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Commissioning and Maintenance
Commissioning of direct driven fan unit
ELECTRICAL HAZARD AND DANGER FROM ROTATING UNIT PARTS!
In doing so, be sure to observe the safety information on page 24.
• Remove any installation residues and foreign substances that may be present in the
impeller and intake area.
• Check whether the motor protection has been set up correctly (also see enclosed
project documentation and/or „Motor protection“ on page 18).
• With Y/Δ starting, set up the motor protection device for 58% of the rated current if the
phase current flows through it – i.e. motor protection device must be installed between
motor terminals U1, V1, W1, and not upstream of the switchgear in the supply feeder.
Maintenance of direct driven fan unit
ELECTRICAL HAZARD AND DANGER FROM ROTATING UNIT PARTS!
In doing so, be sure to observe the safety information on page 24.
The following maintenance steps must be carried out:
• Check electric motors for soiling, damage and corrosion, also check mountings.
• Check electric motors for bearing noise, have bearings replaced by specialist personnel
if required.
• Check impeller (particularly welded seams) for cracks; have bearing replaced by
specialist personnel if necessary.
Filter units
Commissioning of filter unit
ELECTRICAL HAZARD AND DANGER FROM ROTATING UNIT PARTS!
OBSERVE PERSONAL PROTECTION MEASURES.
In doing so, be sure to observe the safety information on page 24.
The following commissioning steps must be carried out:
• Check filter unit and installed filter for damage.
• Check that the filter unit is correctly seated in the mounting frame.
• Clean the filter unit and system parts in the airflow direction upstream of the filter to
remove installation dust, if required.
• The air handling unit and air ducts must be cleaned again before installing class F9 filters
and higher.
• Bring the fan into operation then mark and record the initial pressure differential on the
display unit (if installed).
