15
We reserve the right to make changes
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.
Roof fan STEF/STOF supplied without safety switch or
with loose-supplied SAFE
1. Mount the safety switch please note the position
of the hinges
2. Open the safety switch cover.
3. Wire the motor cable o the safety switch.
4. 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 STEF/for demounting the STOF for
servicing.
5. Wire the connections and close the safety switch.
Electrical wiring
Mounting of the flexible connection STEZ-02
and back drought shutter STEZ-05
STEZ-02- and STEZ-05 are designed for use with flat
roof socket STEZ-01, mounting frame STEZ-03 or inlet
sound attenuator STEZ-07. STEZ-01- and STEZ-03-
have a DIN-flange as standard. With STEZ-07-
connection plate STEZ-04- needs to be used. STEZ-02-
and STEZ-05- are mounted under the STEZ-07.
STEZ-07 must be covered with the roof material
(for example bitumen roof felt). It is recommended also
for STEZ-01 and BOGA.
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
6. Check to make sure that the safety switch functions
properly.
7. When commissioning the fan make sure that the
impellers is rotating to the right direction.
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.
Summary of Contents for ROOFMASTER STEF Series
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