Commissioning - Nicotra Gebhardt RLM 53 Betriebsanleitung

BA-CFD-RLM 9.9 – 05/2021
In all cases the power limitations provided by the existing power supply company
must be taken into account.
In the event that plant conditions necessitate a direct start the suitability of the fan design
is to be confirmed with Nicotra Gebhardt. Fans with high inertia impellers can take over 6
seconds to reach top running speed. In these cases heavy duty motor protection relays
or bimetal relays must be provided.
The motors are designed for S1 continual operation. With more than three starts per
hour the suitability of the motor is to be confirmed by Nicotra Gebhardt.
CAUTION PM motors without integrated electronics must be operated at inverters suitable
for that purpose! (e.g. Danfoss VLT HVAC Drive FC-100, see Chapter 6.6).

6. Commissioning

6.1 Before commissioning the following checks must be carried out:
 It is to be checked whether all mechanical and electrical safety devices have been
fitted and connected.
 Protection devices have to be fitted in accordance with DIN EN ISO 13857!
 The ducts and the fan must be checked for foreign bodies (tools, small components,
building debris, etc.)
 The idle running of the impeller must be checked by hand.
 The power setting, voltage and frequency for the mains connections must be checked
against the fan or motor type plate.
 Connected control devices must be checked for functioning.
 Check the parameter settings at the frequency inverters for the PM motors (see 6.6).
 Inspection openings (if they exist) must be closed.
The fan may only be commisioned if all the safety devices have been fitted and if it
is ensured that the impeller has been safeguarded according to DIN EN ISO 13857!
The suitability of protection devices and their fixtures to the fan have to be
evaluated within the complete security concept of the installation.
When operating with a frequency inverter the system of fan-motor-inverter can
generate increased vibrations within certain frequencies or fan rpm-areas.
Operation in such an area must absolutely be avoided!
When putting the fan into operation this type of eventually occuring resonance
rpm have to be determined and to be blinded out. Matching frequency inverters
have to be set and operated according to the instructions given by their
manufacturer. Non observance of these instructions may cause a destruction of
the fan!
EN-8/18
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