GE FVP110 Maintenance Manual page 286

GE Energy
Repair
Prohibition of
specification changes
and modifications
If the flameproof apparatus requires repair, turn off the power and
transport it to a safety (non-hazardous) location. Observe the fol-
lowing points before attempting to repair the apparatus.
Make only such electrical and mechanical repairs as will
❑
restore the apparatus to its original condition. For the
flameproof apparatus, the gaps and path lengths of joints
and mating surfaces, and mechanical strength of
enclosures are critical factors in explosion protection.
Exercise great care not to damage the joints or shock the
enclosure.
If any damage occurs in threads, joints or mating surfaces,
❑
inspection windows, connections between the transmitter
and terminal box, shrouds or clamps, or external wiring
connections which are essential in flameproofness, contact
GE Masoneilan.
Do not attempt to re-process threaded connections or
refinish joints or mating surfaces.
Unless otherwise specified, the electrical circuitry and
❑
internal mechanisms may be repaired by component
replacement, as this will not directly affect the
requirements for flame-proof apparatus (however, bear in
mind that the apparatus must always be restored to its
original condition). If you attempt to repair the flameproof
apparatus, company-specified components shall be used.
Before starting to service the apparatus, be sure to check
❑
all parts necessary for retaining the requirements for
flameproof apparatus. For this, check that all screws, bolts,
nuts, and threaded connections have properly been
tightened.
Do not attempt to change specifications or make modifications
involving addition of or changes in external wiring connections.
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FVP 110 Fieldbus Valve Positioner Manual