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Commissioning
Commissioning of the frequency converter
♦ Install the fan and frequency converter as near as possible to one another.
♦ Use shielded cables.
♦ All components (fan, frequency converter and motor) must be grounded.
♦ We recommend using all-pole sinus filters.
Operation of the frequency converter
♦ Avoid running the fan via the frequency converter below 10 Hz.
♦ If controlling the fans via a frequency converter, provide thermal protection in the form of a PTC resistor or thermal
contacts (TC) in the motor.
♦ Starting time: min. 60 sec.
8.6 Protective grounding wire
• The terminal box is provided with a labeled grounding connection.
• The protective grounding must have a cross-section equal to or greater than that of the phase conductor.
8.7 Residual current circuit breaker
♦ Observe and respect local conditions, regulations and laws.
♦ If controlling the fans via a frequency converter, provide thermal protection in the form of a PTC resistor or thermal
contacts (TC) in the motor.
9 Commissioning
9.1 Safety information
♦ Commissioning may only be carried out by adequately qualified persons, details see Table 1 Qualifications, page 2.
♦ Wear protective equipment during all work in the vicinity of the fan, details see 2.2 Personal protective equipment,
page 2
9.2 Preconditions
♦ Installation and electrical connection have been correctly performed.
♦ Residual material from installation and foreign objects have been removed from the fan and ducts.
♦ Inlet and outlet are free.
♦ Safety devices have been fitted.
♦ Ground cable is connected.
♦ Cable glands are tight.
♦ Nominal current (from the name plate) is not exceeded.
♦ Data on the name plate corresponds with the connection data.
9.3 Tests before activation
♦ Check that safety elements and protective grilles are securely fastened.
9.4 Tests when activated
1. Before switching the fan on, check for externally visible damage and ensure that the protective equipment functions
properly.
2. Switch the fan on.
3. Checks:
♦ Direction of rotation/conveyance. The direction of rotation always applies looking at the rotor
♦ Smooth running (any vibrations and noise)
♦ Current consumption
♦ Tightness of all connections
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