S&P CE ATEX Mode D'emploi page 29

• Pay special attention to the clearance between rotating and stationary parts.
The clearance must be at least 0.5% of the contact diameter (diameter of the
rotating part at the section where it may touch the stationary part) but must be
no less than 2 mm on the radial or axial planes, and need not be greater than
13 mm. This also applies to non-contact shaft seals.
• Contact shaft seals are not subject to these precautions and must be manufac-
tured from suitable materials and designed with an assessment of the ignition
risk.
• The fan must be installed in such a way that it is protected against external
forces and vibrations and, if necessary, it must be installed on an anti-vibration
support.
• If exible connections are required to isolate the fan from the installation
ducts, they must be made of a material that complies with EN 14986 guidelines
to avoid possible static electricity shocks.
• Make sure that possible sources of ignition cannot spread through the suction
or discharge outlets or directly into hazardous areas.
• Check that all parts rotate freely without friction and without any obstacles.
• Check that foreign objects or residue cannot be sucked in and that no foreign
bodies or residues can be released inside the fan.
• Check that the model and characteristics of the fan (voltage, frequency, speed,
ATEX marking, etc.) are correct. (maximum variation of voltage and frequency:
5%).
• Check that the grounding has been carried out correctly in accordance with
EN 60204-1 guidelines and using the speci c terminals provided by the ma-
nufacturer.
• Check that the safe distances between the live parts are adequate in accordan-
ce with EN 60204-1.
• If the motor is supplied by a frequency converter, the following considerations
must be taken into account:
The speci c data on the motor's name plate must be consulted.
The motor must be equipped with a thermal protection device connected to
a control system that cuts off the power supply to the motor in the event of
overheating.
The set speed and/or frequency limit on the fan name plate must not be
exceeded.
• Check that the current absorbed during operation does not exceed the values
speci ed on the fan or motor name plate.
• After two hours of operation, check that the screws are still correctly fastened
and tightened to the correct torque and retighten them if necessary.
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