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Trane WC-IOM-7 manual ReliaTel Refrigeration Module RTRM Default Chart, Troubleshooting

Models: WC-IOM-7

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Troubleshooting

4.Verify all modes of operation, by running the unit through all of the steps in the “Test Modes” section discussed in “Unit Start-Up”.

5.After verifying proper unit operation, exit the test mode. Turn the fan on continuously at the ZSM, by pressing the button with the fan symbol. If the fan comes on and runs continuously, the ZSM is good. If you are not able to turn the fan on, the ZSM is defective.\

Table 9.	System mode and fan selection chart

Resistance Valves		Zone Sensor		Local Fan
(Ohms)		Unit/Fan Mode	Local Unit Mode	Mode

2.32K		Off/ Auto	Off	Auto

4.87K		Cool/Auto	Cool	Auto

7.68K		Auto/Auto	Auto	Auto

10.77K		Off/On	Off	On

13.32K		Cool/On	Cool	On

16.13K		Auto/On	Auto	On

19.48K		Heat/Auto	Heat	Auto

27.93K		Heat/On	Heat	On

35.0K		Emergency Heat/Auto	Emergency Heat	Auto

43.45K		Emergency Heat/On	Emergency Heat	On

Out of Range (Short)		INVALID/Short	Invalid (CV), Auto (VAV)	Invalid

Out of Range (Open)		INVALID/Open	Invalid (CV), Off (VAV)	Invalid

ReliaTel Refrigeration Module (RTRM) Default Chart

If the RTCI loses input from the building management system, the RTRM will control in the default mode after approximately 15 minutes. If the RTRM loses the Heating and Cooling setpoint input, the RTRM will control in the default mode instantaneously. The temperature sensing thermistor in the Zone Sensor Module is the only component required for the “Default Mode” to operate.

Unit Operation without a Zone Sensor

This procedure is for temporary operation only. The economizer and condenser fan cycling functions are disabled.

1.Open and Lock the unit disconnect switch.

2.Remove the Outside Air Sensor (OAS) from the condenser section of unit.

3.Use two (2) wire nuts, to individually cap the wires.

4.Locate the RTRM (J6). Connect two (2) wires to terminals J6-1 and 2.

5.Connect the sensor (OAS) using two wire nuts to the two (2) field supplied wires that were connected to terminals 1 and 2 on J6.

54	Packaged Heat Pump • WC-IOM-7

Image 54

Trane WC-IOM-7 ReliaTel Refrigeration Module RTRM Default Chart, Unit Operation without a Zone Sensor, Troubleshooting

Contents

Installation Operation Maintenance DecemberModel Number Packaged Heat PumpWarnings and Cautions Model Number DescriptionEquipment Damage From Ultraviolet UV Lights Contains RefrigerantHazardous Voltage w/Capacitors WC-IOM-7 Packaged Heat PumpContents ContentsContents Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 WCZ, WCY, WCX, WCC, WCD, WCH, WCM, WCP and WSC Parts Only. . . . 57 Models Less Than 20 Tons for Commercial Use*. . . . . . . . . . . . . . . . . . . . . . 57 Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Standard Equipment Warranty Terms and Conditions. . . . . . . . . . . . . . . . . . 58 Commercial Equipment Warranty and Liability . . . . . . . . . . . . . . . . . . . . . . . 58 Models Larger that 20 Tons for Commercial Use*Digit Service digitModel Number Description Minor design sequenceCompressor Nameplate General InformationUnit Nameplate Unit DescriptionGeneral Information Clogged Filter Switch OptionalSystem Input Devices & Functions RTOM - ReliaTel Options Module OptionalLow Pressure Control Compressor Disable CPR1/2Power Exhaust Control Optional High Pressure Control OptionalZone Sensor Module ZSM BAYSENS009B Lead/Lag Control Dual Circuit OnlyZone Sensor Module ZSM BAYSENS007B Zone Sensor BAYSENS011BRemote Zone Sensor BAYSENS016A Remote Zone Sensor BAYSENS013CRemote Zone Sensor BAYSENS014C Remote Zone Sensor BAYSENS017BUnit Inspection Smoke Detector Sensor OptionalGeneral Information First Aid Measures Precautionary MeasuresFiberglass Wool StorageUnit Clearances General InformationUnit Dimensions WC-IOM-7 Packaged Heat PumpUnit Dimensions Packaged Heat Pump WC-IOM-7Unit Dimensions Figure 4. Unit Dimensional Data 20 TonFigure 5. Roofcurb Dimensional Data 20 Ton WC-IOM-7 Packaged Heat PumpFigure 7. Horizontal Duct Dimensional Data 20 Ton Unit DimensionsPackaged Heat Pump WC-IOM-7 Improper Unit Lift Typical weights and point loading dataHeavy Objects Figure 8. Rigging and center of gravity dataRigging Unit DimensionsFoundation InstallationIf a Curb Accessory Kit is not used General Unit RequirementsMain Electrical Power Requirements InstallationFactory Installed Economizer Low Voltage Wiring AC & DC RequirementsField Installed Power Wiring Condensate Drain ConfigurationFilter Installation Figure 9. Condensate Trap InstallationOptional TBUE Wiring Main Unit PowerStandard Wiring NOTICE Use Copper Conductors OnlyHazardous Voltage Field Installed Control WiringControl Power Transformer InstallationControls using 24 VAC InstallationPackaged Heat Pump WC-IOM-7 Table 3. DC Conductors Zone Sensor Module wiring InstallationRTRM Smoke Detector Customer Low Voltage Wiring Figure 12. Smoke detector wiringInstallation Installation WC-IOM-7 Packaged Heat PumpSpace Temperature Averaging InstallationPackaged Heat Pump WC-IOM-7 Hazardous Voltage Table 4. Temperature vs. ResistanceInstallation TemperatureVoltage Imbalance InstallationCompressor Crankcase Heaters Optional Electrical Phasing Three Phase MotorsLive Electrical Components InstallationLive Electrical Components ReliaTel ControlsInstallation Packaged Heat Pump WC-IOM-7Service test guide for component operation Pre-StartTest Modes Units with Belt Drive Indoor Fan Pre-StartVerifying Proper Air Flow ReliaTel ControlReturn Air Smoke Detector Pre-StartRotating Components Start UpEconomizer Start-Up Compressor Start-UpStart Up Heating Start-UpScroll Compressors Final System Setup Start UpMaintenance Fan Belt Adjustment - Belt Drive UnitsRotating Components value shown in Table MaintenanceMonthly Maintenance Belt tension measurement and deflection rangesFilters Return Air Smoke Detector MaintenanceCooling Season MaintenanceCoil Cleaning Heating SeasonMaintenance Hazardous Pressures Final ProcessMaintenance Sample maintenance log MaintenanceTroubleshooting Hazardous Service ProceduresReliaTel Control Method TroubleshootingSystem Status Checkout Procedure LED 1 SystemSystem Failure LED 4 ServiceService Failure MethodCool Failure Resetting Cooling and Heating LockoutsHeat Failure TroubleshootingFan Failure Switch Zone Temperature Sensor ZTS Service IndicatorClogged Filter Switch TroubleshootingTest Zone Temperature Sensor ZTS TestTest Zone Temperature Thermistor ZTEMP Cooling Set Point CSP and Heating Set Point HSPProgrammable & Digital Zone Sensor Test LED Indicator Test, SYS ON, HEAT, COOL & SERVICETesting serial communication voltage Test System Mode and Fan SelectionUnit Operation without a Zone Sensor ReliaTel Refrigeration Module RTRM Default ChartSystem mode and fan selection chart TroubleshootingUnit Economizer Control ECA Troubleshooting TroubleshootingReliaTel Control Number Wiring DiagramsDrawing DescriptionWarranty Heat PumpModels Less Than 20 Tons for Commercial Use Commercial Equipment Warranty and Liability WarrantyStandard Equipment Warranty Terms and Conditions Models Larger that 20 Tons for Commercial UsePage Date Literature Order NumberWC-IOM-7 12/04