Emerson Xtreme Density Selecting Liebert XD Cooling Modules, Configuring a Liebert XD System

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Designing a Liebert XD Solution

3.3Selecting Liebert XD Cooling Modules

The next step is to select the Liebert XD cooling modules to be configured into the solution. Liebert XD modules that use pumped refrigerant can be connected to the same Liebert XDP/Liebert XDC pip- ing circuit. This includes the Liebert XDCF, Liebert XDH, Liebert XDO and Liebert XDV.

Generally, the Liebert XDO is selected for use in new installations or renovations where the unit can be installed on the ceiling or in the overhead space.

The Liebert XDV is designed to permit mounting directly on top of an equipment cabinet, for ease of installation in existing facilities. The Liebert XDV may also be suspended from overhead, using suit- able mounting methods.

The Liebert XDCF is a self-contained module designed to cool Egenera’s BladeFrame EX cabinets and equipment without exhausting heat into the room. Two modules may be mounted on the rear of a BladeFrame cabinet.

The Liebert XDH is installed among equipment cabinets and is particularly suited to new installa- tions.

3.4Airflow Requirements for Liebert XD Solutions

Computer manufacturers typically specify a temperature change from intake to exhaust (delta T) of 18-27°F (10-15°C) for the air passing through a rack enclosure. The heat generated by electronic equipment combined with the tight quarters of equipment cabinets mean that high volumes of air must move through an enclosure to meet this cooling specification.

A Liebert XD system can supply the cooled air to satisfy this cooling demand, but airflow through the enclosure must be adequate to extract the heat from the cabinet. Liebert’s XDA units can boost the airflow to levels necessary to protect critical equipment. The Liebert XDA is particularly suited to the hot aisle/cold aisle arrangement.

3.5Configuring a Liebert XD System

3.5.1Number of Modules Supported by a Liebert XDP or Liebert XDC

The numerals designating the model size of a Liebert XD unit may be used to configure a cooling sys- tem. For example, a Liebert XDO20 has a model size of 20 and a Liebert XDP160 will accommodate cooling modules with a cumulative model size of 160.

Similarly, the minimum number of modules connected to a Liebert XDP or Liebert XDC may be calcu- lated using the model size number for the Liebert XDP or Liebert XDC and the modules. See Table 2.

Table 2 Maximum and minimum modules supported by a Liebert XDP or Liebert XDC

Cooling

Liebert XDC

Liebert XDP

 

 

 

 

Module Type

Max

Min

Max

Min

 

 

 

 

 

Liebert XDCF

16

6

16

4

 

 

 

 

 

Liebert XDH20

8

4

8

2

 

 

 

 

 

Liebert XDH32

5

2

5

1

Liebert XDO16

10

4

10

2

 

 

 

 

 

Liebert XDO20

8

4

8

2

 

 

 

 

 

Liebert XDV8

20

8

20

4

Liebert XDV10

16

7

16

4

 

 

 

 

 

Different types of Liebert XD cooling modules may be connected to the same Liebert XDP or Liebert XDC as long as the sum of their cooling capacity does not exceed the supporting Liebert XDP’s or Lie- bert XDC’s model size number.

NOTE

Connecting only Liebert XDCF modules to a Liebert XD unit is not recommended because the Liebert XDCF heat loading is dependent on server airflow and server load. Consult factory to determine if sufficient heat load is available from the server for the Liebert XD system to operate effectively.

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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
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