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SECTION 9—SIEVE BEDS

Perfecto

™

44 Part No 1148070

SECTION 9—SIEVE BEDS

Replacing Sieve Beds

 DANGER

Topreventelectricalshock,AWAYSdisconnectconcentratorfromelectricaloutlet

beforeservicing.

NOTE:Forthisprocedure,refertoFIGURE 9.1onpage 45.

NOTE:ALWAYSreplacesievebedsinpairstoensurethatbothbedsareinoptimumcondition.

1. Unplugunit.

2. Removecabinet.RefertoRemovingCabinetonpage 23.

3. RemovecompressorinletHEPAfilter.RefertoReplacingtheCompressorInletHEPA

Filteronpage 26.

4. RemovetiewrapsanddisconnectP.Evalvetubingandcheckvalvetubingfromtop

ofsievebeds.

5. Removethefourlargetie‐wraps(twooneachsievebed).

6. Tiltsievebedsbackandliftup.Restsievebedsonrearofbase.

7. Usingahoseclamptool,removetheclampandreinforcedtubingfrombottomofboth

sievebedsandremovesievebeds.

CAUTION

DONOTremoveplasticcapsfromnewsievebedfittingsuntilreadytoinstallnewbeds.

Severesievecontaminationcanoccurifuncappedbedsareexposedtoair.

8. Removeplasticcapsfromthetopandbottomfittingsofthenewsievebeds.

9. InstallnewsievebedsreversingSTEPS3‐7.

NOTE:Afterreplacingsievebeds,retimingisnecessary.RefertoTiming

onpage 73.

10. Rununitandcheckforleaks.RefertoLeakTest

onpage 76.

11. Reinstallcabinet.RefertoRemovingCabinet

onpage 23.

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