Emerson XDR user manual Airflow, Generic airflow diagram

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Mechanical Considerations

4.3Airflow

The server fans draw air into the equipment enclosure. After heated the air, the server fans force the air across the Liebert XDR’s two coils. The Liebert XDR has a low air-side pressure drop (similar to a rack with perforated doors). The server fans within the rack create sufficient airflow to move the air.

Figure 10 Generic airflow diagram

Enclosure /Rack

Shown from Side

Refrigerant

Connections

Liebert XDR

Critical

Equipment

Front

of

Rack

Rear

of

Rack

NOTE

Air bypass and recirculation can severely reduce the cooling effectiveness of the Liebert XDR. Blanking plates must be installed in any voids in the rack to prevent air bypass and air recirculation. Contact the factory for further information. Refer to the user manual supplied with the rack the Liebert XDR is mounted on.

Efficient cooling of rack equipment depends on proper use of blanking plates in any voids in the rack and good cable management. Keep the Liebert XDR’s coils clear of any obstructions that may block the airflow.

Each of the Liebert XDR’s coils removes approximately half the load. For even cooling in partially filled racks, servers should be evenly spaced and blanking plates should be installed on unused rack spaces to prevent recirculation of heated air.

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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 XDR20B1RInstallation Considerations Pre-Installation ChecksReferences Packing ListChecking 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 PointsRecommended Piping Size Hard-Piped Connection SizesBrazing Preparations 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