Installation and Maintenance Roof Fan STOF
5
Fläkt Woods 9734 GB 2015.06.30 Specifications are subject to alteration without notice
3. TECHNICAL SPECIFICATION, CONT.
3.2 APPLICATIONS
Roof fans are used as an exhaust fans in ventilation systems.
The maximum allowed rotational speed for fan-motor combination
is shown in the technical catalogue.
Note!
If the fan is not used continuously in a cold climate, it is recom
-
mended to use back draught shutter in the duct. This prevents
the humidity from freezing within the fan structure.
3.3 MOTORS
Motors are either 1- or 3-phase external rotor motors with
integrated impeller. EC-motors have also an integrated speed
controller.
Fan size Motor type Motor construction Input voltage
190 - 400 AC Outer rotor 1~230 VAC
355 - 630 AC Outer rotor 3~400 VAC
190 - 400 EC Outer rotor 1~230 VAC
450 - 630 EC Outer rotor 3~400 VAC
Detailed motor information as well as min and max allowed tem
-
peratures are available in the technical catalogue.
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