
4
OM3510
OPERATION
A. PRESSURE SWITCH ADJUSTMENTS
1. The pressure switch is preset at the factory to indicate (light on)
dirty filters, but may need readjustment due to a desire for earlier
orlaterfilterchanges,adifferentcombinationoffilters,orbecause
thesetpointshiftedduringshipping. Thepressureswitchisalso
orientationsensitive. Toreadjusttheswitch,removethehole
pluginthesideoftheunitforaccesstotheadjustmentscrew.
Makesurefiltersandpre-filtersareinstalledinunit. Turntheunit
onandplaceapieceofcardboardovertheintakecoveringabout
80to85%oftheintakearea. Ona3-inletsystem,cover
entirelytwoinletsandalittlemorethanhalfoftheareaofthethird
inlet. Withastandardscrewdriver,turntheadjustmentscrew
clockwiseuntilthelightgoesoff,orcounterclockwiseuntilthe
lightcomeson.
2. Formoretimebetweenfilterchanges(lessairflow),cover
slightlymoreoftheopening,andforlesstimebetweenfilter
changes(moreairflow),coverlessoftheopening.
B. GENERAL MAINTENANCE
1. Occasionallychecktheconditionofthedrivebeltfortightness
andwear.
2. Checktheblowerbearingsforunusualwearandtheblower
wheelfordebrisanddirt. Cleanwhennecessary.
3. Checkthewiringforlooseconnectionsorcrackedinsulation.
4. Nolubricationisrequiredforthemotorbecauseitisapermanent
pre-lubedesign. Excessivedirt/oilshouldbeperiodically
removed.
5. Makesureoilisdrainingeasilythroughdrainpipe.
C. CHANGING FILTER
CAUTION: Always make sure that the unit is turned off before
changing filters or servicing the unit.
1. TheOM3510isequippedwithafilterchangelight,or(optional)
MagnahelicGauge,whichindicateswhenafilterneedstobe
replaced. Ifthedifferentialpressurehasbeensetproperly,the
light,orgaugesignalstheneedforexaminationofthefilters.
2. Whenthelightcomeson,orgaugereadshighdifferential
pressure, turntheunitoffandremovetheimpingerandmesh
pre-filterfromtheunit. Washthesepre-filtersinadetergent
solutiontoremovedirtandoilresidue.
3. Rinsethepre-filtersthoroughlywithwater, shakedryand
replaceintheunitwithairflowdirectionpointingtotheblower
(replacepleatedpre-filtersifinuse).
4. Ifthefilterchangelightfailstogoout,orthegaugecontinuesto
readhighdifferentialpressure,afterreplacingthepre-filter,then
theoilbagfiltermayalsoneedtobereplaced.
5. Visuallyinspectthebagfilter. Ifthepocketsareloadedwithoil
anddirt,thenremovethefilterfromthechannelandinsertanew
filter.
6. Starttheunit.Thefilterchangelightshouldbeoff,orthegauge
readslowdifferentialpressureandtheunitshouldbeoperating
properly.
INSTRUCTIONS FOR SIDE DISCHARGE
BLOWER EXHAUST ON OM 3510
CAUTION: Read instructions completely before making changes.
1. TheOM3510motor/blowermodulecanberotatedsothatexhaustair
exitsfromthesideoftheunit. Beforerotatingmotor/blowermodulebe
surethatallinputpowerisdisconnectedandunitisturnedoff.
2. Removemotoraccessdoorandexhaustgrille.
NOTE: Careisrequiredwhenremovingthepaneltoprotectthebloweroutlet
gasket.
3. Remove5/16”hexboltsandwashersthatsecuremotor/blowermodule
tofiltermodule.
4. Rotatemotor/blowermodule90°asshownInfigure 6.
5. Using5/16”hexboltsandwashersre-securemotor/blowermodule
withfiltermodule.
CAUTION: Due to relocation of internal components, some wiring
may be loose. Be sure to retain wires so they will not become loose in
air stream of blower inlet.
6. Reinstallmotoraccessdoorandexhaustgrille.
NOTE: Careisrequiredtoprotectbloweroutletgasket.
7. Reconnectinputpowerandturnuniton. Checkforproperairflowand
blowerrotations.
FIG.6