空调测试

HoustonLabUnitSetupProcedureLocateID&ODUnits(Thisshouldbedonebeforecurrentunittestingisterminated)ObtainID&ODunitsasrequiredintheTRformDON’TFORGETtoremovethetagonthemagnetboardforthecorrespondingunitFollowingWorksCanbePerformedWhenUnitArrivesJobsiteEarly:FilloutunitdescriptionformStartunitrefrigerantrecoveryifnecessary**Note:UseModelLV20LargeCapacityRecoveryMachinetoperformthetask.*Note:Topreventsystemfromaircontamination,purgetheairfromthehosesbeforerefrigerantchargingorrecoveringeverytime.ChangingorAddingparts(Ex:changecompressor,fanmotor,fanblade,condensercoiloraddingaccumulatorasengineersrequested)AttachTCtosuctionanddischargelineandlabelbothattheoutlet.**Note:Toensurereliableandaccuratetemperaturereading,thejointpointofthermocoupleandcoppertubeneedtobewellinsulated.UnitDisconnection:Step1CloseliquidlineservicevalveSystempumpdownClosesuctionlineservicevalveUnitDisconnection:Step2ShutoffmainpowersupplyConnectmanifoldgaugetothecondenserTurnonrecoverymachineUnitDisconnection:Step3Followingworkscanbeperformedwhentherecoverymachineisoperating:RemoveroundStyrofoam&thermometerfromthecondenserDisconnectwiringDisconnectallthermocouplesRemovecondenserairsamplersUnitDisconnection:Step4TurnoffrecoverymachineRemoveSchradervalvecorefromliquid&suctionlineofcondenserDisconnectcoppertubeofODunitDisconnectingUnitDisconnection:Step5RemoveSchradervalvecorefromIDunitDisconnectcoppertubefromIDunitPlaceSchradervalvecoresbackinpositionDisconnectingUnitDisconnection:Step6RemoveAluminumtapefromIDunitairsupplyductRemoveID&ODunitfromtheroomODUnitMovingOutIDUnitDisconnectingIDUnitMovingOutInstallIDUnitMoveinIDunitandplaceitincorrectposition*InstallsupplyairductbyusingproperStyrofoamormetalmadeboxSealthesupplyductbyusingAluminumtapetopreventairleakage*Note:Don’tforgettoremovethepistonatevaporatorinletwhenaTXVisused.InstallODUnitPlaceODunitinproperposition(aminimumof12’’clearancetoanywallRemoveSchradervalvecorefromliquidlineandsuctionlineservicevalvesBrazingCoppertubebrazingforbothOD&IDunitsReplaceSchradervalvecoreSystemLeakageCheckThere’retwooptionsforunitleakagecheck1.Usenitrogentopressurizeunittoaminimumof100psig,shutoffthesupplyvalveandseeifthepressureholdsafter10minutes(youcanreleasethenitrogentotheatmosphereafterleakcheckiscompleted)2.Startthevacuumpumpforatleast20minutes.Turnoffthevacuumpumpandseeiftheunitpressureholdsat-14psigorbelowviayourcomputer≤14.00≤14.00≤14.00GOOD!!DuringSystemVacuumConnectcondensatedrainforIDunitConnectairflowprobesbyfacingagainstthesupplyairConnectIDunitairsampler*Note:Ifadditionaltimeleftwhenthevacuumpumpisstilloperating,testunitdatacanbeenteredintocomputer.DuringSystemVacuumUnitWiring*ConnectT/CtocorrectspotasspecifiedintheTRform*Placeairsampleraroundthecondenser*Note:Toavoidelectricshock,ensurethemainpowersupplyisin“OFF”positionbeforewiring.*Note:WhenwiringunitsotherthanGoodman’s,DONOTtrytomemorizethecoloronthewire,followthewiringdiagraminstead.*Note:Toensurereliableandaccuratetemperaturereading,thejointpointofthermocoupleandcoppertubeneedtobewellinsulated.StopVacuumPumpTurnoffthevacuumpump(needtowaitforatleast10minutestoseeifthepressureholds)Aleakagecheckandrepairmustbeperformedifthesystempressuredoesn’tholdat-14psigorbelowasshowedonthecomputer.IfaMicronGaugeisused,500micronsorlowershouldbereached,thetruesystemreadingcanberecordedinoneminutesaftervacuumpumpturnsof.-13.21-13.29-13.31Leaking!!!AddRefrigerantAddrefrigeranttotheunit(aweightscalemustbeusedwhenchargedeterminationisrequiredbyengineer)PlaceroundStyrofoamaroundthetopofcondenserPlacethermometeraroundthecondenserStartroomtestUnitCharging*RefillreservoirwaterChangewetbulbdevicecotton*Note:Duetoliquidsluggingwillusuallycauseanimmediatedamagetothecompressor,chargerefrigerantinvaporformthroughsuctionlineispreferredwhencompressorisoperating.Ifchargingtherefrigerantintothelowsideofthesystembyliquid,rememberthattheliquidmustbevaporizedbeforeitentersthesuctionline.EndingSetupWorkareacleanup(makesureallpersonaltoolsarereturnedtooriginalposition)ReturnPreviousTestUnitBacktoInventoryPlaceOD&IDunitsintoboxesGrabthetagfromthemagnetboardReturntheunittotheiroriginallocationasitshowsonthetag**Note:Inventorysystemwillworksystematicallyonlywheneachindividualtakesfullresponsibilitywheneitherpickuporreturnunits.