5.2 DVN/DVNI series
The housing and the backward-bent radial blade comprise salt water-proof aluminium. The base frame with deep-drawn admission
nozzle has been made of galvanised sheet steel. Bird protection grid of powder-coated, galvanised sheet steel. The motors have been
suspended free of vibrations. 1-phase motors are speed-adjustable via a transformer in 1 phase, and 3-phase motors additionally
2-phase via a D/Y circuit excluded three-phase motors according to IE classifi cation, they are controllable only via frequency con-
verter!. As protection against overheating, the fans have thermo-contacts with fi nished lines for connection to a motor protection
device. The DVNI models are sound protected by mineral wool 50 mm in thickness.
DVN
Roof fans 120°C vertical blow-out: 3000-31500 m³/h, with backward-bent rotor blades, 1~ and 3~ versions
DVNI
Insulated roof fans 120°C vertical blow-out: 3000-31500 m³/h, with backward-bent rotor blades, 1~ and 3~ versions
Motors
The roof fans have been equipped with an effective motor protection via thermo-contacts. The DVS/DHS/DVN series from size 355
have fi nished thermo-contacts for connection to a motor protection device.
• Motor outside the airfl ow
• Conveying agent temperature up to
120°C
• Low sound level
• Operationally safe and maintenance-
free
• Extensive programme of accessories
• Vertical air throughfl ow
Fig. 36: Example DVN/DVNI up to 710 Fig. 37: Example DVN/DVNI 800 - 900
1
7
8
9
10
2
3
4
2
5
6
Fig. 38: Example of an installation arrangement with accessories
Legend
1 DVN/DVNI Fan 6 ASF Intake fl ange
2 VKS Automatic shutter 7 FTG Hinged frame
3 SSD Base sound absorber 8 TDA Adaptor frame
4 ASK Intake chamber 9 VKM Shutter
5 ASS Flexible connection 10 FDS Flat roof base
38
Description
Roof fans - V 1.0
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