EN
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B AVD.. and B VAR.. – Smoke Extraction Fans F300/F400/F600
Installation and Operating Instructions
3.9 Maximum permissible vibration limits according to ISO 14694 / ISO 10816-3
– Vibration monitor
When using vibration monitors, these must not deactivate the smoke extraction fan in a smoke extraction
situation!
– Installation of a vibration monitor
The vibration monitor (on-site) must be installed on the casing of the fan and it must not lie in the turning range zone
of the impeller.
The air gap (see Fig.16) must not be affected by the installation of the vibration monitor!
– Selection of vibration dampers
In order to optimally dampen the vibrations created by the rotating components in the fan, the correct selection of
the vibration damper is crucial. The design is based on the determined total mass of the fan incl. mounting parts to
be dampened. In this respect, the individual net weights of the components must be added together.
Example:
B VAR 900/4 37 kW F300 as Z unit
1) Determination of the mass to be dampened
B VAR 900/4
533 kg
B VAR 900/4
533 kg
MP-Z 900
68 kg
VR 900
34 kg
MK 900
18 kg
Total weight
1186 kg
3.10 Centre of gravity position
A motor protrusion arises depending on the size and motor power and thus an unbalanced centre of gravity outside of
the casing. An extension duct (Type VR..) must be used (Fig.17). to determine the centre of gravity. The weight infor-
mation for the respective types can be found on the type plate!
3.11 Recommended tightening torque for mounting screws
The following tightening torques for connection of mounting nuts and screws (grade 8.8) are to be used:
The impeller mounting on the motor shaft is secured against loosening at the factory with liquid screw secu-
rer.
max. permissible vibration limits for fan power < 75 kW
Commissioning
Alarm
Deactivation
Permanent inst.
Flexible install.
Permanent inst.
Flexible install.
Permanent inst.
Flexible install.
[mm/s]
[mm/s]
[mm/s]
[mm/s]
[mm/s]
[mm/s]
4.5
6.3
7.1
11.8
9.0
12.5
Fig.17
CORRECT!
(centre of gravity)
INCORRECT!
(centre of gravity)
Screw size
Tightening torque
Tightening torque VERBUS RIPP
M8
20 Nm
25 Nm
M10
35 Nm
49 Nm
M12
60 Nm
86 Nm
M16
150 Nm
210 Nm
ATTENTION
ATTENTION
ATTENTION
