5
Biffi
ICON 2000 / ICON 2000 AD
Addendum A to InstructIon And operAtIng mAnuAl
8.3 repAirS
When needed, repair must only be carried out
with manufacturer’s original spare parts�
WArning
The values of gaps of explosion-proof joints are
lower than the maximum specified on tables
of IEC/EN 60079-1 Standard and the values of
widths of the explosion-proof joints are superior
to the values specified on tables of the Standard
IEC/EN 60079-1. In case the maintenance should
require the replacement of any component which
forms part of an explosion-proof joint, only an
original spare provided by Biffi MUST be used.
Direct repair or reconstruction of the above
components are not permitted without the Biffi
permission. Not performing this procedure will
invalidate the product safety and contractual
guarantee.
Original spare parts must be required to the
manufacturer: to ensure that right spare
is provided, serial number printed on the
ICON 2000 unit enclosure label must be
specified when spares are ordered�
8.2 diSMAnTling And reASSeMBling
WArning
In case the screws of the cover must been
replaced, a SS AISI 316 Class A4 Grade 70,
must be used with minimum yield strength of
450 N/mm
2
.
In case a dismantling and subsequent
reassembling of the explosion-proof enclosure
is required, be careful to maintain all parts in
their original condition�
So the following procedure must be followed:
• Do not damage the explosion-proof mating
surfaces on the housing and on the electrical
enclosure cover�
• Reinstall all the screws that go with the
dismantled parts and block after spreading
them with a film of molybdenum-based
grease� This will keep screws from sticking
and make maintenance future operations
easier�
• In case the screws need to be changed it is
mandatory to assure that the new screws are
of the same dimension and same material as
the original ones as stated in this manual, or
of a better quality�
• Replace the weatherproof seals that may
have been removed i�e: O-rings for the cover�
• In particular, be sure the joint surfaces of all
enclosures are spread with a film of Aeroshell
grease�
8� MAINTENANCE
WArning
In case the units equipped with extension
for additional entry or additional entries,
already installed in HAZARDOUS AREAS, need
maintenance and/or any repair work, this must be
carried out by personnel specifically qualified and
fully trained for works in HAZARDOUS AREAS.
8.1 periodiC inSpeCTionS
• Inspect the general conditions of the
ICON 2000 / ICON 2000 AD plus the possible
optional additional extension at regular
intervals: recommended frequency of
inspection is one time every two years but this
frequency could be changed depending on the
installation and working conditions: any crack
on the surface, broken window or loose bolts
must be reported for repair�
• Keep the external surfaces of the unit clean:
if the unit is installed in a dusty environment
the specification stated in IEC/EN 60079-14
to be followed ensuring in particular that the
dust layer does not exceed 5 mm�
• Check the condition of cable connection and
mounting bolts: any loose connection must be
amended�
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