SECTION 9—SIEVE BEDS
Perfecto244 Part No 1148070
SECTION 9—SIEVE BEDS

Replacing Sieve Beds

DANGER
Topreventelectricalshock,AWAYS disconnectconcentratorfromelectricaloutlet
beforeservicing.
NOTE:Forthisprocedure,refertoFIGURE 9.1onpage 45.
NOTE:ALWAYSreplacesievebedsinpairstoensurethatbothbedsareinoptimumcondition.
1. Unplugunit.
2. Removecabinet.RefertoRemovingCabinetonpage 23.
3. RemovecompressorinletHEPAfilter.RefertoReplacingtheCompressorInletHEPA
Filteronpage 26.
4. RemovetiewrapsanddisconnectP.E valvetubingandcheckvalvetubingfromtop
ofsievebeds.
5. Removethefourlargetiewraps(twooneachsievebed).
6. Tiltsievebedsbackandliftup.Restsievebedsonrearofbase.
7. Usingahoseclamptool,removetheclampandreinforcedtubingfrombottomofboth
sievebedsandremovesievebeds.
CAUTION
DONOTremoveplasticcapsfromnewsievebedfittingsuntilreadytoinstallnewbeds.
Severesievecontaminationcanoccurifuncappedbedsareexposedtoair.
8. Removeplasticcapsfromthetopandbottomfittingsofthenewsievebeds.
9. InstallnewsievebedsreversingSTEPS37.
NOTE:Afterreplacingsievebeds,retimingisnecessary.RefertoTimingonpage 73.
10. Rununitandcheckforleaks.RefertoLeakTest onpage76.
11. Reinstallcabinet.RefertoRemovingCabinetonpage 23.