15
We
reserve
the
right
to
make
change
s
ROOFMASTER STEF and STOF
Electrical wiring
(To be carried out by an authorised electrician).
The wiring diagrams are on the following page.
Roof fan STEF supplied with factory-wired safety
switch SAFE.
1. Mount the safety switch please note the position
of the hinges.
2. Open the safety switch cover.
3. Run the power supply cable through the cable gland
of the safety switch. Adjust the length of the cable
so that sufficient slack will be available for opening the
fan for servicing.
4. Wire the connections and close the safety switch.
5. Check to make sure that the safety switch functions
properly.
6. When commissioning the fan make sure that the
impeller is rotating to the right direction.
Electrical wiring
Weights
Size
Weight, kg
STEF
31
31
45
50
66
116
199
STOF
5,6
5,8
1
2
3
4
5
6
7
002
005
Frequency converter drive
STEF roof fans with single speed three-phase
motors can be driven with frequency converters. The min.
frequency is is 20 Hz. Max. frequency is 50Hz,
for possibly higher max. frequencies please refer to the
STEF-catalogue.
