EngA AF Series

A
AF / DCU MANUAL
IOM-52 19 of 23 Apr 13 R2
MAINTENANCE
Warning: Thisunitisconnectedtohighvoltages.Electricalshockordeathcouldoccurif
instructionsarenotfollowed.Thisequipmentcontainsmovingpartsthatcanstart
unexpectedly.Injuryordeathcouldoccurifinstructionsarenotfollowed.Allwork
shouldbeperformedbyaqualifiedtechnician.Alwaysdisconnectandlockoutpower
beforeservicing.DONOTbypassanyinterlockorsafetyswitchesunderany
circumstances.
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Toprovideamaintenancehistory,Itisrecommendedthattheownerhaveamaintenancefileforeach
unit.Thefollowingmaintenanceinstructionsaretobecarriedouteachspringandfallorasotherwise
indicatedbyqualifiedservicepersonnel.
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Caution:
Labelallwirespriortoremovalwhenservicingcontrolsorcriticalcomponents.Wiring
errorscancauseimproperanddangerousoperation.

Verifyproperoperationafterservicing.
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HERESITE
®
MAINTENANCE
Heresite
®
isabakedonphenoliccoatingusedtoprotectmetalsfromsomeformsofchemicalcorrosion.
Atthetimeofpurchasenewcoilscan,asanoption,haveHeresite
®
appliedatthefactory.

IfyouhaveaHeresite
®
coatedcoil:
 Inspectonceperyearormoreoftenasrequired.
 Cleanwithlowpressureairandvacuumwithasoftbrush.
 Lowpressure,chemicalfreewatermaybeused.

RepairInstructions(usingair‐driedHeresite
®
touch‐upspray):
1) Ensuresurfacesarecompletelydry.
2) Useanylonbrushtoremoveanyloosescale.
3) Roughenupareastoberepairedwithawirebrush.
4) Vacuumfinsortheaffectedareatoensureanylooseresidueisgone.
5) SprayorbrushS‐440solvent*(oranyequivalentcleaner)todissolveanyoilsorgrease.
6) Again,vacuumtheaffectedarea.
7) Allowonehourforthesolventtodissolvecompletely.
8) Coverareasnotrequiringrepairwithplastic(orequivalent)andmaskingtape.
9) UsingHeresite
®
VR‐554‐T*coatingsprayallaffectedareasfromdifferentanglestoensure
completecoverage.Apply2‐3fullcoats.Letdry3to4hoursbetweencoats.
10) AllowHeresite
®
tocure24hoursbeforeputtingequipmentbackintoservice.
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*ReviewtheMSDSdocumentationincludedwiththesolventandcoatingspray.