Liebert XDC Pump OFF TD, Lead Pump, Lead Tandem, Dipswch, Valve Time, VLV ST Open, VLV Start TD

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Microprocessor Control

PUMP OFF TD

The user can set the amount of time a pump will remain off when refrigerant flow is interrupted or stops. After the time delay has expired, the control will try to restart the pump (see PUMP START TD).

LEAD PUMP

This allows the user to select which pump is the active pump. It can be set to PUMP 1 or PUMP 2. The control will operate the respective pump unless a loss of flow condition occurs. On a LOSS OF FLOW condition, the control will switch to the standby pump after the LOSS OF FLOW alarm time delay has elapsed and the LOSS OF FLOW alarm has been annunciated. The default is PUMP 1.

LEAD TANDEM

Not currently used.

DIPSWCH

This allows the user to read the eight-position DIP switch located on the control board. The switches are numbered according to the numbers on the DIP switch. The numeral 1 indicates the switch is ON and a 0 indicates the switch is OFF. These switches are factory-set and should not require any user changes.

Table 23 Liebert XDC DIP switches and factory settings

DIP Switch	Factory Setting
1	Off
2	Off
3	Off
4	Off
5	Off
6	Off = Standard, On = Dual Source
7	Off
8	Off

VALVE TIME

Valve travel time is not currently used.

VLV ST OPEN

Valve start open % is not currently used.

VLV START TD

Valve start time delay is not currently used.

MIN VLV SET

Minimum valve setpoint is not currently used.

COMP SEQ ON

When the Liebert XDC is started, this is the time delay before the next compressor comes on when the control is sequencing on compressors.

COMP OFF TD

This is how long a compressor must be off before the control will turn it back on.

INNERSTAGE TD

This is how long the control must wait between compressor stage changes during normal operation.

WSK1 TD

Compressor winter start kit time delay for all compressors.

WSK2 TD

The winter start kit 2 time delay is not currently used.

100% START TD

This is how long the control will keep the unit at 100% cooling during startup after all compressors have staged on.

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Contents Liebert XDC Example XDC160AA General Safety GuidelinesVoltage-phase-frequency Density system = 380/415-3ph-50Hz Table of Contents Specifications Alarm Descriptions and SolutionsFigures Tables Product Description General Product InformationEquipment Inspection Equipment HandlingRemoval of Skid Handling With SkidRemove tie-down brackets Positioning the Liebert XDC Liebert XDC dimensions, weightMechanical Considerations Removing Piano JacksLiebert XDC piping connection sizes Piping locationsPlacing the Liebert XDC on a Floor Stand Liebert XDC water/glycol piping connection Sizes Detail aTOP View of Floor Stand Positioning the Liebert XDC with Floor Stand Dimensions and clearances for Liebert XDC on floor standHigh Voltage Connections Connecting High-Voltage CablesElectrical enclosure knockout locations for field wiring Contactors Liebert XDC heat rejection connection points Extra Low Voltage ConnectionsField Connections-Air Cooled Units only Field Connections-All UnitsField Connections-Optional for All Units Extra Low Voltage field connections points Supply, return pipe sizes for Liebert XD refrigerant loop European Union Fluorinated Greenhouse Gas RequirementsRecommended Pipe Size Liebert XDC Interconnection With Liebert XD Cooling ModulePiping Mains Piping Installation MethodPiping Installation-R-134a Pumped Circuit Required Number Bypass Flow ControllersBypass flow controllers for a Liebert XDC-based system Liebert XDP Liebert XDC Evacuation and Leak Check-R-134a Pumped CircuitInsulation System refrigerant charge for the supply and return mains Filling the Pumped Circuit-R-134aWorksheet to calculate refrigerant charge Calculating Refrigerant Charge-ExampleCalculating refrigerant charge-example Double discharge riser layout Install Double Discharge RisersPage Installation data-Lee-Temp, one-circuit, four-fan model See for details on piping connections Piping Schematic Recommended refrigerant line sizes, DX R-407c, OD copper General arrangement air cooled Liebert XDC Lee-Temp ControlRecommended refrigerant line sizes for DCSL616 For mounting instructions, refer to Figure Lee-Temp Control Materials Supplied Lee-Temp PipingIndoor water/glycol cooled module R-407C refrigerant charge Filling the Direct Expansion DX Circuit-R-407cIndoor unit refrigerant charge-R-407c Outdoor air condenser charge-R-407cInstallation Checklist Indicator Lights Description Green Red Checklist for Liebert XDC StartupLiebert XDC pump light indicator Compressor Type 407c Compressor oil typesRefrigerant Type Liebert XDC system is now ready to be turned on User interface keypad functions Feature OverviewMicroprocessor Control DisplayMain Menu Feature OverviewViewing or Changing Settings ControlsHI AIR Temp Setpoint functions, default values and allowable rangesSetpoints MIN Temp SPTime Active AlarmsAlarm History StatusPump Start TD Setup OperationRestart DegreesDipswch Pump OFF TDLead Pump Lead TandemSetup Password Setpt PasswordCalibrate Sensors Alarm EnableCustom Alarms Alarm Time DelayCOM Alarm Enable Custom Text DiagnosticsAlarm Descriptions and Solutions Alarm DescriptionsRed and Green Lamp Indicators View Active Alarms Enable / Disable AlarmsAlarm Time Delays System Shutdown Causes View Alarm HistoryLiebert XDC troubleshooting TroubleshootingToo warm Air Cooled Condenser MaintenanceFluorinated Greenhouse Gas Requirements Shell and Tube Condensers Testing the Water Regulating Valve FunctionGlycol Solution Maintenance Water/Glycol Floor Stand CondenserLiebert XDC specifications SpecificationsPerformance Data Performance DataHeat Rejection Equipment Piping Connections204 Page That Ne tIti Ti n