Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 25
MPU
Series
C
I/O/M
Manual
Operation
3.11.
Explosion-proof housing closure
When securing the front cover of the UMC, TCI or UMH enclosure, use the following
procedure to ensure the unit is properly sealed and is safe to operate in the hazardous
environment:
1. Inspect the door seal O-ring for damage and replace if damaged. The O-ring is not
required to maintain the explosion-proof rating; however, it is required to maintain the
IP 65 ingress protection rating. Grease cover flange with petroleum jelly or
TechnipFMC grease (P/N 644886401) before attachment of the cover to the housing.
2. Verify the mating areas between the front cover and the main housing are not
scratched, corroded or otherwise damaged such that the surface contact between
them would be compromised.
3. Close the cover and tighten the bolts around the perimeter of the front cover. The final
torque should be 70 IN-LB (8 Nm) for the UMC / TCI enclosure type (pedestal style).
• UMH alternate enclosure type (depicted below) - Once the cover is fitted, ensure
that all the fasteners are present and fully tightened.
• Cover Bolt Torque requirement:
• Aluminum enclosure 20 Nm
• Stainless steel enclosure 25 Nm
(UMH style alternate enclosure)
4. Check that the enclosure is properly sealed by verifying the cover to enclosure joint
“gap” with a 0.0015" (0.038mm) feeler gauge. The feeler gauge must not enter the
joint for more than a ¼" (6mm) at any point around the perimeter of the cover to
housing joint.
3.12.
Flame Path Inspection Criteria
Warning:
To prevent ignition of hazardous atmospheres, disconnect from mains power
supply before opening the cover.
I. Installation/inspection/maintenance/repair/overhaul/reclamation of the MPU in the
European Union must be performed by qualified personnel in accordance with the
applicable requirements of EN 60079-14, EN 60079-17, and EN 60079-19 in addition
to all local codes/regulations.
II. Installation/inspection/maintenance/repair/overhaul/reclamation of AccuLoad’s
relying upon the IECEx certification must be performed by qualified personnel in
accordance with the applicable requirements of IEC 60079-14, IEC 60079-17, and
IEC 60079-19 as required by local codes/regulations.
Содержание Smith Meter MPU 1600c
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