BAC 3985C User Manual

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• Thestorageareashouldbefreefromambientvibration.Excessivevibrationcancause
bearingdamage.
• Precautionsshouldbetakentopreventrodents,snakes,birds,orothersmallanimals
fromnestinginsidethemotors.Inareaswheretheyareprevalent,precautionsmust
alsobetakentopreventinsectsfromgainingaccesstotheinteriorofthemotor.
• Ifnotstoredindoorsinacontrolledenvironment,someformofheatingmustbe
utilizedtopreventcondensationfromaccumulatinginthemotor.Thisheatingshould
maintainthewindingtemperatureataminimumof9ºF(-12.8ºC)abovetheambient
temperatureofthesurroundingenvironment,keepingitfromdroppingbelowthedew
pointwherecondensationcouldforminsidethemotor.Ifspaceheatersaresupplied,
theyshouldbeenergized.Requesttherequiredvoltageandtransformercapacityfrom
yourlocalBACRepresentative.Athirdoptionistouseanauxiliaryheatsourceand
keepthewindingwarmbyeitherconvectionorblowingwarmairintothemotor.
• Rotatethemotorshaftmonthlytoredistributebearinggrease.
Maintenance Requirements
• Rotateallfansandmotorshaftsmonthlybyhand.Hand-turningwillensurethatthe
shaftsandbearingsarefreeandwillredistributegreasewithinthebearings.Keep
handsawayfrompinchpointssuchasboltsandsheaves.
• Inspectthecoldwaterbasinmonthlytoensurethatthedrainisopenandremoveany
leavesordebristhatmayhaveaccumulatedinthecoldwaterbasin.
• Inspectaxialfanspriortostart-upandatleastonceannuallytoensurethattheblades
aretightandthatthereisnoobviouscorrosionbetweenthehubandthefanblade.
• Inspecttherustpreventativecoatingonallmotorexternalmachinedsurfaces
includingshaftextensionsmonthly.Ifnecessary,re-coatthesurfaceswithRUST
VETO
®
.
Start-Up Preparation After Prolonged Storage
Keepinmindthatstart-upproceduresafterlongperiodsofstoragearejustasimportantas
pre-shutdownprocedures.
• Motorsshouldbethoroughlyinspectedandcleanedandrestoredtopre-storage
condition.
• Inspecttheaxialfanpriortostart-uptoensurethatthebladesaretightandthatthere
isnoobviouscorrosionbetweenthehubandthefanblades.Donotenergizethefan
ifthereisobviouscorrosionoffancomponents.Loosefanbladescouldresultinfan
failureandpossibleinjuryordamage.
• Reinstallallfanbelts,motors,doorgaskets,anddrainplugs(asapplicable),and
removeallprotectivecoverings.
• Forunitsstoredpriortoinstallation,conductriggingproceduresasdirectedinthe
unit’sRigging and Assembly Instructions,availableonwww.BaltimoreAircoil.comorby
contactingyourlocalBACRepresentative.
• Performaninsulationtestofmotorwindingstoensuresatisfactoryinsulation
resistance.
• Conductfullstart-upprocedureasstatedinthe“Start-UpProcedure”onpage 4.Be
especiallythoroughforcleaningandinspectionpriortostart-up.
• Forunitswiththeoptionalgeardrivesystem,thegearboxmustbefullydrained,
thenrelledwithnewoilatornearthemiddleoftheoillevelsightgaugetoprevent
damage.Then,followthestepsin“InitialStart-up”onpage 13.
DANGER: Do not perform any
service on or near the fans, motors
and drives, or inside the unit
without first ensuring that the
fans and pumps are disconnected,
locked out and tagged out.

BAC 3985C Specifications

General

Brand	BAC
Model	3985C
Category	Air Conditioner
Language	English