Liebert XDC Filling the Direct Expansion DX Circuit-R-407c, Indoor unit refrigerant charge-R-407c

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Piping and Filling with Refrigerant: R-134a and R-407c Circuits

2.7Filling the Direct Expansion (DX) Circuit—R-407c

NOTE

If necessary, refer to 3.0 - Installation Checklist to ensure that the system has been properly checked out and is ready to be filled with coolant.

Any recommended volumes will be approximate. The user must verify that all circuits of the system have been adequately filled.

For Air Cooled Lee-Temp / Flood Back Head Pressure Control Units Only

NOTE

Proper safety equipment and proper refrigeration tools are required. Check unit nameplate for correct refrigerant type before topping off or recharging a system.

NOTE

Refrigerant R-407c is a blend of three components, and must be introduced and charged from the cylinder only as a liquid.

Refrigerant R-407c uses a POE (polyolester) lubricant. Do not open the compressor unit piping to the atmosphere for more than 15 minutes. The compressors contain POE oil that is very hygroscopic; it quickly absorbs water from the atmosphere. The longer the compressor piping is left open to the atmosphere, the harder it will be to fully evacuate. If left open too long, the POE oil may need to be replaced before achieving the required vacuum level.

1.Make sure the Liebert XDC is Off.

2.Connect the refrigerant gauge charging hose to the refrigerant drum and to the receiver at the rotalock valve and/or to the Schrader valves on the liquid lines.

3.Weigh in the calculated charge based on Tables 14, 15, 16 and 17—values are maximum, based on outdoor air temperature of -30°F (-34°C).

4.Open the rotalock valve and fill the complete calculated charge.

Table 14 Indoor unit refrigerant charge—R-407c

Model 50/60 Hz

Charge/Circuit, lb. (kg)

 

 

Liebert XDC160

17.5 (8.0)

 

 

Table 15 Outdoor air condenser charge—R-407c

Outdoor Ambient, °F (°C

Model 50/60 Hz

Charge / Circuit, lb (kg)

-30 to 95 (-34 to 35)

CDL830 or CSL415

200 (90.8)

 

 

 

-30 to 100 (-34 to 38)

CDL830 or CSL415

200 (90.8)

 

 

 

-30 to 105 (-34 to 41)

CSL616

254 (115.2)

 

 

 

35 to 105 (2 to 41)

CSL616

164 (74.5)

 

 

 

Table 16 Air cooled systems - liquid line charge - R-407c refrigerant per 100 ft (30 m) of Type "L" copper tube

O.D., inches

Liquid Line, lb (kg)

Hot Gas Line, lb (kg)

3/8

3.7

(1.7)

-

1/2

6.9

(3.1)

-

5/8

11.0 (5.0

2.2 (1.0)

3/4

15.7 (7.1)

3.1 (1.4)

7/8

23.0

(10.4)

4.5 (2.0)

1-1/8

39.3

(17.8)

7.8 (3.5)

1-3/8

59.8 (27.1

11.8 (5.4)

1-5/8

 

-

16.7 (7.6)

Table 17 Indoor water/glycol cooled module – R-407C refrigerant charge

Model 60 Hz

Charge / Circuit, lb(kg)

 

 

Liebert XDC 160

30.0 (13.2) per circuit

 

 

31

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Contents Liebert XDC Voltage-phase-frequency Density system = 380/415-3ph-50Hz General Safety GuidelinesExample XDC160AA Table of Contents Specifications Alarm Descriptions and SolutionsFigures Tables Equipment Inspection General Product InformationEquipment Handling Product DescriptionRemoval of Skid Handling With SkidRemove tie-down brackets Mechanical Considerations Liebert XDC dimensions, weightRemoving Piano Jacks Positioning the Liebert XDCLiebert 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-Optional for All Units Field Connections-All UnitsField Connections-Air Cooled Units only Extra Low Voltage field connections points Recommended Pipe Size European Union Fluorinated Greenhouse Gas RequirementsLiebert XDC Interconnection With Liebert XD Cooling Module Supply, return pipe sizes for Liebert XD refrigerant loopPiping Installation-R-134a Pumped Circuit Piping Installation MethodPiping Mains Bypass flow controllers for a Liebert XDC-based system Bypass Flow ControllersRequired Number Insulation Evacuation and Leak Check-R-134a Pumped CircuitLiebert XDP Liebert XDC System refrigerant charge for the supply and return mains Filling the Pumped Circuit-R-134aCalculating refrigerant charge-example Calculating Refrigerant Charge-ExampleWorksheet to calculate refrigerant charge 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 unit refrigerant charge-R-407c Filling the Direct Expansion DX Circuit-R-407cOutdoor air condenser charge-R-407c Indoor water/glycol cooled module R-407C refrigerant chargeInstallation Checklist Liebert XDC pump light indicator Checklist for Liebert XDC StartupIndicator Lights Description Green Red Refrigerant Type Compressor oil typesCompressor Type 407c Liebert XDC system is now ready to be turned on Microprocessor Control Feature OverviewDisplay User interface keypad functionsViewing or Changing Settings Feature OverviewControls Main MenuSetpoints Setpoint functions, default values and allowable rangesMIN Temp SP HI AIR TempAlarm History Active AlarmsStatus TimeRestart Setup OperationDegrees Pump Start TDLead Pump Pump OFF TDLead Tandem DipswchSetup Password Setpt PasswordCalibrate Sensors Alarm EnableCOM Alarm Enable Alarm Time DelayCustom Alarms Custom Text DiagnosticsAlarm Descriptions and Solutions Alarm DescriptionsRed and Green Lamp Indicators Alarm Time Delays Enable / Disable AlarmsView Active Alarms System Shutdown Causes View Alarm HistoryLiebert XDC troubleshooting TroubleshootingToo warm Fluorinated Greenhouse Gas Requirements MaintenanceAir Cooled Condenser Glycol Solution Maintenance Testing the Water Regulating Valve FunctionWater/Glycol Floor Stand Condenser Shell and Tube CondensersLiebert XDC specifications SpecificationsHeat Rejection Equipment Performance DataPiping Connections Performance Data204 Page Iti Ne tTi n That
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