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Carrier 48EZ-A Return Duct Panels, Return & Supply Duct Panels from, 48EZ --A

Models: 48EZ-A

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Image 12

48EZ -- A

Horizontal Duct Covers

Basepan Downflow (Vertical) Supply Knockout

A09061

Basepan Downflow (Vertical) Return Knockout

Return Duct Panels

Supply Duct Panels

A09060

Fig. 8 - Supply and Return Duct Opening

Return & Supply Duct Panels from

Underside of Base (Alternate Method)

A09420

Fig. 9 - Vertical (Downflow) Discharge Duct Knockouts

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Image 12

Carrier 48EZ-A Return Duct Panels, Return & Supply Duct Panels from, Underside of Base Alternate Method, 48EZ --A

Contents

TABLE OF CONTENTS SAFETY CONSIDERATIONSFig. 1 - Unit 48EZ-A Installation InstructionsRECEIVING AND INSTALLATION Installation on older “G” series roof curbsINTRODUCTION Step 1 — Check EquipmentFig. 2 - 48EZ-A24-36Unit Dimensions 48EZ --AA09450 Fig. 3 - 48EZ-A42-60Unit Dimensions 48EZ --AA09451 Fig. 4 - Roof Curb Dimensions SMALL CURBROOF CURB DETAIL LARGE CURBACCESS PANELS MUST BE IN PLACE WHEN RIGGING Step 5 — Rig and Place UnitStep 4 — Provide Clearances Fig. 5 - 48EZ-ASuggested RiggingStep 7 — Install Flue Hood Step 8 — Install Gas PipingStep 6 — Connect Condensate Drain InspectionTEE NIPPLE CAP FIRE OR EXPLOSION HAZARDFig. 7 - Sediment Trap 48EZ --ATable 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 9 — Install Duct Connections Configuring Units for Downflow Vertical DischargeAlternate Method UNIT COMPONENT DAMAGE HAZARDReturn Duct Panels Return & Supply Duct Panels fromUnderside of Base Alternate Method Fig. 8 - Supply and Return Duct OpeningStep 10 — Install Electrical Connections Special Procedures for 208-VOperationHigh-VoltageConnections Control Voltage ConnectionsBalance Point Setting-Thermidistator Hybrid PRE-START-UP48EZ ThermostatStep 3 - Start-upHeating and Make Adjust- ments Fig. 11 - Burner AssemblySTART-UP Step 1 — Check for Refrigerant LeaksAdjust Gas Input Check Heating ControlCheck Gas Input Fig. 12 - Monoport BurnerAirflow and Temperature Rise Limit SwitchesRollout Switch Check Burner FlameStep 4 - Start-upCooling and Make Adjust- ments Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments Checking Cooling Control OperationGas Heating Fan Speed Set-up Continuous Fan OperationTable 6 – Color Coding for Indoor Fan Motor Leads Fig. 14 - Interface Fan Board IFBTable 7 – Filter Pressure Drop Table IN. W.C Table 8 – 48EZ-AWet Coil Pressure Drop IN. W.C48EZ --A FILTER SIZE48EZ --A Heating48EZ --A 123448EZ --A 140248EZ --A 1445Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48EZ-A 48EZ AFig. 16 - 208/230-3-60Wiring Diagram, Unit 48EZ-A 48EZ --AA09209 Fig. 17 - Cooling Charging Table-Subcooling 48EZ --AA08019 MAINTENANCE Cleaning the Blower Motor and WheelAir Filter Indoor Blower and MotorLimit Switch Induced Draft combustion air Blower AssemblyFig. 18 - Blower Housing and Flue Collector Box Fig. 19 - Unit Access PanelsElectrical Controls and Wiring Outdoor FanRefrigerant Circuit Fig. 20 - Removal of Motor and Blower WheelPage High-PressureSwitch Fig. 25 - Refrigerant CircuitCopeland Scroll Compressor Puron Refrigerant EXPLOSION HAZARDUNIT OPERATION AND SAFETY HAZARD LEGENDRefrigerant System Compressor OilTROUBLESHOOTING START-UPCHECKLISTSynthetic Roof Precautionary Procedure Liquid Line Filter DrierSYMPTOM 48EZ --ATable 12 – Troubleshooting Guide–Heating Table 13 – Troubleshooting Guide–LEDError Codes48EZ --A TEMPERATURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO PRESSURES48EZ --A Catalog No: 48EZ---06SIEdition Date: 08/09 Replaces: 48EZ---05SI