Carrier 48TCA04---A12 appendix Inputs, Space Sensor Type, Input 1 Function, Input 2 Function

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48TC

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

T55/56 Override Duration

This sets the occupancy override duration when the override button is pushed on the space sensor.

Factory Default = 1 hr Range = 0-24 hr

IAQ Low Reference @ 4mA

This is used when an IAQ sensor is installed on Input 1 or

2.This value is displayed and used when 4mA is seen at the input.

Factory Default = 0 PPM

Range = 0-400 PPM

IAQ High Reference @ 20mA

This is used when an IAQ sensor is installed on Input 1 or

2.This value is displayed and used when 20mA is seen at the input.

Factory Default = 2000 PPM Range = 0-5000 PPM

NOTE: IAQ low Reference @ 4mA and IAQ High Reference @ 20mA are used to set the linear curve of mA vs. PPM.

OAQ Low Reference @ 4mA

This is used when an OAQ sensor is installed on Input 1 or 2. This value is displayed and used when 4mA is seen at the input.

Factory Default = 0 PPM Range = 0-400 PPM

OAQ High Reference @ 20mA

This is used when an OAQ sensor is installed on Input 1 or 2. This value is displayed and used when 20mA is seen at the input.

Factory Default = 2000 PPM Range = 0-5000 PPM

NOTE: OAQ low Reference @ 4mA and OAQ High Reference @ 20mA are used to set the linear curve of mA vs. PPM.

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Contents Table of Contents Safety ConsiderationsGeneral Unit Arrangement and AccessRoutine Maintenance What to do if you smell gasSeasonal Maintenance Supply FAN Blower Section Supply Fan Belt-DriveCooling Condenser Coil Maintenance and Cleaning RecommendationCondenser Coil Remove Surface Loaded Fibers Periodic Clean Water RinseRoutine Cleaning of Coil Surfaces One-Row CoilEvaporator Coil Refrigerant System Pressure Access PortsCleaning the Evaporator Coil Evaporator Coil Metering DevicesRefrigerant Charge To Use Cooling Charging ChartsPuronr R-410A Refrigerant No ChargeCooling Charging Charts Size Designation Nominal Tons ReferenceCooling Charging Charts C08229 C08437 C08438 C08439 Cooling Service Analysis Problem Cause RemedyConvenience Outlets Condenser-Fan AdjustmentTroubleshooting Cooling System CompressorController Smoke DetectorsSystem Unit Connect Primary TransformerSensor Smoke Detector LocationsCompleting Installation of Return Air Smoke Sensor Fiop Smoke Detector Wiring and ResponseController Alarm Test Sensor Alarm TestSensor Alarm Test Procedure Sensor and Controller TestsDirty Sensor Test Procedure Controller Alarm Test ProcedureDirty Controller Test Procedure To Configure the Dirty Sensor Test OperationDetector Cleaning Troubleshooting Compressor Protection Protective DevicesGAS Heating System Relief DeviceNatural Gas Manifold Pressure Ranges Fuel Types and PressuresNatural Gas Supply Line Pressure Ranges Liquid Propane Supply Line Pressure RangesFlue Gas Passageways Combustion-Air BlowerBurners and Igniters Cleaning and AdjustmentCheck Unit Operation and Make Necessary Adjust- ments Main BurnersLimit Switch Burner IgnitionLED Error Code Description Orifice ReplacementLED Indication Error Code Description Red LED-Status IGC Connections Orifice SizesCont. Altitude Compensation* A08-A12 Altitude Compensation* A04-A07LP Orifice Minimum heating entering air temperature Troubleshooting Heating SystemAltitude Compensation* A04-A06 Low NOx Units Heating Service Analysis Problem Cause RemedyIGC Board LED Alarm Codes IGCPremierlinkt Control PremierLink ControllerPremierLink Wiring Schematic 55 Space Temperature Sensor Wiring Space Sensor Mode PremierLink Sensor UsageThermostat Mode 56 Internal ConnectionsLctb Indoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection Recommended Cables RTU-MP Control SystemColor Code Recommendations RTU-MP Multi-Protocol Control Board RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs OutputsSpace Temperature SPT Sensors RTU-MP T-55 Sensor ConnectionsIAQ Sensor SEN J4-2 COM J4-3 24 VAC Power Exhaust output Connecting Discrete InputsCommunication Wiring Protocols RTU-MP Troubleshooting LEDs LEDs on the RTU-MP show the status of certain functionsTroubleshooting Alarms Alarms BACnet MS/TPRTU-MP Driver Manufacture Date Basic Protocol TroubleshootingModbus Code Name MeaningEconomizer Systems EconoMi$er IV Component LocationsEconoMi$er IV Wiring EconoMi$er EconoMi$er IV Input/Output LogicEconoMi$er IV Control Modes Supply Air Temperature SAT SensorOutdoor Air Lockout Sensor Outdoor Dry Bulb ChangeoverReturn Air Temperature or Enthalpy Sensor Mounting Location Outdoor Enthalpy ChangeoverIndoor Air Quality IAQ Sensor Input Exhaust Setpoint AdjustmentMinimum Position Control Occupancy Control Damper MovementThermostats Demand Control Ventilation DCVEconoMi$er IV Preparation CO2 Sensor ConfigurationEconoMi$er IV Sensor Usage Differential EnthalpyWiring Diagrams 48TC Typical Unit Wiring Diagram Power A06, 208/230-3-60 48TC Unit Wiring Diagram Control A06 PRE-START-UP START-UP, GeneralHeating CoolingMain Burners Ventilation Continuous FanSTART-UP, RTU-MP Control Field Service TestSTART-UP, Premierlink Controls Perform System Check-OutConfiguration Space Sensor Type InputsInput Input 1 FunctionHeating, Units Without Economizer Operating SequencesBase Unit Controls Cooling, Units Without Economizer Cooling, Unit With EconoMi$erHeating With EconoMi$er PremierLink Control48TC Available Cooling Stages OAT ≤ SPT 48TC 48TC Linkage Modes Loadshed Command Gas and Electric Heat UnitsRTU-MP Sequence of Operation SchedulingBACnet Schedule Always Occupied Default OccupancyLocal Schedule BAS On/OffEconomizer Power ExhaustIndoor Air Quality Demand Limit Fastener Torque ValuesTorque Values Serial Number Format Appendix I. Model Number SignificanceModel Number Nomenclature Position NumberAppendix II. Physical Data Physical Data Cooling TonsPhysical Data Cooling 48TC*A08 48TC*A09 48TC*A12Physical Data Heating LOW Appendix III. FAN Performance General Fan Performance NotesTon Vertical Supply Ton Horizontal SupplyCFM RPM BHP Medium Static Option High Static Option 48TC**05 Phase Ton Horizontal Supply 48TC**051506 48TC**05 Phase Ton Vertical Supply1493 148648TC**06 148248TC**06 Phase Ton Horizontal Supply 48TC**06 Phase Ton Vertical SupplyPhase Ton Horizontal Supply 48TC**071103 1143 11071124 1122 11621116 4971099 1093 11331247 5791263 1273Pulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboRange RLA LRA Appendix IV. Electrical DataIFM TypeAppendix IV. Electrical Data FLARLA LRA IFM RangeEFF at FullFAN Motor Exhaust Combustion PowerNOM IFM No P.E Type DISC. SizeUnbalanced 3-Phase Supply Voltage NOMAppendix V. Wiring Diagram List Wiring DiagramsAppendix VI. Motormaster Sensor Locations 48TC*A04 Outdoor Circuiting48TC*A09/12 Outdoor Circuiting Catalog No 48TC---2SMUnit START-UP Checklist Preliminary Information

48TCA04---A12 specifications

The Carrier 48TCA04---A12 is a high-efficiency rooftop air conditioning unit designed for commercial and industrial applications. Known for its reliability and performance, this model features advanced technologies that cater to diverse climate control needs.

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To sum up, the Carrier 48TCA04---A12 rooftop air conditioning unit stands out due to its exceptional energy efficiency, durable construction, advanced technology, and quiet operation, making it a reliable choice for commercial and industrial cooling solutions. Its flexibility and smart technology integrations ensure that it meets a wide range of climate control requirements effectively.
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