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Carrier 48EZ(N)-A installation instructions 48EZ-A42-60Unit Dimensions, 48EZ --A, A09451

Models: 48EZ(N)-A

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48EZ -- A

A09451

Fig. 3 - 48EZ-A42-60 Unit Dimensions

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Carrier 48EZ(N)-A installation instructions 48EZ-A42-60Unit Dimensions, 48EZ --A, A09451

Contents

TABLE OF CONTENTS SAFETY CONSIDERATIONSFig. 1 - Unit 48EZ-A Installation InstructionsRECEIVING AND INSTALLATION Installation on older “G” series roof curbsINTRODUCTION Step 1 - Check Equipment48EZ --A Fig. 2 - 48EZ-A24-36Unit DimensionsA09450 48EZ --A Fig. 3 - 48EZ-A42-60Unit DimensionsA09451 Fig. 4 - Roof Curb Dimensions B C G H F A E DSMALL CURB ROOF CURB DETAILStep 3 - Field Fabricate Ductwork Step 4 - Provide ClearancesStep 5 - Rig and Place Unit InspectionStep 7 - Install Flue Hood Step 8 - Install Gas PipingStep 6 - Connect Condensate Drain Rigging/Lifting of Unit See Fig.Fig. 7 - Sediment Trap FIRE OR EXPLOSION HAZARD48EZ --A Step 9 - Install Duct Connections Configuring Units for Downflow Vertical DischargeFig. 8 - Supply and Return Duct Opening ELECTRICAL SHOCK HAZARDTable 1 - Physical Data - Unit 48EZ-A 48EZ --ATable 1 - Physical Data - Unit 48EZ-ACont’d Table 2 - Maximum Gas Flow CapacityTable 3 - Heating Inputs 48EZ --AStep 10 - Install Electrical Connections Special Procedures for 208-VOperationHigh-VoltageConnections UNIT COMPONENT DAMAGE HAZARDBalance Point Setting-Thermidistator Hybrid PRE-START-UPControl Voltage Connections ThermostatStep 3 - Start-upHeating and Make Adjust- ments START-UPStep 1 - Check for Refrigerant Leaks Step 2 - Unit Sequence of OperationAdjust Gas Input Fig. 11 - Burner AssemblyCheck Gas Input Table 4 - Altitude Derate Multiplier for U.S.AStep 4 - Start-upCooling and Make Adjust- ments Airflow and Temperature RiseLimit Switches Rollout SwitchChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsGas Heating Fan Speed Set-up UNIT OPERATION HAZARDContinuous Fan Operation Table 6 - Color Coding for Indoor Fan Motor LeadsFig. 13 - Interface Fan Board IFB 48EZ --A48EZ--A 48EZ--A Heating Rise48EZ--A 123448EZ--A 129548EZ--A 140248EZ--A 140248EZ--A UNIT48EZ--A UNIT48EZ A A10207C48EZ A A10207L48EZ A A10208C48EZ A A10208L48EZ --A Fig. 16 - Cooling Charging Table-SubcoolingA08019 MAINTENANCE Cleaning the Blower Motor and WheelAir Filter Indoor Blower and MotorLimit Switch Induced Draft combustion air Blower AssemblyFig. 17 - Blower Housing and Flue Collector Box Fig. 18 - Unit Access PanelsElectrical Controls and Wiring Outdoor FanRefrigerant Circuit Fig. 19 - Removal of Motor and Blower WheelPage High-PressureSwitch Fig. 24 - Refrigerant CircuitCopeland Scroll Compressor Puron Refrigerant EXPLOSION HAZARDUNIT OPERATION AND SAFETY HAZARD Refrigerant SystemCompressor Oil 48EZ --ATROUBLESHOOTING START-UPCHECKLISTSynthetic Roof Precautionary Procedure Liquid Line Filter DrierSYMPTOM 48EZ --ATable 14 - Troubleshooting Guide-LEDError Codes Table 13 - Troubleshooting Guide-Heating48EZ --A TEMPERATURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO PRESSURES