BIFFI EFS2000v4 - Page 8

8
BIFFI FAIL SAFE ELECTRIC ACTUATORS, MODEL EFS2000V4
InstructIon and operatIng Manual
6.5 Safety instructions for installation in
hazardous area
6.5.1 Instructions for the explosion-proof
enclosures
IMPORTANT
Electric Actuator EFS2000v4 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 explosion-proof
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.
6.5.2 Installation in ambient temperature with
explosive dusts
IMPORTANT
Electric Actuator EFS2000v4 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 IEC/EN60079-10 (hazardous area
classification).
Example: IEC/EN 60079-14 (electrical installation),
IEC/EN 60079-17 (maintenance).
Special attention must be paid to the following
points:
• Before assembly, the joint surfaces must be
greased with silicon oil or equivalent.
• The cable glands must have a protection
degree at minimum IP66/68 (EN 60529).
• Periodically verify the layer of dust deposited
on the enclosure and clean it in case the layer
is more than 5mm.
6.4.1 Entries on the manually operated electrical
switch enclosure
6.4.2 Entries on the electro-magnetic clutch
device enclosure
Procedure to be followed:
• Do not damage the explosion-proof 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.
IMPORTANT
In case the screws of the cover or other parts
relevant to the explosion-proof protection must
been replaced check that new bolts and/or screws
are of the same dimension and quality as the
original ones as stated on the list of material
included on this manual, or of a better quality. 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
.
WARNING!
Do not electrically operate the EFS2000v4 when
the electrical enclosures are removed. Operating
the unit with the electrical enclosures removed
could cause personal injury.
• Replace the weatherproof seals that may
have been removed (O-ring for the covers,
O-ring forthe explosion-proof joint of the
motor).