ER... / DR... - Axial fans with double flange casing
· low installation depth
· usable for many applications
· can be installed in any position
· motor protection by thermal contacts
· speed is variable using auto transformers
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Description:
High efficiency axial fans are used large for air volumes pressure. The fans with square inlet cone are used for ventilating restaurants, gymnasiums, conference rooms, workshops, ware-houses, swimming pools and greenhouses.
Application areas:
Garage / Offices / Bars / Greenhouses / Skyscrapers / Hotels / Industrial buildings / Basement rooms / Playschool / Cinemas / Parking facilities / Warehouses / Nursing homes / Schools / Sports halls / Supermarkets / Workshops / Residential houses / Fitness centers / Inflatables
Reference to Directives:
Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE identification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.
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Casing:
Casing with double flange ring for duct installation
The casings of high efficiency axial fans are made of galvanized sheet steel and are plastic coated.
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Impellers:
The high efficiency axial fans have aerodynamically profiled blades. The blades are made of galvanized sheet metal, and are mounted directly to the rotor of the external rotor motor and are balanced dynamically together with the rotor according to quality level G2.5 to DIN1940.
Sizes 200 to 300 = made of galvanized and lacquered sheet steel
Sizes 315 to 630-6 = made of plastic
Sizes 630-4 to 1000 = made of aluminium
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Motor and motor protection:
All Rosenberg fans are equipped with direct driven external rotor motors. All our fans have motor protection through thermal contacts in the motor windings as standard. The motors apply to protection class IP44/IP54.
Sizes 200 to 300 = motor protection class IP44
All other sizes = motor protection class IP54
The drive has due to an external rotor motor a space saving, compact and attractive design. The motor is fitted within the impeller, which enables the best possible cooling. For this reason a 100% variable speed control can be guaranteed. V-belts, additional tension bars and motor mounting devices are not necessary. Only well-dimensions ball-bearings, fitted on both sides and life time greased are used.
Both ball-bearing seats are ground to high precision in one work process to eliminate any vibrations.
External rotor motors have extremely low starting currents. The windings comply to isolation class F.
In addition the windings have a standard moisture impregnation.
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Electrical connection:
The motors are fitted with an outgoing cable. The electrical connection can be made via an IP44 terminal box, which is supplied loose.
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Installation:
Axial fans with double flanges can be easily integrated into a pipe system. Accessories like flanges or flexible duct connectors are optional.
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Air volume control:
For more information see accessories!
5-speed control unit:
230V à RE / RTE …
400V à RTD …
Infinitely variable control unit:
230V à ED / REE …
400V à RED …
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Scope of delivery:
· Axial fan (ER / DR)
· Terminal box (loose)
· Documentation
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Important notes:
Air performance curves:
The performance curves for these fan types have been measured in mounting position A (free inlet; free outlet) and show the pressure increase ∆pfa as a function of the air flow; version with inlet cone and without protection guards.
Noise levels:
The bordered values printed in the performance curve diagrams show the "A" weighted LWA5 sound power level (fan inlet). Determination of "A" weighted LWA6 sound power level at fan outlet:
LWA6 [dB(A)] = LWA5 [dB(A)]
The "A" weighted sound pressure level LPA at a distance of 1 metre is calculated approximately by deducting 7 db(A) from the "A" weighted sound power level. It is importmant to note that the reflection and room characteristic as well as natural frequencies influence the sound pressure levels a different way. The octave sound power level LWA at octave medium frequency you can find on the table on each fan type page.
Technical data presentation:
The performance data shown represent the accuracy class 3 according to DIN 24166.
Classification of the fan series:
NRVU = Non Residential Ventilation Units
UVU = Unidirectional Ventilation Units
Erp-Information:
Rosenberg fans have a spezfic (pressure-) ratio < 1,05 (pressure < 5000 Pa).
Service life:
For maximum service life of Rosenberg products please beware of the maintenance hints on the manual for each product type.
Recycling and disposal:
For recycling and disposal of Rosenberg products comply with applicable locally requirements and regulations.
Axial fans with double flange casing
Casing made from galvanized and plastic-coated steel, ER/DR series short cased with two flanges.
Impellers with aerodynamically shaped blades, up to size 300 made from galvanized steel, from size 315 up to size 630-6 made from plastic, from size 630-4 from die-cast aluminium, mounted onto a speed controllable external rotor motor. The fan is balanced on two levels according to quality level G 2.5 DIN/ISO 1940.
Closed motor, protection class IP 44/54 with protection against humidity and thermal contacts wired in windings for motor protection from size 315.
Maintenance free ball bearings closed on both sides, sealed for life. Electrical connection through terminal box (not connected) in IP 44.
Reference to Directives:
Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE identification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.
For further information, please click the model below for detail.
Picture of Axial fans DR
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