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KSAHI0401R22 High - - - PressureSwitchKit KAAHI0501PUR Installation Instructions NOTE : Read the entire instruction manual before starting the INTRODUCTION installation . SAFETYCONSIDERATIONS ! Installing and servicing air conditioning equipment can be WARNING hazardous due to system pressures and electrical components . PERSONALINJURYAND / ORPROPERTY Only trained personnel should install or service air conditioning DAMAGEHAZARD equipment . Failure to follow this warning could result in personal Untrained personnel can perform basic maintenance functions injury , deathand / orpropertydamage . such ascleaning coils , orcleaning and replacing filters . Allother operations should be performed by trained service personnel . High - - Pressure Switch Kit KSAHI0401R22 must be When working on air conditioning equipment , observe installed when heat pump is used with a gas furnace precautionsintheliterature , ontags , andon labelsattached tothe ( dualfuel ) application . unit . ! ! . Recognizesafetyinformation.Thisisthesafety - - alertsymbol TheseinstructionscoverinstallationofHigh - - PressureSwitchKit When you see this symbol on the unit and in instructions or KSAHI0401R22onsplitsystemairconditionersand heatpumps manuals , bealerttothepotentialforpersonalinjury . containing R - - 22 refrigerant and KAAHI0501PUR on air conditionerscontainingPuronr ( R - - 410A ) refrigerant . Understand these signal words ; DANGER , WARNING , and CAUTION . These words are used with the safety - - alert symbol . contents : Kit DANGERidentifiesthemostserioushazardswhichwillresultin S High - - PressureSwitch - - 1 severe personal injury or death . WARNING signifies hazards S AdapterTee - - 1 whichcouldresultinpersonalinjuryordeath.CAUTIONisused to identify unsafe practices which may result in minor personal S PressureSwitchAdapterTube ( AC ) - - 1 injury or product and property damage . NOTE is used to S PressureSwitchAdapter ( HP ) - - 1 highlight suggestions which will result in enhanced installation , reliability , oroperation . S InstallationInstructions - - 1 Followallsafetycodes.Wearsafetyglassesandworkgloves . S DD24FA051FlareGaskets - - 2 ! WARNING ELECTRICALSHOCKHAZARD Failure to follow this warning could result in personal injuryordeath . Before beginning any installation or modification , be surethemain electricaldisconnectswitch isin theOFF position . TAG THE DISCONNECT SWITCH WITH ASUITABLEWARNINGLABEL . Use only the kit components described in this installation procedure .
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INSTALLATION STEP2 — HIGH - - PRESSURESWITCHINSTALLATION ! ( FORHEATPUMPS ) CAUTION RefertoFig . 2andproceedasfollowstoinstallthehigh - - pressure EQUIPMENTDAMAGEAND / OROPERATION switch . HAZARD NOTE : When installing the pressure switch adapter to a Failure to follow this caution may result in equipment previously installed unit , theunit mustbe pumped down and the damageorimproperoperation . field - - installed liquid line disconnected . Refer to Pump - - down Procedure in the Split System Residential Air Conditioning and Whenmakingflareconnections , useoneoftheflaregaskets provided in the kit to ensure a leak - - tight refrigerant HeatPumpServiceManual . connection . Use a backup wrench to avoid breaking 1 . Place the warning label on the service panel above the connectionorsplittingflare . servicevalves . 2 . Remove knockout in service panel next to liquid - - service NOTE : Theliquid - - andvapor - - servicevalvesarelocatedoutside valve . of the unit at the rear . The smaller valve is the liquid - - service 3 . Route flare fitting end ofthe pressureswitch adaptertube valve ; thelargervalveisthevapor - - servicevalve . throughknockouthole . STEP1 — HIGH - - PRESSURESWITCHINSTALLATION 4 . Securely connect pressure switch flare nut to male flare ( FORAIRCONDITIONERS ) fitting on the pressure switch adapter tube inside unit . RefertoFig . 1andproceedasfollowstoinstallthehigh - - pressure Usingbackupwrench , torqueto140in.lb . switch . 5 . Remove sweat adapter from field liquid line fitting on NOTE : Make sure the liquid - - service valve is in the fully back service fitting on liquid - - service valve and securely seated ( counterclockwise ) position before installation ( Back connect3 / 8 - - in.tubeportionofpressureswitchadaptor . seatingservicevalveshavenovalvecoreintheserviceport ) . 6 . Brazeinterconnecting liquid lineto belled end ofpressure switchadaptor . NOTE : When installing both high - - and low - - pressure switches on liquid - - service valve , connect second tee to service fitting of firsttee . ! CAUTION 1 . Removeknockoutinservicepanelnexttoservicevalves . 2 . Securely connect pressure switch adapter tubeflare nutto EQUIPMENTDAMAGEHAZARD sideofadapterteewithoutvalvecore . Failure to follow this caution may result in equipment 3 . Route the adapter tube completely through knockout so damageorimproperoperation . thatteecanbeattachedtoliquid - - servicevalvelater . Topreventmeltingofthe1 / 4 - - in.ODtubejoint , placeawet 4 . Securely connect pressure switch flare nut to male flare clothatthejointarea . fitting on adapter tube inside the unit . Using backup wrench , torqueto140in.lb . 5 . Remove seal cap from service fitting on liquid - - service 7 . Check all refrigerant connectors for leaks and repair if valve and securely connectto remaining male flarefitting necessary . onadaptertee . 8 . Evacuateindoorcoilandrefrigerantlines . 6 . Securely connectflarenut on adapter teeto servicefitting 9 . Openservicevalvesandletchargebackintosystem . onliquid - - servicevalve . 10 . MakepressureswitchelectricalconnectionperStep3 . 7 . On back seating valves , removeliquid - - service valvestem capandopenvalve3 / 4turn . 8 . Replace liquid - - service valve stem cap fingertight and furthertightencap1 / 12turn . 9 . Check all refrigerant connections for leaks and repair if Pressure Switch necessary . Pressure Switch Adapter SERVICE FITTING CAP VALVE CORE END Liquid Service Valve FLARE CRNUTEH ON PRESSUIT SW ADAPTER TEE ADAPTER TUBE DO NOT USESKET FLARE GA ( DD24FA051 ) AT FLARE NUT A07574 THIS LOCATION Fig . 2 - - High - - PressureSwitchAdapterConnections REFRIGERANT SERVICE VALVE SERVICE FITTING A05081 Fig . 1 - - High - - PressureSwitchRefrigerantConnectionsfor AirConditioners 2
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STEP3 — ELECTRICALCONNECTION TO 24V NEC CLASS 2 CONTROL CIRCUIT . 40VA MIN . TRANSFORMER OUTPUT . See Fig . 3 for Air Conditioner and Fig . 4 and Fig . 5 for Heat Pump . CONTACTOR 1 . Locate unit contactor coil terminals or , if equipped , compressortimedelayterminalT1 . C 2 . On units without compressor time delay , make electrical connectionsasfollows : a . One pressure switch in unit : Disconnect Y lead from contactor coil terminal . Connect 1 pressure switch lead to HPS LPS Y lead . Connect other pressure switch lead to contactor coilterminal . b . Bothhigh - - andlow - - pressureswitchesin unit:Disconnect T1 T2 T3 Y lead from contactor coil terminal . Connect 1 high TIME DELAY * ( IF EQUIPPED ) pressure switch lead to Y lead , then connect other high - - pressure lead to 1 low - - pressure lead . Connect * WHEN TIME DELAY IS NOT USED , CONNECT remaininglow - - pressureleadtocontactorcoilterminal . PRESSURE SWITCHES TO CONTACTOR COIL . c . With a factory installed low - - pressure switch : Disconnect the low - - pressure switch lead from Y connection on A07630 control board . Connect 1 high - - pressure switch lead to Y , Fig . 3 - - AirConditionerElectricalConnections then connectotherhigh - - pressure lead to thedisconnected low - - pressurelead . 3 . On units with compressor time delay , make electrical CIRCUIT BOARD CONTACTOR connectionsasfollows : C C a . Onepressureswitchinunit:DisconnectwireleadingtoT1 on time delay board . Connect 1 pressure switch lead to T2 * disconnected lead . Connect other pressure switch lead to T1ontimedelayboard . T1 b . Bothhigh - - andlow - - pressureswitchesin unit:Disconnect HPS LPS Y wire leading to T1 on time delay board . Connect 1 high - - pressure lead to disconnected lead , then connect other high - - pressure lead to 1 low - - pressure lead . Connect remaininglow - - pressureleadtoT1ontimedelayboard . c . With a factory installed low - - pressure switch : Disconnect the low - - pressure switch lead from T1 on time delay * T2 NOT USED ON CIRCUIT BOARDS board . Connect 1 high - - pressure switch lead to T1 , then WITHOUT TIME DELAY . WHEN T2 IS NOT connect other high - - pressure lead to the disconnected AVAILABLE , CONNECT PRESSURE SWITCHES low - - pressurelead . BETWEEN " Y " AND CONTACTOR COIL . 4 . Restorepowerandcheckunitoperation . A07629 Fig . 4 - - HeatPumpElectricalConnections Low - pressure switch lead connected to Y on control board . Low - pressure switch lead connected to contactor A07575 Fig . 5 - - HeatPumpElectricalConnections 3
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PrintedinU.S.A . EditionDate : 07 / 07 Copyright2007CAC / BDPS 7310W.MorrisSt.S Indianapolis , IN 46231 Catalog No:IIK - KAAHI - 03 Replaces:AG - - AAHI - - 02 Manufacturerreservestherighttochange , atanytime , specificationsanddesignswithoutnoticeandwithoutobligations . 4