Invacare IRC5P Service Manual

SECTION 23—LEAK TEST
Perfecto
2
™
78 Part No 1148070
4 Way Valve Function Test
NOTE:Forthisprocedure,refertoFIGURE 23.1onpage 77.
The4‐wayvalveusedinthePerfecto2SeriesConcentratorsdoeshaveanacceptable
toleranceofleakageperRexRoth
®
.
Bynatureofthevalvedesignitispossibleforthevalvetoexperiencesmallleaks,andstill
operatewithoutaffectingtheoverallperformanceoftheunit.Thevalveisassembled
wherethecomponentsthatmakeupthevalve“Snap”together.Theonlyscrewsinthe
valveareforsecuring
thevalvetothemanifoldassembly.
AccordingtoRexRoththereisanacceptableleakspecificationof60ccperminuteat20
psioneachvalve.Valvesthathaveleakswithinthisspecificationwillfunctionproperly
withoutanyadverseeffectstotheperformanceoftheconcentrator.Aleakintheamount
of60ccorlesswouldbeindicativeofthetypeofsmallleakyouwouldnoticewherethe
endcapsconnecttothemainbodyorwherethethreepiecesofthemainbodyconnect
together.A60ccleakwouldnotbenoticeablewhenexaminingthesystempressure
swings.

Leaksgreaterthan60ccareindicativeofcracksintheendcaps,orablownsealwherethe
endcapconnectstothemainbodyofthevalve.Theseleaksaredetectedbyeitherreading
thesystemswingpressures,noticingtwoconsecutiveswingsnotbeingequalorby
hearinganaudibleleakeveryothercycle.Leaksofthisextremenatureindicatethevalve
needstobereplaced.
Valvesshouldonlyneedtobereplacedwhenthefollowingconditionsexist:
1. Avisiblecrackisnotedoneitheroftheendcapsormainbodyofthe4wayvalve,
regardlessoftheamountofleak.
2. Alargeleakispresentonthevalvethatcausesanimbalanceinthesievebedswing
pressures.Example:SieveBed1pressureswingsfrom14psito16psi,within7‐20
secondsandSieveBed2pressureswingsfrom13psito16psislowly,andmaytake
aslongas25‐30secondsbeforeshifting(timesover30secondwillshutdown
automatically).
3. Valvewillnotshiftandthepilotvalvesolenoidandcircuitboardareworking
properly.
NOTE:Theconcentrator’sP. C . B . shouldexhibitanerrorcodeforHighPressureFailure(1Red/
2Green).
NOTE:Thebestmethodtotestthe4‐wayvalveoperationisbymeasuringtheunitpressure
swings.ThiscaneasilybedoneattheHomeFillportwitha0‐30psipressuregaugeanda¼”fill
lineadapter.Uponstartingtheunitshouldbuildpressureupto16psifor
outputflows3L/min
andbelowor21psiforoutputflows4L/minandabovebeforeitsinitialshift.Aftertheinitialshift
theunitshouldshift consistentlyinequalamountsoftime+/‐1second(timerecordedinseconds).

Invacare IRC5P Specifications

General

Brand	Invacare
Model	IRC5P
Category	Medical Equipment
Language	English