Manuals / Carrier / Household Appliance / Electric Heater

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

Models: 48EZ(N)-A

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48EZ -- A

A09450

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

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Carrier 48EZ(N)-A 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 ROOF CURB DETAIL Fig. 4 - Roof Curb DimensionsB C G H F A E D SMALL CURBInspection Step 3 - Field Fabricate DuctworkStep 4 - Provide Clearances Step 5 - Rig and Place UnitRigging/Lifting of Unit See Fig. Step 7 - Install Flue HoodStep 8 - Install Gas Piping Step 6 - Connect Condensate DrainFIRE OR EXPLOSION HAZARD Fig. 7 - Sediment Trap48EZ --A ELECTRICAL SHOCK HAZARD Step 9 - Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge Fig. 8 - Supply and Return Duct Opening48EZ --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 10 - Install Electrical ConnectionsSpecial Procedures for 208-VOperation High-VoltageConnectionsThermostat Balance Point Setting-Thermidistator HybridPRE-START-UP Control Voltage ConnectionsStep 2 - Unit Sequence of Operation Step 3 - Start-upHeating and Make Adjust- mentsSTART-UP Step 1 - Check for Refrigerant LeaksTable 4 - Altitude Derate Multiplier for U.S.A Adjust Gas InputFig. 11 - Burner Assembly Check Gas InputRollout Switch Step 4 - Start-upCooling and Make Adjust- mentsAirflow and Temperature Rise Limit SwitchesUNIT OPERATION HAZARD Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments Gas Heating Fan Speed Set-up48EZ --A Continuous Fan OperationTable 6 - Color Coding for Indoor Fan Motor Leads Fig. 13 - Interface Fan Board IFB48EZ--A Heating Rise 48EZ--A1234 48EZ--A1295 48EZ--A1402 48EZ--A1402 48EZ--AUNIT 48EZ--AUNIT 48EZ--AA10207C 48EZ AA10207L 48EZ AA10208C 48EZ AA10208L 48EZ AFig. 16 - Cooling Charging Table-Subcooling 48EZ --AA08019 Indoor Blower and Motor MAINTENANCECleaning the Blower Motor and Wheel Air FilterFig. 18 - Unit Access Panels Limit SwitchInduced Draft combustion air Blower Assembly Fig. 17 - Blower Housing and Flue Collector BoxFig. 19 - Removal of Motor and Blower Wheel Electrical Controls and WiringOutdoor Fan Refrigerant CircuitPage EXPLOSION HAZARD High-PressureSwitchFig. 24 - Refrigerant Circuit Copeland Scroll Compressor Puron Refrigerant48EZ --A UNIT OPERATION AND SAFETY HAZARDRefrigerant System Compressor OilLiquid Line Filter Drier TROUBLESHOOTINGSTART-UPCHECKLIST Synthetic Roof Precautionary Procedure48EZ --A SYMPTOMTable 13 - Troubleshooting Guide-Heating Table 14 - Troubleshooting Guide-LEDError Codes48EZ --A PRESSURES TEMPERATURESRemove and Store in Job Files I. PRELIMINARY INFORMATION MODEL NO