Carrier 50DU INFINITY 14 Installation Instructions Manual

£n to the ExpertgInstallation InstructionsIMPORTANT: OAT sensor must be field installed. SeeAccessory Installation for more details.IMPORTANT: This Infinity _ unit is designed for use with anInfinity User Interface.NOTE: Read the entire instruction manual before starting theinstallation.TABLE OF CONTENTSPageSAFETY CONSIDERATIONS ........................ 2INTRODUCTION .................................. 2RECEIVING AND INSTALLATION ................ 2-10Check Equipment ................................. 2Identify Unit ................................... 2Inspect Shipment ................................ 2Provide Unit Support .............................. 2Roof Curb ..................................... 2Slab Mount .................................... 2Ground Mount ................................. 2Provide Clearances ................................ 6Rig and Place Unit ................................ 6Inspection ..................................... 6Introduction .................................... 6Use of Rigging Bracket ........................... 6Select and Install Ductwork .......................... 7Converting Horizontal Discharge Units to Downflow(Vertical) Discharge Units ......................... 8Provide for Condensate Disposal ..................... 8Install Electrical Connections ........................ 8High-Voltage Connections ........................ 8Routing Power Leads Into Unit .................... 10Connecting Ground Lead to Ground Screw .......... 10Routing Control Power Wires .................... 10Accessory Installation ........................... 10Special Procedures for 208-v Operation ............. 10PRE-START-UP .................................. 12START-UP .................................... 12-19Unit Start-Up ................................... 12Sequence of Operation ............................ 16Check for Refrigerant Leaks ........................ 18Start-Up Adjustments ............................. 18Checking Cooling and Heating Control Operation ..... 18Checking and Adjusting Refrigerant Charge .......... 18Refrigerant Charge ............................. 18No Charge .................................... 18Low Charge Cooling ............................ 18To Use Cooling Charging (;harts ................... 19Indoor Airflow and Airflow Adjustments ............ 19Non-Comnmnicating Emergency Cooling/Heating Mode . 19Fig. 1 - Unit 50DUA05307MAINTENANCE ............................... 19-23Air Filter ....................................... 21Indoor Fan and Motor ............................. 21Outdoor (;oil. Indoor Coil. and Condensate Drain Pan .... 21Outdoor Fan .................................... 21Electrical Controls and Wiring ...................... 21Refrigerant Circuit ................................ 21Indoor Airflow .................................. 22Metering Devices-TXV & AccuRater Piston .......... 22Pressure Switches ................................ 22Loss-of-Charge Switch ........................... 22High-Pressure Switches ........................... 22Copeland Scroll Compressor (Puron _: Refrigerant) ....... 22Refrigerant System ............................... 22Refrigerant ................................... 22Compressor Oil ................................ 22Servicing Systems on Roofs with Synthetic Materials ... 22Liquid-Line Filter Drier ......................... 23Puron (R-410A) Refrigerant Charging .............. 23TROUBLESHOOTING ............................. 23FINAL CHECKS .................................. 24CARE AND MAINTENANCE ....................... 24START-UP CHECKLIST ........................... 27