holder and the option of anchoring to support rods. The R series housing, up to size 315, is galvanised sheet. Electrical connections in the terminal box. Inlet and outlet with spigots for standard duct profiles. Can be installed in any position. Both series have backward-curved plastic blades, always fitted to the external rotor of a voltage-controllable motor. The unit is balanced on two planes to grade G 2.5 according to DIN/ISO 1940. Closed external-rotor motor IP44 with moisture-resistant impregnation and thermal contacts in the windings. Sealed bearing with long-life lubrication, maintenance-free.

Terminal box IP44/54.

DOCUMENTATION

Manufacturer's declaration of conformity and operating instructions according to Machinery Directive 89/392/EWG and Low Voltage Directive 73/23/EWG.

APPLICATIONS

Found in air-conditioning and/or air-extraction systems connected directly to rectangular ducts.

ADVANTAGES

Easy mounting on a standard 20 mm flange
Can be mounted in any position
100% continuous control with an autotransformer or electronics

Standard feature

built-in protection by thermal contacts

Compact, ergonomic design
Extremely low inrush current

DESIGN FEATURES

Duct fans combine the advantages of axial fans – straight-through air flow and simple installation – with those of centrifugal fans – high pressure stability, low noise and excellent efficiency. Housing in galvanised sheet steel with rectangular sections, ready for direct installation in ventilation ducts in any position; inlet and outlet with a standard 20 mm flange. Series EKA 200-4 to EKA 450 with forward-curved steel blades, EKAE 200-2 with backward-curved plastic blades. External-rotor motor with voltage control. Unit balanced on two planes to grade G 2.5 according to DIN/ISO 1940.

HOUSING

The housings are made of galvanised sheet steel in the shape of a rectangular duct, so they can be fitted in any position in duct systems. The fans are installed with 20 mm wide flanges on both inlet and outlet. The EKA 200-450 series has forward-curved blades in galvanised sheet steel. The KHA 200-450 series instead has high-efficiency backward-curved blades in seawater-resistant aluminium (on request). Models KHAEK and KHADK are for conveying dirty air, as they have an inspection opening giving easy access to the motor–fan unit.

FANS

The fans are mounted directly on the rotors of external-rotor motors. The motor–fan unit is balanced on 2 planes to grade G 2.5 according to DIN/ISO 1940.

ELECTRICAL CONNECTION

The motors have a side cable. The electrical connection is made through an IP44 terminal box supplied with the motor. Closed external-rotor motor IP44 with moisture-resistant impregnation and thermal contacts in the windings. Sealed ball bearing with long-life, maintenance-free lubrication. Terminal box IP44/54.

DOCUMENTATION

Manufacturer's declaration of conformity and operating instructions according to Machinery Directive 89/392/EWG, CE marking according to EMC Directive 89/336/EWG and Low Voltage Directive 73/23/EWG.

MATCHING ACCESSORIES AVAILABLE

Duct silencer
Duct filter holder
Speed controller
Counter-flange
Flexible connector
Shutters (also motorised, with servo drive)

Note

also available in an ATEX version