Manuals / Trane / Household Appliance / Air Conditioner

Trane LO manual Terminal Unit Control TUC

Models: LO

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Terminal Unit

Control (TUC)

Table 39. Autocycle Test Staging

Stage	LEDs (1)				Fan-Coil Output Exercised
	1	2	3	4
0					Off
1				λ	Fan low speed
2			λ		Fan medium speed
3			λ	λ	Fan high speed
4	ϒ λ				Economizer/damper
5	ϒ λ		ϒ λ		Cooling valve
6	ϒ λ		λ	ϒ	Heating valve
7	ϒ λ		λ	λ	Electric heat stage 1
8	λ ϒ		ϒ	ϒ	Electric heat stage 2
9	λ ϒ		ϒ	λ	Not used
10	λ ϒ		λ	ϒ	Reheat
11	λ	ϒ	λ	λ	Not used
12	λ λ		ϒ	ϒ	Not used
13	λ	λ	ϒ	λ	Not used
14	λ	λ	λ	ϒ	Not used
15					Not used

(1)λ = the LED is illuminated ϒ= the LED is off

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UNT-IOM-6

Page 100

Image 100

Trane LO manual Terminal Unit Control TUC

Contents

UniTrane Fan-CoilRoom Conditioners Force Flo Cabinet Heaters SizesLow Vertical Fan-Coils Sizes UNT-IOM-6Table of Contents General Information Cabinet Styles Model AModel C Model EModel H Model KModel M Model Jdetailed explanation of the Model Number Descriptionmodel number Model Number Description UNT-IOM-6UNT-IOM-6 Receiving and Handling UNT-IOM-6Jobsite Storage UNT-IOM-6Installation Considerations ο1. Clearancesο2. Structural Support ο3. LevelService Access Vertical or Low VerticalConcealed or Vertical Vertical or LowInstallation Checklist ο ο ο Installing the Unit Vertical UnitsCAUTION: All unit panels and filters must be in Horizontal Unitsfilters in place may cause motor overload Table 1. Unit Operating Weights, pounds kg UnitCabinet ConcealedRecessed units Cabinet unitsUNT-IOM-6 Figure 5. Trim ring assembly installation UNT-IOM-6Startup Checklist External Insulating RequirementsPiping Units with Hydronic Coil Connections OnlyPiping Considerations Connecting field piping to coilUnits with Steam Coils UNT-IOM-6UNT-IOM-6 Connecting Water Piping to Factory Piping Package Factory Piping Package ConnectionsPiping Considerations Installing the Auxiliary Drain Pan Connecting the Condensate DrainAutomatic Changeover Sensor Condensate Overflow Detection DeviceUNT-IOM-6 Automatic Electric Heat Lockout Switch Fan-coil Venting the Hydronic Coil UNT-IOM-6Balancing The Manual Circuit Setter Valve If the piping package has modulating valvesUNT-IOM-6 Balancing The Auto- matic Circuit Setter Valve Table 2. Automatic Circuit Setter Flow Rate RangeValve gpm Pressure Drop Range psigDuct Connections Ductwork RecommendationsSupply Power Wiring Electrical Connections·Vertical cabinet & recessed units ·Vertical concealed & all horizontal units1. Power & ground inside of control box Control Interconnection Wiring Electrical Grounding Restrictions Wall MountedTable 3. Maximum Wiring Distances, ft m Wire Size RangeInstalling Wall Mounted Controls Fan Mode Switch InstallationZone Sensor Installation UNT-IOM-6Figure 25. Wall mounted zone sensor dimensions UNT-IOM-6Wall mounted zone sensor Model # Digit 31 = W Split-mountedoptionManual Fan Mode Switch Fan Mode SwitchSequence of Operations Tracer ZN.010 and ZN.510 Tracer ZN.010 and ZN.510Sequence of Operations Power-UpSequence Operating InformationEntering Water Temperature Sampling Function Tracer ZN.010 and ZN.510Binary Inputs BIP1: Low Temperature Detection OptionBIP2: Condensate Overflow Detection Option BIP3: Occupancy SensorBinary Outputs Tracer ZN.010 and ZN.510Table 5. Occupancy Sensor State Table Sensor TypeZone Sensors Fan Mode Switch Analog InputsTracer ZN.010 and ZN.510 Table 7. Analog Inputs AvailableSupply Fan Operation Default SettingTracer ZN.010 and ZN.510 Table 8. Fan Mode OperationTroubleshooting Red Service LEDLED Activity Table 10. Red Service LED ActivityYellow COMM LED Green STATUS LEDTracer ZN.010 and ZN.510 Table 11. Green STATUS LED ActivityManual Output Test Manual Output Test ProcedureTracer ZN.010 and ZN.510 Tracer ZN.010 and ZN.510 StepsCool Output Heat OutputDiagnostics Table 14. Controller DiagnosticsDiagnostic Tracer ZN.010 and ZN.510Resetting Diagnostics Automatic Reset by the ControllerCycling Power to the Controller Manual Output TestTracer ZN.010 and ZN.510 Trane’s Service Tool, Rover Alarm ResetUNT-IOM-6 Troubleshooting Tracer ZN.010 and ZN.510Table 15. Fan Outputs do not Energize Probable CauseTracer ZN.010 and ZN.510 Table 16. Valves Stay ClosedProbable Cause ExplanationTracer ZN.010 and ZN.510 Table 17. Valves Stay OpenProbable Cause ExplanationTracer ZN.010 and ZN.510 Table 18. Electric Heat Not OperatingProbable Cause ExplanationTracer ZN.010 and ZN.510 Table 19. Fresh Air Damper Stays ClosedProbable Cause ExplanationTracer ZN.010 and ZN.510 Table 20. Fresh Air Damper Stays OpenProbable Cause ExplanationTracer Summit Communication Wiring Tracer ZN.520Tracer ZN.520 Sequence of OperationsService Communication Wiring Wall Mounted Zone Sensor ModuleZone Sensors Without Interconnecting Wiring Tracer ZN.520Tracer ZN.520 Sequence of Operation Tracer ZN.520 Unit Start-Up Tracer CommunicationsTracer ZN.520 Tracer ZN.520 OccupiedUnoccupied Mode Occupied Standby ModeOccupied Bypass Mode Tracer ZN.520Occupancy Sources Cooling Operation Tracer Summit With Supply Fan ControlTracer ZN.520 Tracer ZN.520 Heating OperationDischarge Air Tempering Fan Mode Operation Tracer ZN.520Table 21. Fan Configuration Fan speed defaultTable 23. Local fan switch enabled Fan switch localContinuous Fan Operation Fan Cycling Operation Tracer ZN.520Fan Off Delay HeatingEntering Water Temperature Sampling Function Tracer ZN.520Fan Start on High Speed Heating or Cooling RequiredFresh Air Damper Options Tracer ZN.520Electric Heat Operation ManualTracer ZN.520 Economizer Damperand Damper Position Outdoor Air TempData Sharing Tracer ZN.520Dehumidification Binary InputsTable 26. Binary Input Configurations ConfigurationTracer ZN.520 BinaryTable 27. Binary Output Configuration ConfigurationTracer ZN.520 Binary OutputsTracer ZN.520 Analog Inputs Table 28. Analog InputsDescription TerminalsZone Sensor External Setpoint AdjustmentTracer ZN.520 Space Temperature MeasurementTracer ZN.520 Fan Switch On/Cancel ButtonsUNT-IOM-6 Communications Table 29. Zone sensor wiring connectionsTracer ZN.520 TB1 DescriptionDiagnostics Table 30. Tracer ZN.520 DiagnosticsDiagnostic Tracer ZN.520Resetting Diagnostics Translating Multiple DiagnosticsTracer ZN.520 Tracer ZN.520 UNT-IOM-6LED Operation Table 31. Red Service LED ActivityRed Service LED Tracer ZN.520Troubleshooting Tracer ZN.520Green Status LED Yellow Comm LED Table 32. Green Status LED activityTracer ZN.520 Manual Output TestLED Operation Test Sequence Table 34. Test SequenceTroubleshooting Tracer ZN.520Table 35. Fan outputs do not energize Probable CauseTracer ZN.520 Table 36. Valves Stay ClosedProbable Cause ExplanationTerminal Unit Control TUC TUC Sequence of OperationsTracer Communication Wiring Terminal Unit Control TUCService Communication Wiring Wall-Mounted Zone Sensor ModuleTerminal Unit Controller Start-Up Zone sensors without interconnecting wiringTUC Human Interface Terminal Unit Control TUCDIP Switch Position DIP Switch PositionTerminal Unit Control TUC Table 37. Valid TUC AddressesTUC Sequence of Operation Cooling and Heating OperationSetpoint Control Terminal Unit Control TUCTerminal Unit Control TUC Fan Mode OperationOff Position High, Medium, or Low Postion2-Pipewith Auxiliary Electric Heat Fan-coils Terminal Unit Control TUCEntering Water Temperature Sampling Function Unit TypeManual Auto 2-Position EconomizerTerminal Unit Control TUC Fresh Air Damper OptionsTerminal Unit Control TUC UNT-IOM-6BIP3: Condensate Overflow Detection Device BIP4 Low Temperature Detection OptionUNT-IOM-6 BIP4: Smoke Input BIP3: Occupied/ Unoccupied Mode BIP1: External InterlockTerminal Unit Control TUC UNT-IOM-6BIP2 Motion Detection Autocycle Test Terminal Unit Control TUCTerminal Unit Control TUC Reading Diagnostics ϒ ϒ ϒ ϒ λ ϒ ϒ ϒ λ ϒ λ λTerminal Unit Control TUC SequenceReading the Operating Machine State Terminal Unit Control TUCTerminal Unit Control TUC ϒ ϒ ϒ ϒ ϒ ϒ ϒ λReading the Operating Control Mode Terminal Unit Control TUCTerminal Unit Control TUC ϒ ϒ ϒ ϒ ϒ ϒ ϒ ϒ ϒ ϒ λ ϒTerminal Unit Control TUC ϒ ϒ ϒ ϒUsing the Zone Sensor Using EverywareSoftware DiagnosticsResetting Diagnostics Table 43. TUC Controller DiagnosticsCycling Power to the TUC Using Tracer 100i or 100L Using Tracer SummitUnit Mode Listed as Standby Terminal Unit Control TUCTroubleshooting Terminal Unit Control TUCTable 44. TUC Does Not Communicate Probable CauseTerminal Unit Control TUC Table 45-Continued.Fan Outputs not EnergizingProbable Cause ExplanationTerminal Unit Control TUC Table 46—Continued.Valves ClosedProbable Cause ExplanationTerminal Unit Control TUC Table 48. Electric Heat Not OperatingProbable Cause ExplanationTerminal Unit Control TUC Table 49. Fresh Air Damper ClosedProbable Cause ExplanationTerminal Unit Control TUC Table 50. Fresh Air Damper OpenProbable Cause ExplanationProbable Cause Table 52. Zone Temperature Too CoolExplanation Maintenance Periodic Maintenance ChecklistMaintenance Procedures FiltersMain Filter Unit sizeFresh Air Filter Inspecting and Cleaning Drain Pans Auxiliary Drain Pan Main Drain PanHorizontal units Winterizing the CoilVertical units Inspecting and Cleaning Coils Steam and Water CoilsVolume Piping PackageUnit Size Total # Rows1.Disconnect all electrical power to the unit Inspecting and Cleaning the Fan UNT-IOM-6 Fan Board Assembly Removal Replacing the MotorVertical Units Horizontal UnitsControl Device Replacement Table 56. Trouble ShootingProblem Possible CauseAppendix Factory Piping PackagesFan Mode Switch Typical Wiring Diagram For reference onlyTracer ZN.010 Typical Wiring Diagram For Reference OnlyFor Reference Only Tracer ZN.010 Typical Wiring DiagramElectric heat contactor For Reference Only Tracer ZN.010 Typical Wiring DiagramFour-pipe Two-positionN/C cooling control valve TUC Typical Wiring Diagram For Reference OnlyFor Reference Only TUC Typical Wiring DiagramUNT-IOM-6 Page The Trane Company An American Standard CompanyLiterature Order Number UNT-IOM-6