Special Information For Atex Areas; General Information - Carrier 42AM ATEX serie Installations-, Betriebs- Und Wartungsanleitung

7 - SPECIAL INFORMATION FOR ATEX AREAS

In accordance with directive 2014/34/EU (explosive atmospheres)

7.1 - General information

Evaluation of the level of danger of explosion established in accordance with standards EN 13463-1 and EN 1127-1.
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 be operated under conditions other than those for which it was designed.
Labelling
Each unit is supplied with an ATEX certificate of conformity. The ATEX labelling is affixed to the data plate as shown below :
II 2/3G Ex h IIB / IIC (or IIB + H 2 ) T...°C or TX Gb/Gc (*)
E.g. :
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:
Explanation of the labelling:
: Standardised ATEX logo
-
- Group II devices: For surface industries.
- Category of equipment (2 or 3 depending on zone 1 or 2).
- Ex h: Regulatory markings according to standard NF EN ISO 80079-36:2016
- Subdivision of gas group IIA, IIB or IIC.
The IIB labelling is suitable for subdivisions of gas groups 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).
• or 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.
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 specific manuals for the ATEX components built into the unit and the specific precautions below :
- Install units so that the room temperature is between -20 and +40 °C.
- 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 (pipes, etc.) must be grounded, if necessary by grounding cables.
- Heat protection is compulsory for the motor (not supplied). This must be connected by the installer (away from the ATEX area).
See Note in the section on electrical connection.
- 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 in question.
Any modification to the unit is prohibited.
Ensure that, during assembly or maintenance operations, no element (tools, screws, components, etc.) are left in the unit, as this
could cause a dangerous situation to arise (see section 22.3).
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 check that the removable parts (e.g. fan motor assembly, impeller) are securely fastened.
Exchanger coils :
The temperature of the fluids circulating in the coils must not exceed the value given on the unit's name plate.
It must be below the surface temperature limit (or temperature class) corresponding to the ATEX atmosphere for which the unit is
certified (see labelling)
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