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AccuLoad IV Installation & Maintenance Manual
Maintenance
61
6 Maintenance
The following sections provide information about maintaining your AccuLoad IV to ensure optimal
functionality.
6.1 Explosion-Proof Enclosure Maintenance
AccuLoad ST and QT models with explosion-proof enclosures (with XP in the model code) should be
maintained using the following flame-path inspection criteria.
•
Installation, inspections, maintenance. repairs, overhauls, and reclamation of AccuLoads in the
European Union (EU) 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 and
regulations.
•
Installation, inspections, maintenance, repairs, overhauls, and reclamation of AccuLoads relying on
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 and
regulations.
•
Guidance for equipment inspection and maintenance is provided by EN/IEC 60079-17: Electrical Apparatus
for Explosive Gas Atmospheres, Inspection and Maintenance of Electrical Installations in Hazardous
Areas, and should be used for the inspection and maintenance process.
•
When performing maintenance that requires opening the enclosure cover, all flame paths (defined as
the machined-flanged surface between the housing and the cover), should be inspected to ensure that
they are clean, undamaged, and have no scratches, nicks, corrosion, or other defects that could affect
the integrity of the flame path. If defects are detected, the equipment should not be placed back into
service until the issues are resolved.
•
Verify that all tapped cover bolt threaded locations in the enclosure are clean and intact with no missing
or stripped threads.
•
Verify that the cover bolts are the required M8 x 1.25-6g, DIN 912, steel grade 12.9. Prior to
reassembly, apply a light coating of nickel-based anti-seize lubricant, such as Loctite Anti-Seize
Lubricant (TechnipFMC part number 646002-401) to all bolt threads.
•
Verify that any blind-threaded cover bolt holes do not have excessive grease or anti-seize lubricant
packed into them, as this could cause hydraulic fractures of the enclosure when the bolts are tightened.
•
Inspect to ensure that the environmental O-ring is correctly installed (seated into the groove) and in
good condition (no cracks, etc.). If the O-ring is defective, replace it to maintain environmental
protection. Grease the cover flange with petroleum jelly or Super Lube Multi-Purpose Synthetic Grease
with Syncolon (TechnipFMC part number 644886-401) before reattaching the cover to the housing.
•
Follow the cover bolt torquing procedure as outlined in
Section 5.1: Closing the Explosion-Proof
. When complete, verify the flame path gaps according to the procedure.
WARNING:
To prevent the ignition of hazardous atmospheres, disconnect the AccuLoad from its main
power supply before opening the cover.
Содержание Smith Meter AccuLoad IV
Страница 7: ...AccuLoad IV Installation Maintenance Manual Introduction 2 Figure 1 AccuLoad IV ST ...
Страница 9: ...AccuLoad IV Installation Maintenance Manual Introduction 4 Figure 3 AccuLoad IV QT ...
Страница 11: ...AccuLoad IV Installation Maintenance Manual Introduction 6 Figure 5 AccuLoad IV N4 ...
Страница 14: ...AccuLoad IV Installation Maintenance Manual Introduction 9 Figure 8 AccuLoad IV SA FCM ...