DVWS... - Roof fans vertical outlet and with 50mm sound absorbing casing
· easy to install
· weatherproof housing
· Motor protection by thermal contacts
Features and Constructions:
The Rosenberg roof fans are used for ventilation of department stores, supermarkets, factories, swimming pools, kitchens, dining halls, warehouses, garages, farms and stables. The fans are suitable for mounting on a flat or any shaped roof.
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
Classification of the fan series:
NRVU = Non Residential Ventilation Units
UVU = Unidirectional Ventilation Units
Reference to Directives:
Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE dentification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.
Casing made of seawater-resistant aluminium with integrated 50mm sound absorbing cover.
up to size 500 : Base frame with bolts for tightening of inlet accessories and rectangular inlet cone made of galvanized steel.
from size 560: Base frame with bolts for tightening of inlet accessories and rectangular inlet cone made of galvanized steel, additionally plastic coated.
Standard Coating RAL 7030 / RAL 7035 or other coating possible on request against extra charge.
Bird Protection Grill:
A coated grill RAL 9005 (black), ensures an optimal protection. Inlet grill possible on request.
Efficiency optimized backward curved impellers made of aluminium. Impellers are mounted directly to the rotor of the external roto r motor and are balanced dynamically at two levels together with the rotor according to quality level G 6.3 to DIN 1940.
Used are external rotor motors with IP 44/54 according to DIN EN 60034-5 with moisture protection, ball bearing mounted and with thermal contacts as motor protection.
Motor protection class IP 54.
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-dimensioned ball-bearings, fitted on both sides with long life time grease are used. Both ball-bearing seats are ground to superfinish 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.
For 60Hz Types (possible on request)
The motors are equipped with a built-on terminal box in protection class IP 54 with easy access for electrical connection after removal of the rain cover. Upon request the isolator switch (against extra charge) can be mounted on the casing of the fan.
Air volume control:
For more information see accessories!
Please note the directives 1253/2014/EU (Lot 6) applying from 01.01.2016 for the ventilation units (ventilation fans).
Keyword: „Multi-stage drive" (at least 3 fixed speeds, as well as speed 0 („off"). Suitable control and regulation devices are available as accessories.
5-speed control unit:
230V à RTE
400V à RTD
Infinitely variable control unit:
230V à ED / REE
400V à RED
400V à via Frequency converter (available on request)
WARNING : corner frequency must correspond to the nominal frequency
2-speed control unit:
(see reference „ multi-stage-drive)
400V à MSD 2
Scope of delivery:
· Roof fan (DVWS)
Air performance curves:
The performance curves for these fan types have been measured on a inlet side chamber testing platform according to DIN ISO EN 5801 in mounting position A (free inlet; free outlet) and are valid for air with a density of 1.2 kg/m³ and indicate the pressure increase Dpfa as a function of the air flow.
The bordered values printed in the performance curve diagrams show the A weighted LWA8 sound power level (fan outlet).
Determination of A-weighted LWA5 sound power level at fan inlet according to DIN 45 635, Part 38 is calculated as follows:
LWA5 [dB(A)] = LWA6 [dB(A)] -3dB
The "A" weighted sound pressure level LPA at a distance of 1 meter is calculated approximately by deducting 7 db(A) from the "A" weighted sound power level. It is important 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.
Rosenberg fans have a specific (pressure-) ratio < 1,05 (pressure < 5000 Pa).
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.
For further information, please click the model below for detail.
Picture of roof fans DVWS