Roofmaster STEC non-insulated version - Installation and maintenance
3
FläktGroup DC_10082GB_20180213_R1
Specifications are subject to alteration without notice
3 TECHNICAL DESCRIPTION
The roof fan is used to generate required air flow at current pres-
sure drop equal to losses in the duct system. This is done using
a rotating impeller inside the fan casing.
3.1 CONSTRUCTION
1. Casing
2. Roof panel (1 or 3 pcs)
3. Bottom plate
4. Inlet cone
5. Impeller
6. Rain cover
7. Motor bracket
8. Motor
9. Junction box
10. Cable grommets
11. Handles (sizes 400 - 630)
12. Mounting frame with hinges (sizes 225 - 630)
3.2 APPLICATIONS
Roof fans are used as 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 ducting. This prevents
the humidity freezing within the fan structure.
3.3 MOTORS
Motors are either 1- or 3-phase external rotor EC motors with in-
tegrated impeller and speed controller.
Fan size
Motor type Motor construction
Input voltage
190 - 400
EC
External rotor
1~230 VAC
450 - 630
EC
External rotor
3~400 VAC
Detailed motor information as well as min. and max. allowed tem-
peratures are available in the technical catalogue.
2
1
3
5
7
6
8
1
4
10
10
11
2
SIZES 190 - 310
SIZES 355 - 630
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