Carrier 48TCA04---A12

Single Stage 2 Stage

C08210

Fig. 37 --Gas Valves

Red LED-Status

C08452

Fig. 38 --Integrated Gas Control (IGC) Board

48TC

Contents

Main 48TCA04---A12 Nominal 3 to 10 Tons With Puron(R---410A) Refrigerant Service and Maintenance Instructions TABLEOF CO NTENTS SAFETY CONSIDERATIONS UNIT ARRANGEMENT AND ACCESS General RoutineMaintenance Seasonal Maintenance SUPPLYFAN (BLOWER) SECTION Supply Fan (Belt--Drive) COOLING CondenserCoil CondenserCoil Maintenance and Cleaning Recommendation Page Evaporator Coil Refrigerant System Pressure Access Ports PURONR(R--410A)REFRIGERANT Refrigerant Charge SEAT CORE COOLING CHARGING CHARTS Page Page Page Table1 Cooling Service Analysis Compressor FilterDrier Condenser--Fan Adjustment TroubleshootingCooling System CONVENIENCE OUTLETS SMOKE DETECTORS System Controller Sensor Smoke Detector Locations Completing Installation of Return Air Smoke Sensor: FIOP Smoke Detector Wiring and Respon se A D C F E Page Detector Cleaning INDICATORS Troubleshooting PROTECTIVE DEVICES Compresso r Protection ReliefDevice ControlCircuit, 24--V GAS HEATING SYSTEM Fuel Typesand Pressures Flue Gas Passageways Combustion--AirBlower Burners and Igniters Burner Ignition OrificeReplacement Page Table9 IGC Conne ctions Table10 Orifice Sizes Table11 Altitude Com pensation* (A04--A07) Table11 (cont.) --Altitude Compensation* (A08 --A12) TroubleshootingHeating System Table13 He ating Service Analysis Table14 IGC Board LED Alarm Codes PREMIERLINKTCONTROL Page Page Table16 PremierLink Sensor Usage Table17 Space Se nsor Mode Page 6 7 LCTB ECON 3 2 Enthalpy Switch GRA GRA Factory Wiring Harness } Page RTU--MP CONTROL SYSTEM Page Page Page Space Temperature (SPT) Sensors SEN COM J4-2 J4-3 IAQ Sensor 24 VAC ConnectingDiscrete Inputs PowerExhaust (output) Power Exhaust J11-3 C THERMOSTAT PEC TAN GRA RTU--MP Troubleshooting Table22 LEDs The LEDson the RTU--MPshow the status of certain functions Table23 Troubleshooting Al arms Alarms BACnet MS/TP Page Modbus N2 ECONOMIZER SYSTEMS Fig. 72 --EconoMi$er IV Wiring 4 3 5 2 8 6 7 1 10 11 9 12 Fig. 73 --EconoMi$er2 with 4 to 20 mA Control Wiring RUN YELLOW EconoMi$er IV Page Page Page Page Page WIRING DIAGRAMS Page Page PRE--START--UP START--UP,GENERAL Unit Preparation Gas Piping Return--AirFilters Cooling Main Burners Heating Ventilation(Continuous Fan) START--UP, PREMIERLINK CONTROLS Perform System Check--Out Initial Operation and Test START--UP, RTU--MPCONTROL Field Service Test Configuration Page OPERATINGSEQUENCES Base Unit Controls Cooling, Units Without Economizer Heating, Units WithoutEconomizer Cooling, Unit With EconoMi$er IV Heating WithEconoMi$er IV PremierLink Control Page Page Page Page Page RTU--MP Sequenceof Operation Page Page FASTENERTORQUE VALUES APPENDIX I. MODEL NUMBER SIGNIFICANCE ModelNumber Nomenclature 4 8 T C D A 0 4 A 1 A 5 -- 0 A 0 A 0 Serial Number Format APPENDIX II. PHYSICAL DATA Physical Data (Cooling) 3 --6 TONS Physical Data (Cooling) 7.5 --10 TONS Physical Data (Heating) 3 --6 TONS Physical Data (Heating) 7.5 --10 TONS APPENDIX III. FAN PERFORMANCE General Fan Performance Notes: 48TC**04 1 Phase 3 TonHorizontal Supply 48TC**04 1 Phase 3 TonVertical Supply 48TC**04 3 Phase 3 TonHorizontal Supply 48TC**04 3 Phase 3 TonVertical Supply 48TC**05 1 Phase 4 TonHorizontal Supply 48TC**05 1 Phase 4 TonVertical Supply 48TC**05 3 Phase 4 TonHorizontal Supply 48TC**05 3 Phase 4 TonVertical Supply 48TC**06 1 Phase 5 TonHorizontal Supply 48TC**06 1 Phase 5 TonVertical Supply 48TC**06 3 Phase 5 TonHorizontal Supply 48TC**06 3 Phase 5 TonVertical Supply 48TC**07 3 Phase 6 TonHorizontal Supply 48TC**07 3 Phase 6 TonVertical Supply 48TC**08 3 PHASE 7.5 TON HORIZONTALSUPPLY 48TC**08 3 PHASE 7.5TON VERTICAL SUPPLY FAN PERFORMANCE(cont.) 48TC**09 3 PHASE 8.5 TON HORIZONTALSUPPLY 48TC**09 3 PHASE 8.5 TON VERTICAL SUPPLY FAN PERFORMANCE(cont.) 48TC**12 3 PHASE 10 TON HORIZONTALSUPPLY 48TC**12 3 PHASE 10 TON VERTICAL SUPPLY Pulley Adjustment APPENDIX IV.ELECTRICAL DATA 48TC**04 3 TONS 48TC**05 4 TONS 48TC**06 5 TONS 48TC**07 6 TONS 48TC**08 7.5 TONS 48TC**09 8.5 TONS 48TC**12 10 TONS MCA/MOCPDETERMINATION NO C.O. OR UNPWRD C.O. See notes on next page. Page APPENDIX V.WIRING DIAGRAM LIST Wiring Diagrams APPENDIX VI. MOTORMASTER SENSOR LOCATIONS Page UNIT START-UP CHECKLIST I. PRELIMINARY INFORMATION: II. PRE-START-UP(insert check mark in b ox as each item is completed): III. START-UP ELECTRICAL