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Invacare IRC5PO2 Oxygen Equipment User Manual

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SECTION 20—4-WAY VALVE/MANIFOLD ASSEMBLY

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68 Part No 1148070

Replacing Pilot Valve Poppets and O-Rings

ƽ DANGER

Topreventelectricalshock,ALWAYSdisconnectconcentratorfromelectricaloutlet

beforeservicing.

NOTE:Forthisprocedure,refertoFIGURE 20.2onpage 70.

1. Unplugunit.

2. Removecabinet.RefertoCabinetonpage 23.

3. Removethe4‐wayvalve/manifoldassembly.RefertoReplacing4‐WayValveand/or

ManifoldAssemblyonpage 65.

4. Locatepilotvalveon4‐wayvalve/manifoldassembly.

5. Holdpilotvalvestemwiththeflatbladescrewdriverandturnthe9/16‐inchlocknut

counterclockwiseonecompleteturn.

6. Unscrewthepilotvalvestemassemblyfromthemanifoldwhileleavingthecoilwith

yokeandlocknutintactonstem.

7. Removepilotvalvepoppetfrominsidethepilotvalvestem.

CAUTION

DONOTremovethecoilyokefromthecoil.Thewasherbetweenthebottomoftheyoke

andthebottomofthecoilMUSTnotberemoved.Otherwise,componentsmaybe

damagedinreassembly.

8. Setasidethecoilwithyokeandpilotvalvestemassemblywiththewiresstillintact.

ƽ WARNING

DONOTusesharptoolstoremoveO‐ringfromplasticmanifoldopening.Damagetothe

plasticmanifoldand/orplasticmanifoldairflowpassagemayoccur.Damagetoairflow

mayresultinimproperoxygendeliveryandharmtotheuser.RefertoDetail“A” in

FIGURE 20.2.

9. RemovepoppetandO‐ringfrommanifoldopening(Detail“A”).

10. DiscardoldpoppetandO‐ring.

11. InstallnewO‐ringintotheopeningintheplasticmanifoldhousing(Detail“A”).

CAUTION

DONOTovertightenpilotvalvestemwheninstallingitintoplasticmanifold.Damageto

therubberʺOʺringand/orplasticmanifoldmayoccur.

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