5 Description
Systemair roof fans are available to you in numerous versions, which means that you can make an optimum selection for your indi-
vidual case of use. Extremely robust and long-living, they ensure reliable waste air solutions in various buildings. You can put your
tailor-made ventilation system together with our large range of accessories.
5.1 DVS/DVSI/DHS series
• Voltage-controllable
• Low sound level
• Operationally safe and maintenance-free
• DVS, DHS and DVSI fans have been equipped with backward-bent radial blades and external rotor motors.
For operation of the DVS/DHS/DVSI fans on a frequency inverter, an all-pole sine fi lter is to be used! The motors have been suspended
free of vibrations.
DVS/DHS/DVSI ...EZ / EV / ES: 1~ motor 2-phase operation possible.
DVS/DHS/DVSI ...E4: Designed for 1-phase operation.
DVS/DHS/DVSI ...DV / DS: 3~ 2-phase operation possible via Y/D circuit.
The motors of the DVS/DHS/DVSI fans up to size 311 possess integrated thermo-contacts with automatic and also manual reset pursu-
ant to EN 60335-2-80 as overheating protection. Fans from size 355 have integrated thermo-contacts with fi nished lines for connec-
tion to a motor protection device. The housing comprises salt water-proof aluminium, the base frame powder-coated, galvanised sheet
steel. On the base frame with deep-drawn admission nozzle, a bird protection grid of powder-coated, galvanised sheet steel has been
fi tted. The rotors are made of polyamide PA6 25 GV up to size 355, from size 400 of aluminium.
DVS models possess a vertical blow-out.
DVSI models have been sound-protected with mineral wool 50 mm in thickness.
Fig. 22: Example DVS Fig. 23: Example DVSI
Fig. 24: Example DHS 190 - 500
Fig. 25: Example DHS 560 - 710
33
Roof fans - V 1.0
Description
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