Roof fans

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 500-710, 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 pressure sensor has a display with an adjustable pressure measurement range of (100 Pa, 300 Pa, 500 Pa, 1000 Pa).

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Casing

The casing of the Rosenberg roof fans (DV/S, DVW/S) consists of seawater-resistant aluminium and a base frame with integrated inlet cone.

model - DV

Base frame with integrated inlet cone made of galvanised sheet steel

model - DVS

Casing with integrated sound insulation (S); base frame with integrated inlet cone made of galvanised sheet steel

model - DVW

up to size 500: Base frame with integrated inlet cone made of galvanised sheet steel

from size 560: Base frame with integrated inlet cone made of galvanised sheet steel

model - DVWS

Casing with integrated sound insulation (S)

up to size 500: Base frame with integrated inlet cone made of galvanised sheet steel

from size 560: Base frame with integrated inlet cone made of galvanised sheet steel and additional plastic coating

Impellers

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.

model - DV/S

up to size 400: High performance impellers with backward curved blades made of plastic

from size 450: High performance impellers with backward curved blades made of aluminium

model - DVW/S

efficiency-optimised high performance impellers (W) with backward curved blades made of aluminium

Electrical connection

The drive motors are fitted with a set-up terminal box in IP54, which is easily accessible for the electrical connection after removing the rain guard. Upon request, the device switch can be mounted (optional) on the casing of the fan.

up to size 310L

Motor in protective class IP44. Thermal switch is switched in series in the windings of the motor.

from size 355

Motor in protection class IP54. Thermal switch installed in the winding and routed to the outside on the terminal board.

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Casing

The casing of the Rosenberg roof fans (DH, DHW) consists of seawater-resistant aluminium and a base frame with integrated inlet cone.

model - DH

Hood made of seawater-resistant aluminium; base frame with integrated inlet cone made of galvanised steel sheet

model - DHW

up to size 500: Hood made of seawater-resistant aluminium; base frame with integrated inlet cone made of galvanised steel sheet

from size 560: Hood made of galvanised steel; base frame with integrated inlet cone made of galvanised steel sheet and additionally plastic coated

Impellers

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.

model - DH

up to size 400: High performance impellers with backward curved blades made of plastic

from size 450: High performance impellers with backward curved blades made of aluminium

model - DHW

efficiency-optimised high performance impellers (W) with backward curved blades made of aluminium

Electrical connection

The drive motors are fitted with a set-up terminal box in IP54, which is easily accessible for the electrical connection after removing the rain guard. Upon request, the device switch can be mounted (optional) on the casing of the fan.

up to size 310L

Motor in protection class IP44. Thermal switch is switched in series in the windings of the motor.

from size 355

Motor in protection class IP54. Thermal switch installed in the winding and routed to the outside on the terminal board.

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