Carrier 48TC*D08 Cooling/Econ SAT Low Setpt, Cooling Lockout Temp, Heating Heating SAT High Setpt

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Cooling/Econ SAT Low Setpt

The supply air temperature must remain above this value to allow cooling with the economizer and/or compressors. There is 5_F plus and minus deadband to this point. If the SAT falls below this value during cooling, all compressors will be staged off. The economizer will start to ramp down to minimum position when the SAT = this configuration +5_F.

Factory Default = 50_F Range = 45-75_F

Cooling Lockout Temp

This defines the minimum outdoor air temperature that cooling mode can be enabled and run. If the OAT falls below this threshold during cooling, then compressor cooling will not be allowed.

Factory Default = 45_F Range = 0-65_F

Heating

Heating SAT High Setpt

The supply air temperature must remain below this value to allow heating. There is 5_F plus and minus deadband to this point. If the SAT rises above this value during heating the heat stages will begin to decrease until the SAT has dropped below this value.

Factory Default = 120_F Range = 95-150_F

Heating Lockout Temp

This defines the maximum outdoor air temperature that heating mode can be enabled and run. If the OAT rises above this threshold during heating, then heating will not be allowed.

Factory Default = 65_F Range = 49-95_F

Inputs

NOTE: For installation of inputs and field installed accessories, refer to the appropriate sections.

Input 3

This input is a discrete input and can be configured to be one of five different inputs: No Function, Compressor Safety, Fan Status, Filter Status, or Remote Occupancy. This input can also be configured to be either Normally Open (N/O) or Normally Closed (N/C). Input 3 is factory wired to pin J1-2. Field accessories get wired to its parallel pin J5-5. Do not connect inputs to both locations, one function per input.

Factory Default = Compressor Safety and N/O

NOTE: Compressor Safety input comes from the CLO board. J1-2 is always factory wired to TB1-8 (X) terminal on the unit. If the unit has a CLO board, do not configure input 3 for anything but Compressor Safety.

Input 5

This input is a discrete input and can be configured to be one of five different inputs: No Function, Fire Shutdown, Fan Status, Filter Status, or Remote Occupancy. This input can also be configured to be either Normally Open (N/O) or Normally Closed (N/C). Input 5 is factory wired to pin J1-10. Field accessories get wired to its parallel pin J5-3. Do not connect inputs to both locations, one function per input.

Factory Default = Fire Shutdown and N/C

NOTE: Fire Shutdown input comes from TB4-7. J1-10 is always factory wired to TB4-7. Only change input 5s function if absolutely needed.

Input 8

This input is a discrete input and can be configured to be one of five different inputs: No Function, Enthalpy Switch, Fan Status, Filter Status, or Remote Occupancy. This input can also be configured to be either Normally Open (N/O) or Normally Closed (N/C). Input 8 is factory wired to pin J2-6. Field accessories get wired to its parallel pin J5-1. Do not connect inputs to both locations, one function per input.

Factory Default = No Function and N/O

Input 9

This input is a discrete input and can be configured to be one of five different inputs: No Function, Humidistat, Fan Status, Filter Status, or Remote Occupancy. This input can also be configured to be either Normally Open (N/O) or Normally Closed (N/C). Input 9 is factory and field wired to pin J5-7. Do not connect inputs to both locations, one function per input.

Factory Default = Humidistat and N/O

Space Sensor Type

This tells the controller what type of space sensor is installed to run the unit. The three types that can be used are the T55 space sensor, the T56 space sensor, or the RS space sensor.

Factory Default = T55 Type

Input 1 Function

This input is an analog input and can be configured to be one of five different inputs: No Sensor, IAQ Sensor, OAQ Sensor, Space RH Sensor, or Outdoor RH Sensor. Input 1 is wired to pin J4-5.

Factory Default = No Sensor

Input 2 Function

This input is an analog input and can be configured to be one of five different inputs: No Sensor, IAQ Sensor, OAQ Sensor, Space RH Sensor, or Outdoor RH Sensor. Input 2 is wired to pin J4-2.

Factory Default = No Sensor

Setpoint Slider Range

This sets the slider range of the space sensor (with this built in function). The slider is used to offset the current control setpoint.

Factory Default = 5 n_F Range = 0-15 n_F

48TC

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Contents Safety Considerations Table of ContentsGeneral Unit Arrangement and AccessWhat to do if you smell gas Seasonal Maintenance Routine MaintenanceSupply Fan Belt-Drive Supply FAN Blower SectionManual Outside Air Hood Screen Supply-Fan Pulley Adjustment Bearings Adjustable-Pitch Pulley on MotorPeriodic Clean Water Rinse Coil Maintenance and Cleaning RecommendationCooling Condenser CoilRoutine Cleaning of Evaporator Coil Sufaces Routine Cleaning of Novation Condenser Coil SurfacesPuronr R-410A Refrigerant Refrigerant System Pressure Access PortsRefrigerant Charge Seatcore Cooling Charging Charts D08 Cooling Charging ChartsCooling Charging Charts D12 Cooling Charging Charts D14 Circuit a Cooling Charging Charts D14 Circuit B Problem Cause Remedy Cooling Service AnalysisCondenser-Fan Adjustment D14 size Condenser-Fan Adjustment D08-D12 sizeTroubleshooting Cooling System CompressorsUnit-Powered Type Non-Powered TypeConvenience Outlets Duty CycleSmoke Detectors Typical Supply Air Smoke Detector Sensor Location Smoke Detector LocationsFiop Smoke Detector Wiring and Response Completing Installation of Return Air Smoke SensorSensor Alarm Test Procedure Sensor Alarm TestController Alarm Test Sensor and Controller TestsDirty Controller Test Procedure Controller Alarm Test ProcedureDirty Sensor Test Procedure To Configure the Dirty Sensor Test OperationSD-TRK4 Remote Alarm Test Procedure Detector CleaningRemote Test/Reset Station Dirty Sensor Test Dirty Sensor Test Using an SD-TRK4Troubleshooting Compressor Protection Protective DevicesControl Circuit GAS Heating SystemFuel Types and Pressures Combustion-Air Blower Flue Gas PassagewaysMain Burners Burners and IgnitersCheck Unit Operation and Make Necessary Adjustments Cleaning and AdjustmentLimit Switch LED Indication Error Code Description LED Error Code DescriptionBurner Ignition Gas Valve Orifice ReplacementOutputs Integrated Gas Control IGC Board IGC ConnectionsAltitude Compensation Orifice SizesOrifice Carrier Drill Drill Size Part Number ElevationMinimum Heating Entering Air Temperature Troubleshooting Heating SystemHeating Service Analysis Problem Cause RemedyIGC IGC Board LED Alarm CodesRepairing Novation Condenser Tube Leaks Condenser Coil ServiceReplacing Novation Condenser Coil PREMIERLINKt Control Typical PremierLinkt System Control Wiring Diagram Temp Resistance 55 Space Temperature Sensor WiringTB1 Terminal Field Connection Input Signal Space Sensor ModePremierLink Sensor Usage 56 Internal Connections Thermostat ModeLctb Indoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection RTU-MP Control System Signal Type CCN BUS Wire CCN Plug PIN Color NumberRecommended Cables Color Code RecommendationsRTU-MP Multi-Protocol Control Board Typical RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Configurable InputsPoint Name Type of I/O Connection PIN Name Numbers InputsRTU-MP T-55 Sensor Connections Space Temperature SPT SensorsRTU-MP / Indoor CO2 Sensor 33ZCSENCO2 Connections Power Exhaust output Connecting Discrete InputsCommunication Wiring Protocols RTU-MP Troubleshooting LEDs BACview6 Handheld ConnectionsTroubleshooting Alarms BACnet MS/TP AlarmsModule Status Report Modstat Example Modbus Basic Protocol TroubleshootingManufacture Date Code Name MeaningEconoMi$er IV Component Locations ECONOMI$ER SystemsEconoMi$er IV Wiring EconoMi$er IV Input/Output Logic EconoMi$erInputs Outputs Outdoor Air Lockout Sensor Supply Air Temperature SAT SensorEconoMi$er IV Control Modes Outdoor Dry Bulb ChangeoverOutdoor Enthalpy Changeover Differential Dry Bulb ControlIndoor Air Quality IAQ Sensor Input Exhaust Setpoint AdjustmentMinimum Position Control Thermostats Damper MovementDemand Control Ventilation DCV CO2 Sensor Standard Settings CO2 Sensor ConfigurationAnalog CO2 EconoMi$er IV Sensor Usage DCV Demand Controlled Ventilation and Power ExhaustEconoMi$er IV Preparation Differential EnthalpyEconoMi$er IV Troubleshooting Completion Wiring DiagramsDCV Minimum and Maximum Position Supply-Air Sensor Input48TC Typical Unit Wiring Diagram Power D08, 208/230-3-60 48TC Typical Unit Wiring Diagram Control D08, 208/230-3-60 START-UP, General PRE-START-UPUnit Preparation Gas PipingRefrigerant Service Ports Internal WiringReturn-Air Filters Outdoor-Air Inlet ScreensSTART-UP, RTU-MP Control Field Service TestVentilation Continuous Fan Perform System Check-OutConfiguration Cooling Lockout Temp Cooling/Econ SAT Low SetptHeating Heating SAT High Setpt Heating Lockout TempT55/56 Override Duration Power Exhaust SetptIAQ Low Reference @ 4mA IAQ High Reference @ 20mAOperating Sequences PremierLinkt Control Supplemental Controls48TC 48TC Number Stages Economizer Available Cooling Stages48TC 48TC Linkage Modes Rooftop Mode Value Linkage ModeAlways Occupied Default Occupancy Loadshed Command Gas and Electric Heat UnitsRTU-MP Sequence of Operation SchedulingBAS On/Off BACnet ScheduleDI On/Off Indoor FanFastener Torque Values Power ExhaustEconomizer Indoor Air QualityTorque Values Model Number Nomenclature Appendix I. Model Number SignificanceSerial Number Format Position Number Typical DesignatesPhysical Data Appendix II. Physical Data12.5TONS Physical Data Heating 12.5TONS Heat Anticipator Setting Amps48TC**08 48TC**12 48TC**14 Gas Connection Natural Gas Heat, Liquid Propane HeatCFM RPM BHP Appendix III. FAN Performance579 FAN PerformanceRPM BHP 48TC**14Unit MOTOR/DRIVE Motor Pulley Turns Open Combo Pulley AdjustmentElectrical Information MCA/MOCP Determination no C.O. or Unpwrd C.O Unit Combustion PowerNOM IFM FAN Motor Exhaust No P.E Type DISC. SizeWiring Diagrams Appendix IV. Wiring Diagram ListSize Voltage Control Power Catalog No 48TC-3SM Appendix V. Motormaster Sensor LocationsPreliminary Information Unit START-UP Checklist