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8. Commissioning
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Electricity warning (hazardous voltage)
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Failure to observe the hazard may result in death, injury or damage to property.
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Before performing any work on conductive parts, always disconnect all of the unit from the
electricity supply with all poles and make sure that it cannot be switched back on again.
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Caution! Burning hazard.
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Failure to observe the hazard may result in personal injury and/or damage to property.
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Do not touch the surface until the motor and heater have cooled.
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Never reach into the impeller or other rotating or moving parts.
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Failure to observe the hazard may lead to serious injury.
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Work may only be performed once the impeller has come to a complete halt.
Commissioning by trained technical personnel may only be performed when any risk has been ruled out.
The following checks should be performed in accordance with the installation and operating manual and
the regulations in force:
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Correctly sealed installation of the unit and duct system.
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Check the duct system, unit and medium lines, if present, remove any foreign bodies if necessary.
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The intake opening and inflow into the unit must be clear.
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Check all mechanical and electrical protection measures (e.g. earthing).
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Voltage, frequency and type of current must correspond with the rating plate.
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Check all electrical connections and wiring.
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Check any electrical, switching, safety and control devices connected.
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The unit may not be switched on when the housing is open.
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Measure electricity consumption at operating speed and compare with the rated current.
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Check the fan for excessive vibrations and noise generation.
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The impeller must not be rubbing against the inlet nozzle or other fittings.
The compliance with the characteristics requires a proper inflow and outflow of the device. The Power
consumption and function of the unit is examine regularly by qualified person.
Switching the unit on/off.
After a proper connection to the mains the unit is fully functional. However, it is recommended that an
isolator switch be installed on the unit.
Changing fan stage
The fan is voltage controllable. Thus, through installation of a transformer or frequency convertor the
speed of the fans can be regulated.
Thermal contact
The motor has a thermal contact that opens when the permissible motor temperature is exceeded. The
unit switches off when the contact opens.
After the motor has cooled down, i.e. thermal contact is closed and troubleshooting (see 14.1. Error
table) the unit can be returned to service.
9. Operation
