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TABLE OF CONTENTS PAGE SAFETYCONSIDERATIONS ....................... 1- --2 INTRODUCTION ................................... 2 RECEIVINGANDINSTALLATION ................. 2- --13 CheckEquipment .................................. 2 IdentifyUnit .................................... 2 InspectShipment................................. 2 ProvideUnitSupport ............................... 2 RoofCurb ...................................... 2 SlabMount ..................................... 2 FieldFabricateDuctwork ............................ 6 ProvideClearances ................................. 6 RigandPlaceUnit ................................. 6 ConnectCondensateDrain ........................... 7 InstallFlueHood................................... 7 InstallGasPiping .................................. 7 InstallDuctConnections ............................. 9 ConfiguringUnitsforDownflow(Vertical) Discharge ...................................... 9 InstallElectricalConnections ........................ 12 High- --VoltageConnections ........................ 12 SpecialProceduresfor208- --VOperation.............. 12 ControlVoltageConnections....................... 13 BalancePointSettingThermidistatorHybridHeat Thermostat .................................... 13 TransformerProtection ........................... 13 PRE- --START--UP ................................ 13--14 START--UP..................................... 14--17 CheckforRefrigerantLeaks ......................... 14 UnitSequenceofOperation ......................... 14 Start- --UpHeatingandMakeAdjustments ............... 14 CheckingHeatingControl......................... 14 CheckGasInput ................................ 15 AdjustGasInput ................................ 15 CheckBurnerFlame ............................. 16 Start- --UpCoolingandMakeAdjustments............... 16 CheckingCoolingControlOperation ................ 16 CheckingandAdjustingRefrigerant ................. 17 IndoorAirflowandAirflowAdjustments ............. 17 MAINTENANCE................................ 32- --38 AirFilter ........................................ 32 IndoorBlowerandMotor ........................... 32 FlueGasPassageways.............................. 33 LimitSwitch ..................................... 33 BurnerIgnition ................................... 33 MainBurners .................................... 33 OutdoorCoil,IndoorCoil,&CondensateDrainPan ...... 33 OutdoorFan ..................................... 34 ElectricalControlsandWiring ....................... 34 RefrigerantCircuit................................. 34 A09034 Fig. 1 - --Unit 48EZ- --A GasInput........................................ 35 IndoorAirflow ................................... 35 CheckDefrostThermostat........................... 35 PuronR Items .................................... 35 TROUBLESHOOTING .............................. 38 START- --UPCHECKLIST ............................ 38 SAFETY CONSIDERATIONS Installationandservicingofthisequipmentcanbehazardousdue to mechanical and electrical components. Only trained and qualifiedpersonnelshouldinstall,repair,orservicethisequipment. Untrainedpersonnelcanperformbasicmaintenancefunctionssuch as cleaning and replacing air filters.All otheroperations mustbe performed by trained service personnel. When working on this equipment, observe precautions in the literature, on tags, and on labels attached to or shipped with the unit and other safety precautionsthatmayapply. Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local buildingcodes,thecurrenteditionsoftheNationalFuelGasCode (NFGC)NFPA54/ANSIZ223.1,andtheNationalElectricalCode (NEC)NFPA70. InCanadarefertothecurrenteditionsoftheNationalStandardsof Canada CAN/CSA- --B149.1 and .2 Natural Gas and Propane Installationcodes,andCanadianElectricalCodeCSAC22.1. Recognizesafetyinformation.Thisisthesafety- --alertsymbol . Whenyouseethissymbolontheunitandininstructionsormanuals, bealertto thepotentialforpersonalinjury.Understandthese signal words: DANGER, WARNING, and CAUTION. These wordsareusedwiththesafety- --alertsymbol.DANGERidentifies themostserioushazardswhichwill resultinseverepersonalinjury ordeath.WARNINGsignifieshazardswhich could result in personalinjuryordeath. CAUTIONisusedtoidentifyunsafepractic 1 48EZA48EZA es which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. ! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system and install lockout tag. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable. WARNING! FIRE, EXPLOSION,...