Invacare IRC5P - Replacing Pilot Valve Poppets and O-Rings

SECTION 20—4-WAY VALVE/MANIFOLD ASSEMBLY
Perfecto
2
™
68 Part No 1148070
Replacing Pilot Valve Poppets and O-Rings
 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.
 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.