December 2019
123
Installation, Operation and Maintenance Manual
VCIOM-08500-EN
Appendix
Appendix
A.8.1
Periodic Inspection
•
Inspect the general condition of the ICON3000/3000AD at regular intervals. The
recommended frequency of inspection is once every two years but this frequency
could change depending on the installation and working conditions. Any crack on
the surface, broken windows, 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 is to be followed
(ensuring in particular that the dust layer does not exceed 5 mm.)
•
If the actuator is covered by an intumescent coating ("Kmass"), an electrostatic
charge risk is present; only anti-static cloth may be used when cleaning is
required. When performing maintenance, avoid rubbing actions against the
actuator (or any other friction-inducing action) that could electrostatically
charge the unit.
•
Check the condition of cable connections and mounting bolts; any loose
connection must be tightened.
A.8.2
Disassembly and Re-assembly
CAUTION
Using a fastener other than the approved type may result in damage to the actuator or
valve. Refer to Table 7.
CAUTION
Failure to use proper torque values can result in damage to the actuator and/or valve.
If disassembly and subsequent re-assembly of the explosion-proof enclosure is required,
take the necessary care to maintain all parts in their original condition.
To achieve this, the following steps must be taken:
•
Do not damage the explosion-proof mating surfaces on the housing or on the
electrical enclosure cover.
•
Reinstall all the screws that came with the dismantled parts and coat them with a
film of molybdenum-based grease. This will prevent the screws from sticking and
make future maintenance operations easier.
•
If the screws need to be changed, the new screws must be of equal dimensions
and at least equal material quality to the screws originally supplied with the unit.
•
Replace the weather-proof seals that may have been removed, i.e. O-Rings
for the cover.
•
In particular, be sure to spread a film of Aeroshell grease over the joint surfaces of
all enclosures.
