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Carrier 48TC*D08 appendix Orifice Replacement, Gas Valve

Models: 48TC*D08

1 98

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48TC

	C08240
48TCDD08 only	All 48TC*D except DD08	C08241
	All 48TC*D except DD08

Fig. 38 - Gas Valve

Orifice Replacement

This unit uses orifice type LH32RFnnn (where nnn indicates orifice reference size). When replacing unit orifices, order the necessary parts via Carrier RCD. See Table 11 for available orifice sizes. See Table 12 for orifice sizes for Natural Gas and LP fuel usage at various elevations above sea level.

Check that each replacement orifice is tight at its threads into the manifold pipe and that orifice projection does not exceed maximum value. (See Fig. 34.)

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Carrier 48TC*D08 appendix Orifice Replacement, Gas Valve

Contents

Service and Maintenance Instructions TABLE OF CONTENTSSAFETY CONSIDERATIONS With Puron R---410ARefrigerantFig. 1 - Typical Access Panel Locations Back UNIT ARRANGEMENT AND ACCESSUNIT OPERATION AND SAFETY HAZARD GeneralFig. 2 - Typical Access Panel Location Front Routine MaintenanceSeasonal Maintenance Air ConditioningSUPPLY FAN BLOWER SECTION Fig. 3 - Filter InstallationFig. 4 - Screens Installed on Outdoor-AirHood Supply Fan Belt-DriveFig. 7 - Tightening Locking Collar Motor Adjustable-PitchPulley on MotorFig. 6 - Supply-FanPulley Adjustment Bearings 48TCCOOLING Coil Maintenance and Cleaning RecommendationPeriodic Clean Water Rinse Condenser CoilPERSONAL INJURY HAZARD Routine Cleaning of Evaporator Coil SufacesPERSONAL INJURY HAZARD PERSONAL INJURY HAZARDPURONR R-410AREFRIGERANT Refrigerant System Pressure Access PortsTo Use Cooling Charging Charts Refrigerant ChargeFig. 9 - CoreMax Access Port Assembly SEATCORE48TC COOLING CHARGING CHARTS Fig. 10 - Cooling Charging Charts D0848TC 48TC Fig. 11 - Cooling Charging Charts D12COOLING CHARGING CHARTS C0867048TC Fig. 12 - Cooling Charging Charts D14 - Circuit ACOOLING CHARGING CHARTS C0915148TC Fig. 13 - Cooling Charging Charts D14 - Circuit BCOOLING CHARGING CHARTS C09152Table 1 - Cooling Service Analysis 48TCTroubleshooting Cooling System Condenser-FanAdjustment D08-D12sizeCondenser-FanAdjustment D14 size Fig. 14 - Condenser Fan Adjustment D08-D12Fig. 17 - Powered Convenience Outlet Wiring Non-PoweredTypeUnit-PoweredType CONVENIENCE OUTLETSUsing Unit-MountedConvenience Outlets MaintenanceFuse On Powered Type Fig. 18 - Controller AssemblyFig. 19 - Smoke Detector Sensor Smoke Detector LocationsLocation Fig. 21 - Typical Return Air Detector LocationFig. 23 - Return Air Detector Shipping Position FIOP Smoke Detector Wiring and ResponseFig. 22 - Return Air Sampling Tube Location Fig. 24 - Return Air Sensor Operating PositionSensor Alarm Test Procedure Fig. 25 - Typical Smoke Detector System WiringSensor Alarm Test Controller Alarm TestDirty Sensor Test Procedure Controller Alarm Test ProcedureDirty Controller Test Procedure To Configure the Dirty Sensor Test OperationRemote Test/Reset Station Dirty Sensor Test Detector CleaningSD-TRK4Remote Alarm Test Procedure Dirty Sensor Test Using an SD-TRK4Alarm State INDICATORSTroubleshooting Fig. 28 - Controller AssemblyOvertemperature Table 3 – Detector IndicatorsController’s Power LED is Off High Pressure SwitchControl Circuit Fig. 30 - Limit Switch LocationGAS HEATING SYSTEM Fuel Types and PressuresCombustion-AirBlower Fig. 31 - LP Low Pressure Switch InstalledFlue Gas Passageways 48TCBurners and Igniters Fig. 33 - Heat Exchanger AssemblyRemoval and Replacement of Gas Train EQUIPMENT DAMAGE HAZARDFig. 35 - Burner Tray Details Cleaning and AdjustmentLimit Switch Fig. 36 - Unit Control Box/IGC LocationBurner Ignition Fig. 37 - Spark AdjustmentTable 9 – LED Error Code Description 48TCOrifice Replacement Fig. 38 - Gas Valve48TC Red LED-Status Fig. 39 - Integrated Gas Control IGC BoardTable 10 - IGC Connections 48TCTable 11 – Orifice Sizes Table 12 - Altitude Compensation*48TC Table 13 – Heating Service Analysis Troubleshooting Heating SystemMinimum Heating Entering Air Temperature Fig. 40 - OATL Connections48TC Table 14 – IGC Board LED Alarm CodesRESET METHOD DESCRIPTIONReplacing NOVATION Condenser Coil CONDENSER COIL SERVICERepairing NOVATION Condenser Tube Leaks Fig. 41 - PremierLinkt Controller48TC PREMIERLINKt CONTROLSUPPLY AIR TEMPERATURE SENSOR SUPPLY AIR ROOF CURB RETURN AIR48TC C08665Fig. 44 - T-55Space Temperature Sensor Wiring Fig. 45 - PremierLink T-55Sensor48TC Table 16 – PremierLink Sensor Usage Table 17 - Space Sensor Mode48TC Fig. 47 - PremierLink T-56Sensor Table 18 – Thermostat ModeFig. 46 - T-56Internal Connections Fig. 48 - Space Thermostat ConnectionsEnthalpy Fig. 52 - Indoor CO2 Sensor 33ZCSENCO2 33ZCSENCO2 - Typical Wiring DiagramFig. 51 - Indoor/Outdoor Air Quality CO2 Sensor ConnectionsFig. 57 - PremierLink Wiring Remote Occupied Fig. 55 - PremierLink Filter Switch ConnectionFig. 56 - PremierLink Wiring Fan Pressure Switch ConnectionTable 19 – Recommended Cables Fig. 58 - PremierLinkt Power Exhaust OutputRTU-MPCONTROL SYSTEM Table 20 – Color Code RecommendationsFig. 60 - RTU-MP Multi-ProtocolControl Board 48TCC07129 48TC C0916348TC Table 21 – RTU-MPController Inputs and OutputsCONFIGURABLE POINT NAMEFig. 62 - RTU-MP T-55Sensor Connections Space Temperature SPT SensorsFig. 64 - Space Temperature Sensor Typical Wiring Fig. 63 - RTU-MP T-56Sensor ConnectionsFig. 65 - RTU-MP /Indoor CO2 Sensor 33ZCSENCO2 Connections48TC Communication Wiring - Protocols Connecting Discrete InputsPower Exhaust output Fig. 67 - RTU-MPPower Exhaust ConnectionsLocal Access RTU-MPTroubleshootingFig. 68 - RTU-MPSW3 Dip Switch Settings BACnet MS/TPAnd Error LED shows Fig. 69 - BACview6 Handheld ConnectionsTable 22 – LEDs 48TC48TC Table 23 – Troubleshooting AlarmsRESET ACTION TAKEN BYFire Shutdown Alarm AlarmsSafety Chain Alarm SAT Sensor AlarmFig. 70 - Module Status Report Modstat Example 48TCTable 24 – Manufacture Date Table 25 – Basic Protocol TroubleshootingModbus Table 26 – Modbus Exception Codes that May beFig. 72 - EconoMi$er2 Component Locations ECONOMI$ER SYSTEMSFig. 71 - EconoMi$er IV Component Locations 48TCFig. 73 - EconoMi$er IV Wiring 48TCTable 27 – EconoMi$er IV Input/Output Logic Outdoor Air Temperature OAT SensorEconoMi$er Fig. 75 - EconoMi$er IV Functional ViewFig. 76 - Supply Air Sensor Location Supply Air Temperature SAT SensorFig. 78 - Outside Air Temperature Changeover Outdoor Air Lockout SensorMounting Location Differential Dry Bulb ControlOutdoor Enthalpy Changeover Fig. 81 - Enthalpy Changeover SetpointsFig. 82 - EconoMi$er IV Control Fig. 83 - CO2 Sensor Maximum Range SettingsExhaust Setpoint Adjustment Differential Enthalpy ControlDemand Control Ventilation DCV Damper MovementThermostats 48TCCO2 Sensor Configuration Table 28 – CO2 Sensor Standard Settings48TC Differential Enthalpy Table 29 - EconoMi$er IV Sensor UsageEconoMi$er IV Preparation Single EnthalpyDCV Minimum and Maximum Position WIRING DIAGRAMSEconoMi$er IV Troubleshooting Completion Supply-AirSensor Input48TC C0915648TC C09157Unit Preparation PRE-START-UPSTART-UP,GENERAL Gas PipingReturn-AirFilters Internal WiringRefrigerant Service Ports Outdoor-AirInlet ScreensSTART-UP,PREMIERLINKt CONTROLS Field Service TestMemory Reset START-UP, RTU-MPCONTROLFilter Service Hours ConfigurationUnit Start Delay Supply Fan Service HoursHeating Heating SAT High Setpt Cooling/Econ SAT Low SetptCooling Lockout Temp Heating Lockout TempIAQ Low Reference @ 4mA Power Exhaust SetptT55/56 Override Duration IAQ High Reference @ 20mACooling, Units Without Economizer OPERATING SEQUENCESBase Unit Controls Heating, Units Without EconomizerSupplemental Controls PremierLinkt Control48TC IAQS = IAQD + OAQ OAQ = 400 ppm if not present 48TCSWhen Pre-OccupancyPurge is active 48TCTable 30 – Available Cooling Stages 48TC48TC S Indoor fan has been ON for at least 30 secondsIAQS = IAQD + OAQ OAQ = 400 ppm if not present 48TCTable 31 – Linkage Modes 48TCRTU-MPSequence of Operation Table 32 – Loadshed Command — Gas and ElectricAlways Occupied Default Occupancy Heat UnitsDI On/Off BACnet ScheduleBAS On/Off Indoor FanEconomizer Power ExhaustFASTENER TORQUE VALUES Indoor Air QualityTable 33 – Torque Values 48TCSerial Number Format APPENDIX I. MODEL NUMBER SIGNIFICANCEModel Number Nomenclature 48TC7.5 - 12.5TONS APPENDIX II. PHYSICAL DATAPhysical Data CoolingHeating APPENDIX II. PHYSICAL DATA contPhysical Data 7.5 - 12.5TONS7.5 TON HORIZONTAL SUPPLY 3 PHASEAPPENDIX III. FAN PERFORMANCE 7.5 TON VERTICAL SUPPLY48TC**12 10 TON HORIZONTAL SUPPLY10 TON VERTICAL SUPPLY 3 PHASE12.5 TON HORIZONTAL SUPPLY 48TC**1412.5 TON VERTICAL SUPPLY 3 PHASEPulley Adjustment APPENDIX III. FAN PERFORMANCE cont48TC 48TC*D08 ELECTRICAL INFORMATION48TC 2---StageCooling48TC MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.OAPPENDIX IV. WIRING DIAGRAM LIST Wiring Diagrams48TC APPENDIX V. MOTORMASTER SENSOR LOCATIONS Fig. 86 - 48TC*D08-D12Outdoor Circuiting48TC I. PRELIMINARY INFORMATION UNIT START-UPCHECKLISTTEMPERATURES III. START-UP