Carrier 48TC*D08 appendix Configuration

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48TC

Field Service Test mode has the following changes from normal operation:

S Outdoor air temperature limits for cooling circuits, economizer, and heating are ignored.

S Normal compressor time guards and other staging delays are ignored.

S The status of Alarms (except Fire and Safety chain) is ignored but all alerts and alarms are still broadcasted on the network.

Field Service Test can be turned ON/OFF at the unit display or from the network. Once turned ON, other entries may be made with the display or through the network. To turn Field Service Test on, change the value of Test Mode to ON, to turn Field Service Test off, change the value of Test Mode to OFF.

NOTE: Service Test mode is password protected when accessing from the display. Depending on the unit model, factory-installed options, and field-installed accessories, some of the Field Service Test functions may not apply.

The independent outputs (IndpOutputs) submenu is used to change output status for the supply fan, economizer, and Power Exhaust. These independent outputs can operate simultaneously with other Field Service Test modes. All outputs return to normal operation when Field Service Test is turned off.

The Cooling submenu is used to change output status for the individual compressors and the dehumidification relay. Compressor starts are not staggered. The fans and heating service test outputs are reset to OFF for the cooling service test. Indoor fans and outdoor fans are controlled normally to maintain proper unit operation. All normal cooling alarms and alerts are functional.

NOTE: Circuit A is always operated with Circuit B due to outdoor fan control on Circuit A. Always test Circuit A first, and leave it on to test other Circuits.

The Heating submenu is used to change output status for the individual heat stages, gas or electric. The fans and cooling service test outputs are reset to OFF for the heating service test. All normal heating alarms and alerts are functional.

Configuration

The RTU-MP controller configuration points affect the unit operation and/or control. Review and understand the meaning and purpose of each configuration point before changing it from the factory default value. The submenus containing configuration points are as follows: Unit, Cooling, Heating, Inputs, Economizer, IAQ, Clock-Set, and User Password (USERPW). Each configuration point is described below under its according submenu. See RTU-MP Controls, Start-Up, Operation, and Troubleshooting Instructions (Form 48-50H-T-2T), Appendix for display tables.

Unit

Start Delay

This refers to the time delay the unit will wait after power up before it pursues any specific operation.

Factory Default = 5 sec Range = 0-600 sec

Filter Service Hours

This refers to the timer set for the Dirty Filter Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval.

Factory Default = 600 hr

NOTE: Setting this configuration timer to 0, disables the alarm.

Supply Fan Service Hours

This refers to the timer set for the Supply Fan Runtime Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval.

Factory Default = 0 hr

NOTE: Setting this configuration timer to 0, disables the alarm.

Compressor1 Service Hours

This refers to the timer set for the Compressor 1 Runtime Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next

maintenance interval.

Factory Default = 0 hr

NOTE: Setting this configuration timer to 0, disables the alarm.

Compressor2 Service Hours

This refers to the timer set for the Compressor 2 Runtime Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm rest screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval

Factory Default = 0 hr

NOTE: Setting this configuration timer to 0, disables the alarm.

Cooling

Number of Compressor Stages

This refers to the number of mechanical cooling stages available on a specific unit. Set this point to “One Stage” if there is one compressor in the specific unit, set to “Two Stage” if there are two compressors in the unit, and set to “None” if economizer cooling ONLY is desired.

Factory Default = One Stage for 1 compressor units Two Stage for 2 compressor units

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Contents Table of Contents Safety ConsiderationsUnit Arrangement and Access GeneralWhat to do if you smell gas Routine Maintenance Seasonal MaintenanceSupply FAN Blower Section Supply Fan Belt-DriveManual Outside Air Hood Screen Adjustable-Pitch Pulley on Motor Supply-Fan Pulley Adjustment BearingsCoil Maintenance and Cleaning Recommendation Periodic Clean Water RinseCooling Condenser CoilRoutine Cleaning of Novation Condenser Coil Surfaces Routine Cleaning of Evaporator Coil SufacesRefrigerant System Pressure Access Ports Puronr R-410A RefrigerantRefrigerant Charge Seatcore Cooling Charging Charts Cooling Charging Charts D08Cooling Charging Charts D12 Cooling Charging Charts D14 Circuit a Cooling Charging Charts D14 Circuit B Cooling Service Analysis Problem Cause RemedyCondenser-Fan Adjustment D08-D12 size Condenser-Fan Adjustment D14 sizeTroubleshooting Cooling System CompressorsNon-Powered Type Unit-Powered TypeConvenience Outlets Duty CycleSmoke Detectors Smoke Detector Locations Typical Supply Air Smoke Detector Sensor LocationCompleting Installation of Return Air Smoke Sensor Fiop Smoke Detector Wiring and ResponseSensor Alarm Test Sensor Alarm Test ProcedureController Alarm Test Sensor and Controller TestsController Alarm Test Procedure Dirty Controller Test ProcedureDirty Sensor Test Procedure To Configure the Dirty Sensor Test OperationDetector Cleaning SD-TRK4 Remote Alarm Test ProcedureRemote Test/Reset Station Dirty Sensor Test Dirty Sensor Test Using an SD-TRK4Troubleshooting Protective Devices Compressor ProtectionGAS Heating System Control CircuitFuel Types and Pressures Flue Gas Passageways Combustion-Air BlowerBurners and Igniters Main BurnersCleaning and Adjustment Check Unit Operation and Make Necessary AdjustmentsLimit Switch LED Error Code Description LED Indication Error Code DescriptionBurner Ignition Orifice Replacement Gas ValveIntegrated Gas Control IGC Board IGC Connections OutputsOrifice Sizes Altitude CompensationOrifice Carrier Drill Drill Size Part Number ElevationTroubleshooting Heating System Minimum Heating Entering Air TemperatureHeating Service Analysis Problem Cause RemedyIGC Board LED Alarm Codes IGCCondenser Coil Service Repairing Novation Condenser Tube LeaksReplacing Novation Condenser Coil PREMIERLINKt Control Typical PremierLinkt System Control Wiring Diagram 55 Space Temperature Sensor Wiring Temp ResistanceSpace Sensor Mode TB1 Terminal Field Connection Input SignalPremierLink Sensor Usage Thermostat Mode 56 Internal ConnectionsLctb Indoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection Signal Type CCN BUS Wire CCN Plug PIN Color Number RTU-MP Control SystemRecommended Cables Color Code RecommendationsRTU-MP Multi-Protocol Control Board Typical RTU-MP System Control Wiring Diagram Configurable Inputs RTU-MP Controller Inputs and OutputsPoint Name Type of I/O Connection PIN Name Numbers InputsSpace Temperature SPT Sensors RTU-MP T-55 Sensor ConnectionsRTU-MP / Indoor CO2 Sensor 33ZCSENCO2 Connections Connecting Discrete Inputs Power Exhaust outputCommunication Wiring Protocols RTU-MP Troubleshooting BACview6 Handheld Connections LEDsTroubleshooting Alarms Alarms BACnet MS/TPModule Status Report Modstat Example Basic Protocol Troubleshooting ModbusManufacture Date Code Name MeaningECONOMI$ER Systems EconoMi$er IV Component LocationsEconoMi$er IV Wiring EconoMi$er EconoMi$er IV Input/Output LogicInputs Outputs Supply Air Temperature SAT Sensor Outdoor Air Lockout SensorEconoMi$er IV Control Modes Outdoor Dry Bulb ChangeoverDifferential Dry Bulb Control Outdoor Enthalpy ChangeoverExhaust Setpoint Adjustment Indoor Air Quality IAQ Sensor InputMinimum Position Control Damper Movement ThermostatsDemand Control Ventilation DCV CO2 Sensor Configuration CO2 Sensor Standard SettingsAnalog CO2 DCV Demand Controlled Ventilation and Power Exhaust EconoMi$er IV Sensor UsageEconoMi$er IV Preparation Differential EnthalpyWiring Diagrams EconoMi$er IV Troubleshooting CompletionDCV 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 PRE-START-UP START-UP, GeneralUnit Preparation Gas PipingInternal Wiring Refrigerant Service PortsReturn-Air Filters Outdoor-Air Inlet ScreensField Service Test START-UP, RTU-MP ControlVentilation Continuous Fan Perform System Check-OutConfiguration Cooling/Econ SAT Low Setpt Cooling Lockout TempHeating Heating SAT High Setpt Heating Lockout TempPower Exhaust Setpt T55/56 Override DurationIAQ Low Reference @ 4mA IAQ High Reference @ 20mAOperating Sequences Supplemental Controls PremierLinkt Control48TC 48TC Available Cooling Stages Number Stages Economizer48TC 48TC Rooftop Mode Value Linkage Mode Linkage ModesLoadshed Command Gas and Electric Heat Units Always Occupied Default OccupancyRTU-MP Sequence of Operation SchedulingBACnet Schedule BAS On/OffDI On/Off Indoor FanPower Exhaust Fastener Torque ValuesEconomizer Indoor Air QualityTorque Values Appendix I. Model Number Significance Model Number NomenclatureSerial Number Format Position Number Typical DesignatesAppendix II. Physical Data Physical Data12.5TONS Heat Anticipator Setting Amps Physical Data Heating 12.5TONS48TC**08 48TC**12 48TC**14 Gas Connection Natural Gas Heat, Liquid Propane HeatAppendix III. FAN Performance CFM RPM BHPFAN Performance 57948TC**14 RPM BHPPulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboElectrical Information Unit Combustion Power MCA/MOCP Determination no C.O. or Unpwrd C.ONOM IFM FAN Motor Exhaust No P.E Type DISC. SizeAppendix IV. Wiring Diagram List Wiring DiagramsSize Voltage Control Power Appendix V. Motormaster Sensor Locations Catalog No 48TC-3SMUnit START-UP Checklist Preliminary Information
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