Merits Q155 User manual

-

Q155 Service Manual
-i-
TableofContents
1.Introduction 1-1
1.1.IntendedUse...............................................................................................1-1
1.2.HowtoUseService Manual.......................................................................1-1
1.3.SafetyRules...............................................................................................1-2
1.3.1.Warning..............................................................................................1-2
1.3.2.Precaution...........................................................................................1-2
1.4.Warranty.....................................................................................................1-3
1.5.Specifications.............................................................................................1-4
2.PatientInstructions 2-1
2.1.Unpacking..................................................................................................2-1
2.2.Check.........................................................................................................2-1
2.3.RoutineMaintenance bythepatient............................................................2-2
2.3.1.GeneralCaring....................................................................................2-2
2.3.2.CleaningCabinetAirIntakeFilter.......................................................2-2
2.3.3.Humidifier..........................................................................................2-1
3.Operation 3-1
3.1.DescriptionofOperation.............................................................................3-1
3.2.ExteriorParts..............................................................................................3-2
3.3.Handling.....................................................................................................3-3
3.3.1.Selectalocation..................................................................................3-3
3.3.2.Plug inpowercord..............................................................................3-3
3.3.3.Connecthumidifier(ifprescribedbyyourphysician)..........................3-4
3.3.4.Startup...............................................................................................3-5
3.3.5.Adjustflowrate..................................................................................3-5
3.3.6.Oxygenpurityindicator......................................................................3-5
3.3.7.Startoxygentherapy...........................................................................3-5
3.4.AlarmSystem.............................................................................................3-5
3.4.1.PowerFailureAlarmTest....................................................................3-6
3.4.2.LowPressureAlarmTest....................................................................3-6
3.4.3.HighPressureAlarmTest....................................................................3-6
3.4.4.OverheatingAlarmTest......................................................................3-7
4.Service 4-1
4.1.Components................................................................................................4-1
4.2.CabinetRemoval........................................................................................4-1
4.2.1.Removing thecabinettoaccess theaircompressor.............................4-1
4.2.2.CasterReplacement............................................................................4-1
4.3.UnitBlockReplacement.............................................................................4-2

Q155 Service Manual
ii
4.3.1.SolenoidValveAssemblyReplacement...............................................4-2
4.3.2.SolenoidCoil Replacement.................................................................4-1
4.3.3.SieveBedReplacement.......................................................................4-2
4.4.Compressor................................................................................................4-3
4.4.1.CompressorMaintenance....................................................................4-3
4.4.2.CompressorAssemblyReplacement....................................................4-3
4.4.3.CompressorReliefValveTestandReplacement..................................4-4
4.4.4.CapacitorReplacement.......................................................................4-5
4.5.AxialFanReplacement...............................................................................4-6
4.6.CircuitBoardReplacement.........................................................................4-7
4.6.1.CircuitBoardRemoval.......................................................................4-7
4.6.2.CircuitBoardInstallation....................................................................4-8
4.6.3.OxygenSensorCircuitBoardRemoval...............................................4-8
4.6.4.OxygenSensorCircuitBoardInstallation...........................................4-9
4.7.ProductRegulatorSettingandReplacement................................................4-9
4.8.CircuitBreakerReplacement.....................................................................4-10
4.8.1.CircuitBreakerRemoval....................................................................4-10
4.8.2.CircuitBreakerInstallation................................................................4-11
4.9.ON/OFFPowerSwitchReplacement.........................................................4-11
4.9.1.ON/OFFPowerSwitchRemoval.......................................................4-11
4.9.2.ON/OFFPowerSwitchInstallation....................................................4-12
4.10. OxygenMonitorLEDReplacement...................................................4-12
4.11.HourMeterReplacement...........................................................................4-12
4.12. FlowmeterReplacement....................................................................4-13
4.12.1.FlowmeterRemoval..........................................................................4-13
4.12.2.FlowmeterInstallation......................................................................4-14
4.13. BuzzerReplacement..........................................................................4-14
4.14. OperatingPressureTest......................................................................4-15
4.15. HighOperatingPressure....................................................................4-15
4.16. LowOperatingPressure.....................................................................4-15
4.17. LeakTestProcedure...........................................................................4-16
5.Maintenance 5-1
5.1.RoutineMaintenance..................................................................................5-1
5.2.CabinetAirInletFilter................................................................................5-1
5.3.AirIntakeFineParticleFilter......................................................................5-1
5.4.BacteriaFilterReplacement........................................................................5-2
6.Troubleshooting 6-1
7.SpareParts 7-1
8.ToolKit 8-1
AppendixA:ExplodedDrawings ......................................................................A-1

Q155 Service Manual
-iii-
ListofIllustrations
Figure2-1Unpacking.............................................................................................2-1
Figure2-2PositionofCabinetFilter......................................................................2-3
Figure2-3CleanCabinetFilter..............................................................................2-1
Figure3-1Process Schematic.................................................................................3-1
Figure3-2Cabinet.................................................................................................3-3
Figure3-3PowerCord...........................................................................................3-3
Figure3-4Filling thehumidifier............................................................................3-4
Figure3-5Attaching thehumidifiertooxygenoutlet..............................................3-4
Figure3-6Adjustingtheflowrate...........................................................................3-5
Figure3-7Compressorpowerconnector................................................................3-6
Figure3-8Intakesolenoidcoilandterminal...........................................................3-7
Figure3-9Temperaturesensor...............................................................................3-7
Figure4-1Cabinetfixedscrews.............................................................................4-1
Figure4-2Casterreplacement................................................................................4-1
Figure4-3wasteoutlet/airinlet/oxygenoutlet........................................................4-2
Figure4-4Removesolenoidvalve.........................................................................4-1
Figure4-5Removesolenoidcoil............................................................................4-1
Figure4-6themountingbandofsievebed.............................................................4-2
Figure4-7Thesuctionandfeedtubesofcompressor.............................................4-4
Figure4-8Thepowerleadofcompressor...............................................................4-4
Figure4-9Loosereliefvalve..................................................................................4-5
Figure4-10 Thecapacitorofcompressor................................................................4-5
Figure4-11Intakeaxialfan....................................................................................4-6
Figure4-12 Exhaustaxialfan.................................................................................4-6
Figure4-13 Circuitboard.......................................................................................4-8
Figure4-14 Oxygensensorboard...........................................................................4-9
Figure4-15 Outputpressuredetect........................................................................4-10
Figure4-16 Pressureregulator...............................................................................4-10
Figure4-17 LeadsofCircuitbreakerandON/OFF switch.....................................4-11
Figure4-18 Unscrewcircuitbreaker......................................................................4-11
Figure4-19 RemoveON/OFFswitch....................................................................4-12
Figure4-20 OxygenmonitorLEDconnector.........................................................4-12
Figure4-21 Press downtabsofhourmeter............................................................4-13
Figure4-22 Removehourmeter............................................................................4-13
Figure4-23 Uscrewflowmeternuts.......................................................................4-14
Figure4-24 Buzzer................................................................................................4-14
Figure4-25 Detectoperatingpressure...................................................................4-15
Figure5-1Cabinetairinletfilter............................................................................5-1
Figure5-2Airintakefineparticlefilter..................................................................5-2
Figure5-3Bacteriafilter........................................................................................5-2
Figure8-1ToolKitofService................................................................................8-1

Q155 Service Manual
iv
FigureA-1ExplodedDrawing ofBaseAssembly...................................................A-2
FigureA-2ExplodedDrawingsofHousingAssembly............................................A-3
FigureA-3ExplodedDrawing ofSieveBed&ValveAssembly.............................A-4
FigureA-4ExplodedDrawingsofSolenoidValveAssembly..................................A-5
FigureA-5ExplodedDrawing ofSieveBedAssembly...........................................A-6
FigureA-6ExplodedDrawing ofCentralFrameAssembly....................................A-7
FigureA-7ExplodedDrawing ofMufflerAssembly...............................................A-8
FigureA-8ExplodedDrawing ofAirCompressorAssembly..................................A-9
FigureA-9ExplodedDrawing ofCentralFrameAssembly..................................A-10
FigureA-10 ExplodedDrawing ofHarness Assembly..........................................A-11
FigureA-11ExplodedDrawing ofAccessories.....................................................A-12

Q155 Service Manual
-ii-
ListofTables
Table1-1Listofspecifiedwarrantyperiodcomponents.........................................1-3
Table1-2Listofconsumable..................................................................................1-3
Table1-3SpecificationofOxygenConcentrator....................................................1-4
Table3-1LEDIndicatorvs. OxygenPurity............................................................3-5
Table3-2TheSymptomofAlarm..........................................................................3-5
Table6-1Troubleshooting......................................................................................6-2
Table7-1SpareParts..............................................................................................7-1
Table8-1ToolKit..................................................................................................8-1

Q155 Service Manual
-1-1-
1. Introduction
TheMeritsoxygenconcentratorsareasasolutiontodeliveraclean,portableand
continuousoxygensupplyforhomecareusage.MeritsintroducesproudlytheQ155
OxygenConcentrator.Theseconcentrators werebuiltwithqualityworkmanshipand
designedtobehighlyreliablesystemswhilemaintaining costeffectiveoperation.
Since Merits isISO13485andFDAQSRsystemapproved,wehavepledgedtobuild
onlyproductsdesignedforunmatchedreliabilityandendurance.Subsequently,we
areconfidentthatoursystemswilldeliverthenecessaryconsistentconcentrated
oxygenandflowrateas orderedbyyourattendingphysician. Smartmonitoringand
securitycontrolsystemsallowforconstantawareness ofpossiblefailuresandor
malfunctions.TheadvancedtechnologyutilizedbyMeritsensuresthatthepatient
willalwaysbealertedwithaudioandvisualalarmsystems.
1.1. IntendedUse
TheMeritsOxygenConcentratorisintendedtobeusedtosupplysupplemental
oxygentopatientsintheirhome.Thedevicesarenotintendedforlifesupportnor
do theyprovideanypatientmonitoringcapabilities.
Caution
FederalLawrestricts thisdevicetosalebyorontheorderofaphysician.
Caution
Donotadjustyourprescribedlevelofoxygenflowwithoutconsultingyour
physician.
1.2. HowtoUseService Manual
Thismanualprovidesinstructionforservice engineeronlytoservice theMerits
Q155 OxygenConcentrator. Thismanualincludeswholesectionsinthefollowing:
nIntroduction
nPatientInstructions
nOperation
nService
nMaintenance
nTroubleshooting
Allsectiontitles,subjectsubtitlesandillustrationarelistedintheTableofContents.
Note
Thismanualspecificallyinstructionforservice engineersanddistributors
only.Thisisnotamanualforpatientuse.

Q155 Service Manual
1-2
1.3. SafetyRules
Asyoureadthemanual, pleasepayattentiontoalloffollowing:
1.3.1. Warning
nFireHazard-Oxygenpromotesrapidburning. NoSmoking orOpenFlames.
nElectricalShockHazard-donotremovethecabinetoropenthecover.
nDisconnectthepowercordfromtheelectricaloutletbeforecleaning or
servicing.
nDonotplace thisequipmentnearhot, sparkingorburning objects.
nDonotuseoilorgreaseonornearthisdevice.
nDonotusetheconcentratorinthepresence ofpollutants ordangerousfumes.
nAnalternatesource ofoxygenshouldalwaysbeavailabletoavoidany
interruptioninsupply.
nThisunitisnotintendedforlifesustaining orlifesupportingapplications.
nTurntheunitoff whenitisnotinuse.
nIntheeventofanalarm, contactyourequipmentprovider.
nIfyouexperience anysignsofdiscomfort, contactyourphysician
immediately.
nMeritsrecommendsthateachconcentratorbeonandrunning foraminimum
of60 minutesatatime.
nKeepthecordawayfromHEATEDorHOTsurfaces.
nNEVERdroporinsertanyobjectintoanyopening.
nNEVERblocktheairopeningsoftheproductorplace itonasoftsurface,such
asabedorcouch, wheretheairopeningmaybeblocked.
nAvoidtheoperationinwetordamplocations.
nGeriatric,pediatric,oranyotherpatientsunabletocommunicatediscomfort
whileusing thisconcentratormayneedadditionalmonitoringunder
physiciansormedicalprofessionals.
nChildrenmayneedpediatricflowmetertousewiththisconcentrator,consult
yourphysicianbeforeusage.
1.3.2. Precaution
nAlwaysplug ina15 AMP,groundedcircuit.DO NOT USEANEXTENSION
CORD.
nPlace theunitwheresidesandbottomareunobstructedtoensureproper
airflow. (Besurethatthemachineisplacedawayfromdrapes orotherobjects
thatmightblocktheflowofincoming airand/oralarmindicators.)
nOnlyoperatetheconcentratorinanuprightposition.
nDonotuseoxygentubingthatexceeds50 feetinlength.Themanufacturer
recommendscrushresistanttubing.
nDonotplace liquidsontheunitoruseliquidstocleantheunit.Donotuse
petroleum-basedsolvents.Cleanunitandpowercordwithmildhousehold

Q155 Service Manual
1-3
cleanerappliedwithadampclothorsponge,thenwipedry.
nTheSalterLabs7100 350c.c.BubbleHumidifierand theB&FMedicalBubble
HumidifieraresuitableforusewiththeOxygenConcentrators. Ora
humidifiercapableof30 psioperationand15 LPMofflowis required.Useof
certainhumidifiersnotspecifiedforusewiththisoxygenconcentratormay
impairtheperformance.
nAlwayschoosetheFDAorCEapprovedaccessories,suchasMasksor
cannulas&Humidifierstoensurethereliabilityand performance.
nDifferentpersonneltopreventcross infectionshouldneverusethesamemask
orcannula.
1.4. Warranty
Merits HealthProducts Co., Ltd.warrantstheOxygenConcentratortobefree from
detectingeneralpartsforaperiodof5yearsfromthedateofpurchaseexcluding
thepartswhichwarrantyarespecifiedonTable1-1.Pleasetell yourcustomerfor
moredetails.ThiswarrantyislimitedtotheoriginalpurchaseroftheOxygen
Concentrator.Anydefectivepartorassemblywillberepairedorreplaced,atthe
solediscretionanddeterminationofMeritsHealthProducts Co.,Ltd.,iftheunithas
beenproperlyoperatedduringthewarrantyperiod.Normalmaintenance itemsand
disposablecomponents(see Table1-2)arenotcoveredbythiswarranty.Shipping
charges,ifany, shallbepaidbythepurchaser.
Note:Thereisnootherexpress warranty.Impliedwarranties,including thoseof
merchantabilityandfitness foraparticularpurpose,arelimitedtothe
durationoftheexpresslimitedwarrantyandtotheextentpermittedbylaw
andallimpliedwarrantiesareexcluded.Thiswarrantydoesnotcover
providingaloanerOxygenConcentrator, compensatingforcostsincurredfor
OxygenConcentratorrental, orlaborcostsincurredinrepairing orreplacing
defectivepart(s).
Component PartNumber WarrantyPeriod Note
Compressor 4-S01 10,000 hour
MolecularSieve 2-S22 1 year
Table1-1Listofspecifiedwarrantyperiodcomponents
Component Part
Number Note
IntakeFoam 1-P19 Cleaneveryweek
BacteriaFilter 1-P43 Replace afterevery10,000hruse
IntakeFilter 3-P41 Replace oncleancondition
Table1-2Listofconsumable

Q155 Service Manual
1-4
1.5. Specifications
ElectricalRequirements 115VAC 10 ,60Hz/230VAC 10 ,50Hz
RatedCurrentInput 3.5A(115VAC/60Hz);1.8A(230VAC/50Hz)
SoundLevel 48dB(A)Average
OperatingAltitude Donotuseataltitudeover4000meters.
OxygenConcentration90 at1~5LPM
*Statedperformance maximumachievedafter60 min.
ofruntime.
OxygenDeliveryPressure: 60.5psi.(40 4kPa.)
OptionalOxygenSensor OxygenPurity LEDIndicator
Over85 (3) GREEN Indicatorlight
70 (3)to85 (3) YELLOW Indicatorlight
Below70 (3) RED Indicatorlight
FlowRange/Maximum
RecommendedFlow 0-5 LPM /5LPM
AveragePowerConsumption 350W
PressureReliefActivation 250kPa 10
Filters Cabinet,BacteriaandCompressorInlet
Alarms (Visual/Audible) Hightemperaturew/compressor –powershutdown
High/Lowpressurealarm
Powerloss alarm
Dimensions 68cm(26.8”)High ×45cm(17.7”)Wide ×33cm(13”)Deep
CircuitBreaker&Fuse (115VAC/60Hz)Circuit
Breaker:8A (230VAC/50Hz)Circuit Breaker:4A
Weight 24Kg(53lb)
ShippingWeight 27Kg(59.5lb)
OperatingAmbientTemperature 10℃~35℃
Cabinet Impact Resistantflame-retardantplasticcabinet
RegulatoryListing CSA601/UL2601/IEC/EN-60601-1
ChangeinMax.Flowwith7kpa
BackPressure 0.3LPM
RecommendedStorageand
ShippingTemperature Dry(Upto95 non-condensing),wellventilatedarea -20 ℃~60℃
Table1-3SpecificationofOxygenConcentrator
(1).Conditionsmayvarybasedonaltitudeabovesealevel,barometricpressureandtemperature.
Specificationsubjectstochangewithoutnotice.
(2).Thisproductcomplieswiththefollowingstandards:C22.2No601.1-M90, ULStd.No2601-1and
IEC/EN60601-1.
(3).Forelectromagneticcompatibilitythestandardsarebasedasfollow:CSA601.1-2 andIEC/EN
60601-1-2.
(4).Protectionagainstelectricshockisclassifiedas TypeII.
(5).Degree of protectionagainstelectricshockisclassifiedas TypeBF.
(6).Modeofoperationbelongstocontinuousmode.
(7).Equipmentnotsuitableforuseinthepresence of aflammableanestheticmixturewithairorwith
oxygenornitrousoxide
(8).Degree ofprotectionagainstingress ofwaterisratedasIPX0.

Q155 Service Manual
-2-1-
2. Patient Instructions
2.1. Unpacking
i. Checkforanyobviousdamagetothecartonoritscontents. Ifdamageisevident,
notifythecarrier, oryourlocaldealer.
ii. Removeall loosepackingfromthecarton.
iii. Carefullyremoveconcentratorfromthecarton.(SeeFigure2-1)
iv. Inspectthecabinetexteriorthoroughlyfordamage.Ifdamageisevident,notify
thecarrier, oryourlocaldealer.
Normal
OxygenPurity
Auto-Shut-Down
Abnormal85%
!
!
Figure2-1Unpacking
Note
Unless theoxygenconcentrator is tobeusedimmediately,retaincontainer and
packing materialsforstorageuntil useoftheconcentratorisrequired.
Note
Theconcentratorshouldalwaysbekeptintheuprightposition toprevent
cabinetdamagewhilebeing transported.
2.2. Check
Q155 OxygenConcentratoristestedthoroughlytomakesurethefunctionis
normalaftermanufacture.Pleaseperformthefollowing proceduretoensureno
damageoccurredinshipping.
i. Plug inthepowercordandsettheON/OFF switchtotheONposition.Then
checkwhetherthefollowing occurs ornot:
a. Theoxygenpurityindicatorlightsilluminateaccompaniedwithonebeepand
thenoff in2minutes.
b. Listenthesoundofcompressorrunning.
c. Exhaustairflowsoutofthebottomofconcentrator.

Q155 Service Manual
2-2
ii. Turntheflowmeteradjustmentknobcounterclockwiseuntil itstops(wide
open).Checkthepositionoftheball insideflowmeter.Itmustbeonthetopof
flowmeter.
iii. Theoxygenpurityindicatorgreenlightilluminatesintenminutesafterswitch
on.
2.3. RoutineMaintenance bythepatient
Toensureconcentratornormalwork,thepatientmustperformthefollowing
simplemaintenance steps.
2.3.1. GeneralCaring
nDailyinspectionofthecabinetfiltershouldoccur.Lightlyvacuumorsweep
off. Donotuseanysharporcorrosivematerials.
nAlwaysuse,cleanand/orreplacethehumidifierinaccordancewith
manufacturer'sordealer'sinstructions.
nThepatientshouldneverservice oropenthismachine.Itistobeservicedby
qualifiedpersonnelonly.
nTheoxygenconcentrationshouldbecheckedevery90 daysforunitswithout
optionaloxygensensors.Theoxygenconcentrationshouldbecheckedevery6
monthsforunitswithoptionaloxygensensors.
2.3.2. CleaningCabinetAirIntakeFilter
i. RemovethecabinetfilterandCLEANATLEASTONCEAWEEK
depending onenvironmentalconditions. (See
ii. Figure2-2)
iii. Cleanthecabinetfilterwithavacuumcleanerorwashinwarmsoapywater
andrinsethoroughly. (See
iv. Figure2-3)
v. Drythefiltersthoroughlybeforereinstallation.

Q155 Service Manual
2-3
IntakeFilter Cabinet Filter
Figure2-2PositionofCabinetFilter

Q155 Service Manual
-2-1-
Figure2-3CleanCabinetFilter
2.3.3. Humidifier
Note
Toclean theoxygenhumidifier,followtheinstructionsprovidedbythe
manufacturer. Ifnoneareprovided,followthesesteps
i. Cleanthehumidifiereveryday.
ii. Washitinsoapywaterandrinseitwithasolutionof10 partswaterand1part
vinegar.
iii. Rinseagainwithhotwaterandrefillwithdistilledwatertothelevelshown
onthehumidifier.

Q155 Service Manual
-3-1-
3. Operation
3.1. DescriptionofOperation
Figure3-1showsthenormalairflowrouteofMeritsOxygenConcentrator.First,air
is drawnintothecabinetthroughtheintakefilterandmuffler,whichhelps quietthe
compressor'sintakesound.ThenAirenterscompressorandispressurizedinthe
compressor.Pressurizedairthenpassesthroughaheatexchanger,whichreduces
thetemperatureofthecompressedair.NextthesolenoidvalvedevelopedbyMerits
directcompressedairintoUnitBlock(solenoidvalve+sievebed×2+oxygentank
+airpipe)thatcontainmolecularsieve.Thepropertyofmolecularsievematerialis
thatitis abletoadsorbnitrogenandallowoxygenpass whenairpasses throughthis
material, thusproducinghighpurityoxygen.
TherearetwosievebedsinUnitBlock.Whileoneallowshighpurityoxygento
pass,theotherispurgedofthenitrogenitadsorbedwhileitmadeoxygen.Each
sievebeddeliversitsoxygentotheoxygentankofUnitBlock.Oxygenexitsthis
producttankthroughapressure-controlling regulator,flowmeter,andfinalbacteria
filter.ThePioneerunitdeliversup to93 3%pureoxygenatflowratesfrom1-5
LPM.
MUFFLER
ELECTRONICAL
CONTROL
CIRCUIT (NEW)
VALVE
SOLENOID
BLOCK
UNIT
ALLINONE
F
M/L
M
INTAKEFILTER
INTAKEMUFFLER
AIR-COMPRESSOR
HEATEXCHANGER
AIRIN
SIEVEBEDx2
OXYGENTANK
F
FLOWMETER
BACTERIAFILTER
OXYGENOUT
RREGULATOR
Figure3-1Process Schematic

Q155 Service Manual
3-2
3.2. ExteriorParts
Exteriorpartsdescribedbelow:
nExteriorCabinet
TheExteriorCabinetwhichmaterialisABSisstrengthdurability. Itismade
up offrontandrearcabinet.
nFlowmeter/Knob
Displaysandcontrolstheoxygenflowrate.
nON/OFFPowerSwitch
Startsandstops theoperationofconcentrator.
nCircuitBreaker
Cutoff concentratorafteranelectricaloverload.
nOxygenOutlet
Theconnectionportforhumidifier.
nOperatingInstructionLabel
Theoperatinginstructionforeasyreference bythepatient.
nWarningLabel
Indicatesthatyoumustreference importantinformation.
nSerialNumberLabel
Showstheserialnumberoftheconcentrator.
nCabinetAirIntakeFilter
CleanstheAirenters theconcentrator.
nElectricalSpecificationLabel
Indicatespowerrequirementsandsafetyapprovals.
nAirExhaustVents
ExhaustAirexitstheconcentrator.
nHand Grips
Convenience tomovetheconcentrator.
nPowerCordSocket
Plug inpowercord.
nCasters
Onthebottom, provideconvenience tomovetheconcentrator.

Q155 Service Manual
3-3
CabinetFilterHolder
CabinetFilter
PowerSwitch
PowerCord
CircuitBreaker
OxygenPurityIndicatorLights
Normal Abnormal85%
OxygenPurity
Auto-Shut-Down
Flowmeter
!
!
OxygenOutlet
FlowAdjustmentKnob
Figure3-2Cabinet
3.3. Handling
3.3.1. Selectalocation
Selectalocationwheresidesandbottomareunobstructedtoensureproper
airflow.Besurethatthemachineisplacedawayfromdrapesorotherobjectsthat
mightblocktheflowofincoming airand/oralarmindicators. Thearea shouldbe
freeofpollutants ordangerousfumes.Theunitshouldbeplacedonastablelevel
surface.Thelocationshouldhaveaccess toapoweroutletwithoutuseofan
extensioncordorwherethecordis placedacross atrafficarea.Donotplace near
asource orheatoropenflameorhot, sparkingobjects.
3.3.2. Pluginpowercord
Plug thepowercordintoagrounded, 15 AMPpoweroutlet. (See Figure3-3)
Outlet
Power
Figure3-3PowerCord
Caster
Hand Grip
Electrical
SpecificationLabel
Serial
NumberLabel
AirExhaustVent
OperatingInstruction
Label&WarningLabel

Q155 Service Manual
3-4
3.3.3. Connecthumidifier(ifprescribedbyyourphysician)
Fill thehumidifierwithdistilledwateraccordingtothemanufacturer’s
instructions(See Figure3-4).Donotoverfill.Replace thecabandsecurely
tighten.Place thehumidifierinthehumidifiercompartmentandattachtothe
oxygenoutletoftheconcentrator(See Figure3-5).
HumidifierBottle
Figure3-4Filling thehumidifier
HumidifierOutlet
Connector
OxygenOutlet
OxygenPurity
Auto-Shut-Down
Normal Abnormal85%
Figure3-5Attaching thehumidifiertooxygenoutlet
Note
TheSalterLabs7100 350c.c. BubbleHumidifierand theB&FMedicalBubble
HumidifieraresuitableforusewiththeOxygenConcentrators.Orahumidifier
capableof30 Psioperation and 15 LPMofflowisrequired.Useofcertain
humidifiers notspecifiedforusewiththisoxygenconcentratormayimpairthe
performance.

Q155 Service Manual
3-5
3.3.4. Startup
TheMeritsPioneerOxygenConcentratoroperatesonstandardhousehold
electricity.Press theON/OFFpowerswitchtothe ON position.Thepower
indicatorlightwillilluminateaccompaniedwithonebeepandthenoffin2
minutes.
3.3.5. Adjustflowrate
Turntheknobontheflowmetertoadjusttheflowratetothatprescribedbyyour
physician.Theballinsidetheflowmetermustbecenteredontheflowlineforthe
desiredflowrate.
FlowKnob
Ball
2
3
1
O2
2
1
5
4
3
5
4
Auto-Shut-Down
OxygenPurity
Abnormal85%
Normal
Figure3-6Adjustingtheflowrate
3.3.6. Oxygenpurityindicator
This featuremonitorsthepurityofoxygengeneratedbytheoxygenconcentrator.
Thecolorofindicatorlightrepresentasfollowing:
OxygenPurity LEDIndicator
Over85 (3) GREEN Indicatorlight
70 (3)to85 (3) YELLOW Indicatorlight
Below70 (3) RED Indicatorlight
Table3-1LEDIndicatorvs. OxygenPurity
3.3.7. Startoxygentherapy
Youcanusetheoutputoftheoxygenconcentratorimmediately.However,itmay
takeupto60minutestoreachmaximumoxygenconcentration.
3.4. AlarmSystem
ThePioneerOxygenConcentratorisequippedwithanalarmsystem.Alarm
systemwillstartup iffoursituationshappen:
Symptom Alarm
PowerLoss ALARM Oneshortbeep, longpause
OverheatingALARM Twoshortbeep, longpause-powershutdown
HighPressureALARM Three shortbeep, longpause(>2.2 0.2kgf/cm2)
LowPressureALARM Fourshortbeep, long pause(<0.7 0.2kgf/cm2)
Table3-2TheSymptomofAlarm

Q155 Service Manual
3-6
3.4.1. PowerFailureAlarmTest
Totestthepowerfailurealarm:
Unplug theunitfromwalloutlet,andsettheON/OFFswitchtotheON position.
Thisshouldimmediatelyactivatetheaudiblealarm.(Oneshortbeep,longpause)
3.4.2. LowPressureAlarmTest
Totestthelow-pressurealarmsystem:
i. SettheON/OFFswitchtotheOFF position, andunplug thepowercord.
ii. Removethecabinet,thendisconnectthecompressorpowerconnector
fromthecircuitboard. (See Figure3-7)
iii. Plug intheunit, andsettheON/OFF switchtotheON position.
iv. Whenthepressureis0.7 0.2kgf/cm2below,theaudiblealarmshouldbe
fourshortbeep,longpauseandrepeatthiscycle.
v. SettheON/OFFswitchtotheOFF position, andunplug thepowercord.
vi. Reconnectthecompressorpowerconnectortothecircuitboard.
vii. Reinstallthecabinet.
Figure3-7Compressorpowerconnector
3.4.3. HighPressureAlarmTest
TotesttheHigh-pressurealarmsystem:
i. SettheON/OFFswitchtotheOFF position, andunplug thepowercord.
ii. Removethecabinetanddisconnecttheintakesolenoidcoil terminalsof
solenoidvalve. (See Figure3-8)
iii. Plug intheunit, andsettheON/OFF switchtotheON position.
iv. Whenthepressureisabove2.2 0.2kgf/cm2,theaudiblealarmshouldbe
three shortbeep, longpauseandrepeatthiscycle.
v. SettheON/OFFswitchtotheOFF position, andunplug thepowercord.
vi. Reconnecttheintakesolenoidcoilterminal.
vii. Reinstallthecabinet.
Compressor
powerconnector