Service
6.5.2ReplacingSieveBeds(IRC5PO2VAW)
DANGER!
RiskofDeath,Injury,orDamage
Topreventelectricalshock
–ALWAYSdisconnectconcentratorfromelectricaloutletbeforeservicing.
ALWAYSreplacesievebedsinpairstoensurethatbothbedsareinoptimumcondition.
TherearetwoconfigurationsofthePEvalveassembly,acircularshapePEvalveassembly(ItemB)andarectangularshapePEvalve
assembly(ItemB).OnlythecircularshapePEvalveassemblyisshownintheunit.
Dependingondateofmanufacture,thecircularshapePEvalveassemblywilleitherbelocatedinthemiddleofthetwosievebeds
orshiftedclosertotheleftsievebedasshown.
TherectangularshapeofthePEvalveassemblywillalwaysbelocatedclosertotheleftsievebed.
1.TurnpowerOff(O)andunplugtheunit.
2.Removecabinet.Referto6.1RemovingCabinet,page17.
3.RemovecompressorinletHEPAfilter.Referto5.3ReplacingtheOutletHEPAFilter,page13.
4.RemovetiewrapsAanddisconnectPEvalveassemblyBandcheckvalveassemblyCfromtopofsievebedsD.
5.RemovethefivelargetiewrapsE.
6.Removesievebedtopadaptors,tiltsievebedsbackandliftup.Restsievebedsonsievebedbottomadaptors.
7.Usingahoseclamptool,removetheclampFandreinforcedtubingGfrombottomofbothsievebedsandremovesievebeds.
8.Removeplasticcapsfromthetopandbottomfittingsofthenewsievebeds.
9.InstallnewsievebedsreversingSTEPS3-8.
10.Rununitandinspectforleaks.Referto8.1LeakTest,page41.
11.Ifnoleaksdetected,turnpowerOff(O)andunplugtheunit.
12.Reinstallcabinet.Referto6.1RemovingCabinet,page17andreverseallsteps.
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