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11 - SPECIAL INFORMATION FOR ATEX AREAS
In accordance with directive 2014/34/EU (explosive atmospheres)
11.1 - General information
■ Evaluation of the level of danger of explosion established in accordance with standards NF EN ISO 80079-36, NF EN ISO
80079-37 and EN 1127-1.
■ The units are certified as complying with the recommendations in standard EN 13463-5 "Protection by constructional safety c"
(see § 3 - REGULATIONS).
■ The user must classify the various potentially explosive areas in accordance with directive 1999/92/EC.
■ The units are selected and manufactured according to the type of area defined by the user.
A unit must never operate under conditions other than those it was designed for.
11.2 - Marking
■ Each unit is supplied with an ATEX Conformity Certificate; the ATEX marking is inscribed on the name plate as shown below:
2G/3G Ex h IIB / IIC (or IIB + H2) T...°C or TX Gb/Gc
- Example:
*
The labelling and the equipment integrated into the unit are adapted according to the conditions defined by the customer in the sheet completed prior to ordering.
-
: Standardised ATEX logo.
- II: Group II = surface industries.
- Equipment category (2 or 3 depending on zone 1 or 2).
- Ex h: Regulatory markings according to standard NF EN ISO 80079-36:2016
- Gas group subdivision IIA, IIB or IIC
- The IIB labelling is suitable for gas group subdivisions IIA and IIB.
- For group IIC, in the presence of hydrogen, depending on the labelling of the integrated components, the device labelling may
be IIB + H2
- TX (indicates the maximum permitted surface temperature) may either:
• Be replaced in the labelling by the temperature class given in the operating conditions defined by the customer - T1 (450 °C) to
T6 (85 °C).
• State the actual temperature (Preceded by the letter T and followed by the unit °C).
- EPL: ("Explosion Protection Level") G for gas, followed by the level b or c depending on the category of equipment.
■ For category 2, a copy of the technical conformity dossier is saved and archived for 10 years by a notified body. The archiving
number for the dossier is sent to the customer.
11.3 - System start-up, maintenance
■ The units must be installed and commissioned by a qualified professional.
■ All the provisions set out by the current directives and standards must be respected during installation, for example, automatically
linking the unit's supply to the presence of a flow rate detected by a sensor.
■ In all cases, refer to the general information section of this manual, to the specific manuals for the ATEX components built into the
unit and listed in the ATEX dossier, and to the specific precautions below:
- Install the units so that the temperatures at and around the intake are between -20°C and +60°C,
- The units and the additional metal elements must be connected electrically by a grounding cable linked to the frame,
- Select and install all the electrical connection and control components according to the risk zone in which they will be installed,
- All remote metal components (ducts, pipes, etc.) must be grounded, if necessary by grounding cables,
- The motor's heat protection must be connected (see § 9 – SYSTEM START-UP)
■ The installer must use all available devices to ensure that the temperature of the various elements of the installation remains below
the autoignition temperature of the gas and/or the dust in question.
■ If the connections for the various integrated equipment require wall feedthroughs (cable routing, sensors, etc.), these feedthroughs
must be sealed to prevent any diffusion of "ATEX" atmospheres. The same is true for the connections between the various blocks
which form the unit and for the connections to the ducts.
■ No modifications may be made to the unit without our prior consent.
■ Make sure, during assembly or maintenance operations, that no foreign objects are left inside the unit, to prevent dangerous
situations from arising (see § 11.4 Information concerning the use of tools in explosive atmospheres).
■ Prior to any maintenance operation, ensure that the unit is powered off.
■ After each maintenance operation, check that all the removed components have been refitted and secured in their original position.
■ Ensure that the ground straps are in good condition and reconnected.
■ Regularly inspect the mountings on the moving parts, including the enclosures and crankcases, as well as those on moving parts
such as the damper blades or filter runners.
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