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
