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9. Before starting
Make sure the unit has been correctly settled and not damaged
Make sure the wiring and the tightening of the terminal screws have been performed properly (see
descriptive tightening torque)
The device may include any foreign body and no part is damaged
The cable gland must be tightened (see description of the gland torque)
10. Maintenance
The maintenance and repairs works on devices must be made only by authorized and trained persons for
that purpose.
Before any technical intervention the devices must be switched off.
Prevent and avoid any formation of layers of dusts: make a periodic cleaning with a wet cloth
Do not take apart the command and control units (push buttons, pilot light, etc.)
The following checks must be made at least once a year:
The outdoor equipment and surfaces must not be damaged
The cable entries and blanking plugs must be threaded
Check tightness of the connections, rewiring if necessary
Prior to closing, check the cleanliness of the flame path (machined part of the cover in contact the
machined part of the box). Grease these 2 parts with a grease resistant to oxidation (OPAL - Siberia,
for example)
Screw the cover on the box using the stainless steel bolts A4-70 minimum. Ensure that all the bolts are
screwed. After tightening the bolts, check with a shim of 15/100 mm (4/100mm for IIB + H2)all around
the flam path that the shim cannot penetrate the enclosure. Its non-penetration on full perimeter is the
insurance of the conformity of the product with the standards
It is also necessary to observe the regulations in the country of use.
11. Special conditions for safe use when the intrinsically safe equipment is installed in the
flameproof enclosure
When the enclosure is equipped with intrinsic safety elements, a temperature probe must also be fitted
inside and be connected to a system that can switch off the supply when the inner temperature raises the
maximum ambient temperature indicated in the certificates of the IS elements.
The products that can be connected to the IS elements installed inside the enclosure must be certified type
and association must be compatible in regards of intrinsic safety.
DE8126A12 – 10 – 01/12/2016
Operating instructions
Flameproof enclosure - DE8BC series
ENG
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