Safety Instructions For Installation In Hazardous Area; Instructions For Explosion-Proof Enclosures - Emerson Keystone EPI2 63 Installation, Operation And Maintenance Manual

Section 4: Installation
October 2020
4.13 Safety Instructions for Installation in
Hazardous Area
4.13.1

Instructions for Explosion-Proof Enclosures

NOTE
Keystone EPI2 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:
•
•
•
•
NOTE
In case the screws of the cover, of the terminal compartment and of the OM3 must be
replaced, SS Aisi 316 Class A4 grade 80 screw must be used with minimum yield strength
600 N/mm², The screw size is M6 X 25 mm. Other screws used for the assembly of
the other various parts of the explosionproof enclosure shall be a SS AISI 316 Class A4
Grade 70, with minimum yield strength of 450 N/mm².
Every time the main cover, the terminal compartment cover and the OM3 are
reassembled, make sure to tight all the screws with 5 Nm torque.
24
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)
Installation, Operation and Maintenance Manual
MAN-10-04-100-0711-EN Rev. 0
Installation