Special Notes For Atex Zones; General Information; Marking; System Start-Up, Maintenance - CIAT Climaciat Instruction Manual

11 - Special notes for ATEX zones

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

11.1 General information

ƒ Evaluation of the level of danger of explosion established in accordance with standards EN 13463-1 and EN 1127-1 (see §
3 - REGULATIONS).
ƒ The units are certified as complying with the recommendations in standard EN 13463-5 "Protection by constructional safety 'c'
(see § 3 - REGULATIONS).
ƒ The user must classify the various potentially explosive areas in accordance with directive 1999/92/EC.
ƒ 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

ƒ Each unit is supplied with an ATEX Conformity Certificate; the ATEX marking is inscribed on the name plate as shown below:
II
- Example:
: Standardised ATEX logo.
II: Group II = surface industries.
2: Equipment category: 3 = installation in zone 2 or 22 , 2 = installation in zone 1, 2 or 22.
G: Equipment which can be installed in a gas zone.
D: Equipment which can be installed in a dusty zone, (* = only in zone 22 → category 3 equipment).
c: Constructional safety.
IIA/IIIA: Gas/Dust explosion group.
Group IIA, IIB, IIC gases (or IIB + H2 depending on the labelling on the integrated equipment if hydrogen present).
Group IIIA, IIIB, IIIC dust.
T5: Temperature class (T1 to T6 for gas, actual temperature for dust).
ƒ 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

ƒ The units must be installed and commissioned by a qualified professional.
ƒ 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.
ƒ 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)
ƒ 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.
ƒ 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.
ƒ No modifications may be made to the unit without our prior consent.
ƒ 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).
ƒ Prior to any maintenance operation, ensure that the unit is powered off.
ƒ After each maintenance operation, check that all the removed components have been refitted and secured in their original
position.
ƒ Ensure that the ground straps are in good condition and reconnected.
ƒ 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.
2 L/R* c
EN - 39
IIA/IIIA T5
EN