Carrier 48EZ(N)-A Installation Instructions Manual

Also see for 48EZ(N) - A: Installation instructions

Contents

148EZ(N) ---AComfort t 13 SEER Single ---Packaged HYBRID HEATrDual Fuel System with Puron® (R ---410A) RefrigerantSingle and Three Phase2---5 Nominal Tons (Sizes 24---60)Installation InstructionsNOTE: Read the entire instruction manual before starting theinstallation.NOTE: Installer: Make sure the Owner’s Manual and ServiceInstructions are left with the unit after installation.TABLE OF CONTENTSPAGESAFETY CONSIDERATIONS 1--2. . . . . . . . . . . . . . . . . . . . . . .INTRODUCTION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RECEIVING AND INSTALLATION 2--13. . . . . . . . . . . . . . . . .Check Equipment 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Identify Unit 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inspect Shipment 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Provide Unit Support 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Roof Curb 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Slab Mount 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Field Fabricate Ductwork 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .Provide Clearances 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rig and Place Unit 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connect Condensate Drain 7. . . . . . . . . . . . . . . . . . . . . . . . . . .Install Flue Hood 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Install Gas Piping 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Install Duct Connections 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Configuring Units for Downflow (Vertical)Discharge 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Install Electrical Connections 12. . . . . . . . . . . . . . . . . . . . . . . .High--Voltage Connections 12. . . . . . . . . . . . . . . . . . . . . . . .Special Procedures for 208--V Operation 12. . . . . . . . . . . . . .Control Voltage Connections 13. . . . . . . . . . . . . . . . . . . . . . .Balance Point Setting Thermidistat or Hybrid HeatThermostat 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Transformer Protection 13. . . . . . . . . . . . . . . . . . . . . . . . . . .PRE--START--UP 13--14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START--UP 14--17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check for Refrigerant Leaks 14. . . . . . . . . . . . . . . . . . . . . . . . .Unit Sequence of Operation 14. . . . . . . . . . . . . . . . . . . . . . . . .Start--Up Heating and Make Adjustments 14. . . . . . . . . . . . . . .Checking Heating Control 14. . . . . . . . . . . . . . . . . . . . . . . . .Check Gas Input 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust Gas Input 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Burner Flame 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Start--Up Cooling and Make Adjustments 16. . . . . . . . . . . . . . .Checking Cooling Control Operation 16. . . . . . . . . . . . . . . .Checking and Adjusting Refrigerant 17. . . . . . . . . . . . . . . . .Indoor Airflow and Airflow Adjustments 17. . . . . . . . . . . . .MAINTENANCE 32--38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air Filter 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indoor Blower and Motor 32. . . . . . . . . . . . . . . . . . . . . . . . . . .Flue Gas Passageways 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Limit Switch 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Burner Ignition 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Main Burners 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Outdoor Coil, Indoor Coil, & Condensate Drain Pan 33. . . . . .Outdoor Fan 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrical Controls and Wiring 34. . . . . . . . . . . . . . . . . . . . . . .Refrigerant Circuit 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A09034Fig. 1 -- Unit 48EZ--AGas Input 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indoor Airflow 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Defrost Thermostat 35. . . . . . . . . . . . . . . . . . . . . . . . . . .PuronR Items 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TROUBLESHOOTING 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START--UP CHECKLIST 38. . . . . . . . . . . . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSInstallation and servicing of this equipment can be hazardous dueto mechanical and electrical components. Only trained andqualified personnel should install, repair, or service this equipment.Untrained personnel can perform basic maintenance functions suchas cleaning and replacing air filters. All other operations must beperformed by trained service personnel. When working on thisequipment, observe precautions in the literature, on tags, and onlabels attached to or shipped with the unit and other safetyprecautions that may apply.Follow all safety codes. Wear safety glasses, protective clothing,and work gloves. Have fire extinguisher available. Read theseinstructions thoroughly and follow all warnings or cautionsincluded in literature and attached to the unit. Consult localbuilding codes, the current editions of the National Fuel Gas Code(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code(NEC) NFPA 70.In Canada refer to the current editions of the National Standards ofCanada CAN/CSA--B149.1 and .2 Natural Gas and PropaneInstallation codes, and Canadian Electrical Code CSA C22.1.Recognize safety information. This is the safety--alert symbol .When you see this symbol on the unit and in instructions or manu-als, be alert to the potential for personal injury. Understand thesesignal words: DANGER, WARNING, and CAUTION. Thesewords are used with the safety--alert symbol. DANGER identifiesthe most serious hazards which will result in severe personal injuryor death. WARNING signifies hazards which could result in per-sonal injury or death. CAUTION is used to identify unsafe practic-