Emerson XDR user manual Hex body, union nut on one-shot coupling

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Piping

Figure 20 Hex body, union nut on one-shot coupling

Union Nut

Hex Body

NOTICE

Risk of improper tightening. Can cause equipment damage.

It is imperative that the brass body on the Liebert XD Flex Pipe coupling does not rotate while the union nut is being tightened. If the brass body rotates, it may damage the Liebert XD Flex Pipe.

5.Hold the brass body of the Liebert XD Flex Pipe with a wrench so that it does not rotate and use the torque wrench to tighten the union nut to the proper value shown in Table 2.

Table 2 Torque and wrench size for connecting Liebert XDR with one-shot couplings to Liebert XD Flex Pipe

	Coupling	Wrench Sizes,	Torque, Union Nut
	Coupling	in. (mm)	Torque, Union Nut
	Size		Only, ft-lb (Nm)
	Size	Union Nut	Only, ft-lb (Nm)
		Union Nut

	#10 (Supply)	1-5/16 (34)	35-45 (13.5-6.2)

	#12 (Return)	1-3/8 (35)	50-60 (67.8-88.1)

If a torque wrench is not available, continue with the steps below.

6.Tighten the union nut on the Liebert XD Flex Pipe to the coupling on the module with the proper- sized wrench until a definite resistance is felt, metal-to-metal contact.

7.Use a marker or pen to draw a line lengthwise across the module coupling to the Liebert XD Flex Pipe. The line should parallel the Liebert XD Flex Pipe.

8.Tighten the nuts an additional one (1) wrench flat (60°), judging the amount by the mark drawn in Step 7.

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Contents Liebert XDR Fluorinated Greenhouse Gas Requirements-European Union Important Safety GuidelinesTable of Contents Specifications Installation Checklist and System Fill for StartupFigures Page Component Locations and Model Number Nomenclature Example XDR20B1RPacking List Pre-Installation ChecksInstallation Considerations ReferencesChecking and Unpacking Product/System DescriptionModule Handling Recyclable PackagingUnpacking the Module Removing packaging Remove Liebert XDR from pallet Removing the Liebert XDR from the PalletMove the Liebert XDR Liebert XDR DimensionsOverall dimensions with one-shot coupling pre-charged Overall dimensions with removable coupling Determining Placement in the Conditioned SpaceAirflow Generic airflow diagramMounting the Liebert XDR on the Rack-Mounting Kit Installing the Rack-Mounting Kit onto the RackDoor Safety Catch European Union Fluorinated Greenhouse Gas Requirements System Connection ConfigurationInsulation Connection Methods and PointsHard-Piped Connection Sizes Brazing PreparationsRecommended Piping Size Refer to for details Leak-Checking and Evacuation Header SystemDegree Connection TOP View Male coupling on Liebert XD cooling module Tools RequiredHex body, union nut on one-shot coupling Connection Methods-Removable Couplings Removable couplings Return Main Supply Main Oil rings on header and Liebert XD Flex Pipe connectors Do not Overtighten Piping mains without Liebert XD Flex Pipe Disconnect a Liebert XD Flex Pipe from a Liebert XD SystemRemoving the Liebert XDR from a Cabinet Disconnecting the Liebert XD Flex Pipe from the Liebert XDRCharging with Refrigerant Checklist for Proper InstallationStarting the Liebert XD System Fluorinated Greenhouse Gas Requirements MaintenanceSpecifications Page Ne t