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We reserve the right to make changes.
Roofmaster STEF and STOF
The STEF and STOF power roof ventilators are
used as exhaust air fans in ventilation installations.
The ventilator can be mounted either on a BOGA roof
duct STEZ-01 flat roof socket or STEZ-07 sound
attenuator or on a chimney built at site, fitted with
the MORA or STEZ-03 mounting frame. The fan
section is supported by hinges on one edge of the
base plate and can be raised and locked in fully
open position for cleaning.
Fig. 1
To mount the STEF/STOF on the BOGA roof duct
(or STEZ-01/STEZ-07)
1. Fit the sealing strip supplied, to the top edge of
the roof duct as shown in Figure 1.
2. Lift the STEF or STOF power roof ventilator onto
the roof duct. Use the lifting lugs supplied, if
necessary. See Figure 1.
Make sure that:
– the ventilator base plate is seated over the edges
of the chimney duct. Do not damage the sealing strip.
– the safety isolating switch on the ventilator and
that the cable gland on the roof duct are on the same
side. This determines the position of the hinges.
See Figure 1.
3. Secure the power roof ventilator via its base plate
to the roof duct flanges (tapped holes) using the four
M8 x 35 screws supplied in the bag of accessories.
To mount the STEF on an in-situ built chimney
with the MORA (STEZ-03) mounting frame.
(If the chimney has exactly the same dimensions
as those of the BOGA roof duct, no mounting frame will
be required, i.e. the ventilator can be mounted as
described in the preceding instruction.)
1. Fit the sealing strip, supplied, to the chimney
as shown in Figure 2.
2. Carefully mount the MORA mounting frame on
the chimney securing it with the four screws supplied
or wedge anchors. The mounting frame has four
12 mm dia. holes for the mounting screws. (The joint
must bear the wind load when the power roof
ventilator is opened for chimney sweeping.)
Make sure that the location of the safety isolating
switch and the direction of the hinges are
appropriate.
3. Fit the sealing strip, supplied, to the upper edge of
the mounting frame as shown in Figure 2.
4. Lift the power roof ventilator onto the mounting
frame and secure it as described in item 3 under the
heading “To mount the STEF on the BOGA roof
duct”. See Figure 2.
Fig. 2
Weights
Mounting
Safety isolating switch
Lifting lugs
Sealing strip
Hinges
Hinges
Mounting screw
Size
Weight, kg
STEF
32
32
45
52
73
115
205
1
2
3
4
5
6
7
STOF
28
28
39
44
63
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