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3.2 Power supply (see motor type label)
Optionally, the electric motors can be controlled continuously by means of a frequency inverter.
The maximal rotation speed at the impeller (see fan type label) must not be exceeded.
The ICA (instrumentation technology, control technology, automation technology) on site must
give protection against overspeed according DIN EN 60204-1.
In case of operation of several motors with a frequency inverter all-pole sinusoidal lters should
be used between frequency inverter and motor.
If frequency inverters are used in the explosion-hazarded area (Zone 1) these must be installed
outside the explosion-hazarded area and ameproof motors to DIN EN 60079-1 must be used.
Before connecting the fan, check the specications on the type label
and dimension the electrical control system accordingly.
With a motor power ≥ 4 kW for starting up the fan is a star-delta-con-
nection, a soft starter or a FI regulation to use to protect the impeller
and the motor bearing against premature damages.
In the case of direct involvement or frequent restart, damage or in-
creased wear may arise by the torque forces on the impeller.
4.1 Signs and explanations
Danger warnings
are marked with a warning triangle.
Notes
are marked with a hand symbol.
Warnings
are marked with a „STOP“ sign.
The information given in the operating manual is binding
is marked with a „book“.
4. Safety
Operating manual
Centrifugal fans
HF R | RV | MRV
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