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© Copyright by BIFFI Italia. All rights reserved.
A !@#$ INTERNATIONAL LTD. COMPANY
F02 Quarter-turn Electric Actuators
instruction and operating manual
4.13 Safety Instructions for Installation in Hazardous Area
4.13.1 INSTRUCTIONS FOR EXPLOSIONPROOF ENCLOSURES
Important:
F02 electric actuators must be installed and maintained
according to the applicable Rules regarding the electrical
installation in hazardous areas (other than mines) classified as
zone 1 and/or 2 (gas) and zone 21 and/or 22 (dust) according
to EN 60079-10 (hazardous area classification).
Example: EN 60079-14 (electrical installation), EN 60079-17
(maintenance).
During the dismantling and subsequent reassembling of the explosionproof enclosures
(covers, cable glands, joints) be careful to bring these enclosures back to their original
condition to maintain their integrity. In particular, be sure the joint surfaces of all enclosures
are spread with a film of recommended grease.
Proceed as follows:
• Do not damage the explosionproof mating surfaces on the housing and on the electrical
enclosure covers.
• Reinstall all the screws that go with the dismantled parts, and block them with a thread
sealant after spreading them with a film of copper- or molybdenum-based grease. This
will keep screws from sticking and make maintenance operations easier.
• Check that the bolts and screws are the same dimension and quality as the original ones
(as stated on the nameplate), or a better quality.
• Replace the weatherproof seals that may have been removed (O-Ring for the covers).
Important: In case the screws of the cover must be replaced, SS Class
A4 grade 70 screw must be used with minimum yield strength
450 N/mm
2
Warning: Do not electrically operate the F02 when the electrical
enclosures are removed. Operating the unit without electrical
enclosures could cause personal injury.
4.13.2 INSTALLATION IN ENVIRONMENT WITH EXPLOSIVE DUSTS
Important:
F02 electric actuators must be installed and maintained
according to the applicable Rules regarding the electrical
installation in Hazardous areas (other than mines) classified as
zone 21 and/or 22 (dust) according to EN 60079-10 (hazardous
area classification). Example: installation and maintenance
according to EN 50281-1-2.
Special attention is requested to the following:
• before the assembly the joint surfaces must be greased with silicone oil or equivalent.
• cable glands must have minimum protection degree IP6X (EN 60529).
• periodically verify the quantity of dust deposited on the enclosure and clean it if more
than 5mm. using a damp cloth to avoid static electricity.
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