Emerson Xtreme Density manual Determining Refrigerant Volume

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Designing a Liebert XD Solution

3.16Determining Refrigerant Volume

After the preliminary system design is completed, Tables 7, through 15 may be used to determine the amount of refrigerant required. Perform the calculation below for each Liebert XD system being configured.

NOTE

All lengths in Tables 7, 8, 9 and 10, are actual pipe lengths, not equivalent pipe lengths.

3.16.1 Liebert XDP/Liebert XDC Pumped R-134a Circuit Volume

NOTE

System refrigerant volume calculations in Tables 7, 8, 9 and 10, are based on a fully loaded system. Additional charge may be required for lightly loaded systems.

Table 7 System R-134a charge for a Liebert XDP/Liebert XDC with any model Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF

Refrigerant Charge,	Per Liebert XD Unit
Refrigerant Charge,	(Excludes Connector Lines
lb (kg)	to and from Liebert XD Cooling Module)
157 lb. (65.7kg)	Liebert XDP/Liebert XDC

3.55 lb. (0.66kg)	Liebert XDO

2.32 lb. (1.05kg)	Liebert XDV

5.32 lb. (2.41kg)	Liebert XDH

1.41 lb. (0.64kg)	Liebert XDCF

Table 8	System refrigerant charge for the supply and return mains

Refrigerant Charge,
lb/foot (kg/m)		Supply/Return Main Length and Diameter

0.45 (0.67)		Main supply actual length per 1-1/8" OD copper tubing

0.68 (1.01)		Main supply actual length per 1-3/8" OD copper tubing

0.28 (0.42)		Main return actual length per 2-1/8" OD copper tubing

0.43 (0.64)		Main return actual length per 2-5/8" OD copper tubing

Table 9 R-134a refrigerant charge for hard-piped connector lines to and from any model Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF

	Refrigerant Charge,
	lb/foot (kg/m)	Hard-Piped Connector Length and Diameter
	0.08 (0.12)	1/2" OD Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF supply connector
	0.08 (0.12)	actual length
		actual length
	0.13 (0.19)	5/8" OD copper tubing Liebert XDV/Liebert XDCF supply connector actual length

	0.26 (0.39)	7/8" OD Liebert XDO/Liebert XDH supply connector actual length "

	0.02 (0.03)	5/8" OD copper tubing Liebert XDV/Liebert XDCF return connector actual length

	0.04 (0.06)	7/8" OD copper tubing Liebert XDV/Liebert XDCF return connector actual length

	0.04 (0.06)	7/8" OD copper tubing Liebert XDH/Liebert XDO return connector actual length

	0.07 (0.1)	1-1/8" OD copper tubing Liebert XDH/Liebert XDO return connector actual length

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Contents Liebert Xtreme Density Page Table of Contents Specifications XDH and Liebert XdcfIii Tables Liquid Liquid/Vapor Mix CoolFrame, XDH Direct and Indirect System Configurations European Union Fluorinated Greenhouse Gas RequirementsLiebert Heat Rejection Air Cooled or Water/Glycol Cooled Pumped RefrigerantLiebert XDO-Overhead Cooling Module Liebert XDV-Vertical, Above-Cabinet Cooling Module Liebert XDH-Horizontal Cooling Module Liebert Xdcf Liebert Xdcf units on BladeFrame EX cabinetsLiebert XDA-Air Flow Enhancer Liebert XDP-Pumping Unit Liebert XDP Minimum LoadLiebert XDC-Refrigerant Chiller Liebert XDC Minimum LoadLiebert XD field-installed port kits header connection size Liebert XD PipingLiebert XD Field Piping Flexible Piping Kit Prefabricated HeadersDetermining Cooling Equipment Needs Implementing a Hot-Aisle/Cold Aisle Design Hot aisle-cold aisle arrangement with under-floor sourceDetermine Cooling Requirements and Select Liebert XD System Calculate the Heat Load to be Handled by Liebert XD SystemAirflow Requirements for Liebert XD Solutions Configuring a Liebert XD SystemSelecting Liebert XD Cooling Modules Number of Modules Supported by a Liebert XDP or Liebert XDCLiebert XDO Placement Determining Spacing of Liebert XDOs in an AisleLiebert XDO spacing-horizontal and vertical Input Information Step Results Liebert XDV Unit PlacementLiebert XDV is suspended From ceiling structure Liebert Xdcf Placement Liebert Xdcf unit mounting locationsLiebert XDH Placement Liebert XDP/Liebert XDC PlacementInterlaced piping arrangement For enhanced protectionProtection Interlaced piping arrangement for enhanced protectionFor enhanced Liebert XD Refrigerant Liebert XD Piping System DesignSupply, return pipe sizes for refrigerant loop Key to Piping Pipe Function Size / Equivalent Pipe LengthLiebert XD Piping Slope Bypass Flow ControllersRefrigerant Pumped XD CoolFrame, XDH, XDO or XDVLiebert XDP Liebert XDC System refrigerant charge for the supply and return mains Determining Refrigerant VolumeLiebert XDP/Liebert XDC Pumped R-134a Circuit Volume Return Line Diameter 5/8 Return Line DiameterLiebert XDC DX R-407c Circuit Volume-Air Cooled Units Calculating Refrigerant Charge-ExampleCalculating refrigerant charge-example Worksheet to calculate refrigerant chargeChilled Water Piping ElectricalOutdoor condenser charge-R-407c Indoor water/glycol cooled module R-407c refrigerant chargeLiebert XDO Standard Features Optional Features Liebert XDOLeft Side XDO 24-1/8 Rear of XDO Liebert XDO internal mounting location Liebert XDV Standard Features Liebert XDO top and front electrical access pointsOptional Features-Liebert XDV Liebert XDV dimensionsDetail Area a Detail a Power Source Liebert XDV electrical connections for CSA-approved units Suspending single Liebert XDV from Unistruts Page XD CoolFrame, XDH, XDO or XDV Liebert Xdcf Standard FeaturesLiebert XDP Return Pipe Liebert Xdcf Mechanical ConsiderationsLiebert TM Egenera BladeFrame Liebert Xdcf Installation ConsiderationsLiebert Xdcf Piping Connection Methods and Points Header System Liebert XDH Standard FeaturesOptional Features-Liebert XDH Liebert XDH dimensions Supply and return piping connectionsOr 2-5/8 O.D Rear XD Cooling Module Either 5/8 or 7/8Recommended Arc Refer to for detailsLiebert XD Flex Pipe Kit Liebert XD Flex Pipe assemblies, supply and returnLiebert XD Liebert XDV CoolFrame Liebert XDHTwo-port prefabricated piping legend Liebert XD Piping Dimensions and FeaturesPiping Installation Method prefabricated headers Four-port prefabricated piping legend Branch Piping Standard Run Long Run Four Port 186551G21Five-port prefabricated piping legend Branch Piping Standard Run Long Run Five PortTen-port prefabricated piping legend Branch Piping Standard Run Long Run Ten Port 186650G51Liebert XDP Standard Features 33-1/8 990 1067 XDP160Unit piping outlet connection sizes, inches, OD Cu Model Pipe Connection Point 50/60 HZEnclosure Cover Customer Power Liebert XDC Standard Features Liebert XDC Optional FeaturesLiebert XDC piping locations Liebert XD Chiller piping connection sizesLiebert XDC Water/Glycol Piping Connection Sizes Piping locations-floor stand and valve assembly Front view of Liebert XDC and electrical enclosures Switch Transformer Electrical handy box, factory-installed with cover Liebert XDC Extra Low Voltage field connections points Liebert XDC160 specifications Performance Data Heat Rejection EquipmentPiping Connections Performance Data204 Liebert XDP160 specifications Liebert XDO16 specifications Sides, Front and Rear Liebert XDO20 specificationsPipe Connections without flex pipe Liebert XDO20 dimensions-domestic and export Liebert XDV8 specifications Liebert XDV10 specifications Liebert Xdcf specifications Liebert XDV8 dimensions-domestic and exportLiebert XDV10 dimensions-domestic and export Liebert XDH specifications Specifications Specifications Page Ne t ItiTi n That