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MAINTENANCE
EXPOSURE TO SOME CHEMICALS MAY DEGRADE SEALED
DEVICES; The relay RLY1 on the overtemp board is classified as
a "sealed component" with regard to type n methods of flameproof
protection. The case is made of PBT and LCP plastics and is sealed
with a Bisphenol-A type epoxy resin. This combination provides
excellent chemical resistance, but because this device cannot be con-
sidered hermetically sealed, brazed or welded construction, one must
consider that certain chemicals or solvents in the area may be able
to degrade the seal on this component. The user should periodically
check the relay for any signs of cracking or corrosion of this compo-
nent and replace this board if degradation is found.
SUBSTITUTION OF RLY1 MAY IMPAIR SUITABILITY FOR USE IN
HAZARDOUS AREAS. replace only with the same type - AMETEK
part number 25869JE.
EXPLOSION HAZARD! Do not remove or replace components un-
less power has been disconnected or the area is known to be free of
ignitable concentrations of flammable gases or vapors.
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Maintenance
6-1
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