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Carrier installation instructions 48EZ-A24-36Unit Dimensions, 48EZ --A, A09450

Models: 48EZ-A

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48EZ -- A

A09450

Fig. 2 - 48EZ-A24-36 Unit Dimensions

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Carrier installation instructions 48EZ-A24-36Unit Dimensions, 48EZ --A, A09450

Contents

Installation Instructions TABLE OF CONTENTSSAFETY CONSIDERATIONS Fig. 1 - Unit 48EZ-AStep 1 — Check Equipment RECEIVING AND INSTALLATIONInstallation on older “G” series roof curbs INTRODUCTIONFig. 2 - 48EZ-A24-36Unit Dimensions 48EZ --AA09450 Fig. 3 - 48EZ-A42-60Unit Dimensions 48EZ --AA09451 LARGE CURB Fig. 4 - Roof Curb DimensionsSMALL CURB ROOF CURB DETAILFig. 5 - 48EZ-ASuggested Rigging ACCESS PANELS MUST BE IN PLACE WHEN RIGGINGStep 5 — Rig and Place Unit Step 4 — Provide ClearancesInspection Step 7 — Install Flue HoodStep 8 — Install Gas Piping Step 6 — Connect Condensate Drain48EZ --A TEE NIPPLE CAPFIRE OR EXPLOSION HAZARD Fig. 7 - Sediment Trap48EZ --A Table 1 – Physical Data - Unit 48EZ-A48EZ --A Table 1 - Physical Data - Unit 48EZ-ACont’dTable 2 – Maximum Gas Flow Capacity Table 3 – Heating InputsUNIT COMPONENT DAMAGE HAZARD Step 9 — Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge Alternate MethodFig. 8 - Supply and Return Duct Opening Return Duct PanelsReturn & Supply Duct Panels from Underside of Base Alternate MethodControl Voltage Connections Step 10 — Install Electrical ConnectionsSpecial Procedures for 208-VOperation High-VoltageConnectionsThermostat Balance Point Setting-Thermidistator HybridPRE-START-UP 48EZStep 1 — Check for Refrigerant Leaks Step 3 - Start-upHeating and Make Adjust- mentsFig. 11 - Burner Assembly START-UPFig. 12 - Monoport Burner Adjust Gas InputCheck Heating Control Check Gas InputCheck Burner Flame Airflow and Temperature RiseLimit Switches Rollout SwitchChecking Cooling Control Operation Step 4 - Start-upCooling and Make Adjust- mentsChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsFig. 14 - Interface Fan Board IFB Gas Heating Fan Speed Set-upContinuous Fan Operation Table 6 – Color Coding for Indoor Fan Motor LeadsFILTER SIZE Table 7 – Filter Pressure Drop Table IN. W.CTable 8 – 48EZ-AWet Coil Pressure Drop IN. W.C 48EZ --AHeating 48EZ --A1234 48EZ --A1402 48EZ --A1445 48EZ --A48EZ A Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48EZ-AFig. 16 - 208/230-3-60Wiring Diagram, Unit 48EZ-A 48EZ --AA09209 Fig. 17 - Cooling Charging Table-Subcooling 48EZ --AA08019 Indoor Blower and Motor MAINTENANCECleaning the Blower Motor and Wheel Air FilterFig. 19 - Unit Access Panels Limit SwitchInduced Draft combustion air Blower Assembly Fig. 18 - Blower Housing and Flue Collector BoxFig. 20 - Removal of Motor and Blower Wheel Electrical Controls and WiringOutdoor Fan Refrigerant CircuitPage EXPLOSION HAZARD High-PressureSwitchFig. 25 - Refrigerant Circuit Copeland Scroll Compressor Puron RefrigerantCompressor Oil UNIT OPERATION AND SAFETY HAZARDLEGEND Refrigerant SystemLiquid Line Filter Drier TROUBLESHOOTINGSTART-UPCHECKLIST Synthetic Roof Precautionary Procedure48EZ --A SYMPTOMTable 12 – Troubleshooting Guide–Heating Table 13 – Troubleshooting Guide–LEDError Codes48EZ --A PRESSURES TEMPERATURESRemove and Store in Job Files I. PRELIMINARY INFORMATION MODEL NOReplaces: 48EZ---05SI 48EZ --ACatalog No: 48EZ---06SI Edition Date: 08/09