Emerson Xtreme Density manual Liebert XD Piping Slope, Bypass Flow Controllers, Refrigerant Pumped

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Designing a Liebert XD Solution

Figure 24 Hydraulic diagram

Liebert XDC

or

Liebert XDP

Liebert XDC

or

Liebert XDP

AC

B

Pumped

 

 

 

 

D

Refrigerant

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

AC

B

Pumped

 

 

 

 

 

 

D

 

Refrigerant

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

XD Cooling

Module *

XD Cooling

Module *

XD Cooling

Module *

XD Cooling

Module *

Supply Lines

Return Lines

*XD CoolFrame, XDH, XDO or XDV

3.14Liebert XD Piping Slope

The main supply and return lines to and from the XDP/XDC must be sloped downward toward the XDP/XDC at a rate of 1-2" per 20 feet (25-51mm per 6m) of pipe run. Horizontal connector lines should also be sloped downward from the cooling modules toward the main supply and return lines.

3.15Bypass Flow Controllers

To ensure the XDP/XDC pumps operate within the optimum range, some installations require one or more bypass flow controller(s). These devices are added to the field piping, and simulate the flow of additional cooling modules.

Each bypass flow controller should be installed with one shutoff valve to allow the controller to be dis- abled when cooling modules are added to a Liebert XD system.

If bypass flow controllers are required, they should be connected between the main supply and the main return lines of the field piping. The connection points to the main supply and return lines should be in a convenient and accessible location between the Liebert XDP/Liebert XDC and the first Liebert XD module in the circuit. See Figures 26 and 25 for piping details of the bypass flow controller.

Refer to Table 6 to determine the number of bypass flow controllers needed, based on the total nomi- nal cooling capacity of the cooling modules in each Liebert XD system.

Table 6

Bypass flow controllers for Liebert XDC- or Liebert XDP-based systems

 

 

 

 

Cooling Modules -

Required Number of Bypass Flow Controllers

 

Cumulative Model Size

 

 

 

Liebert XDP

Liebert XDC

 

 

 

 

 

 

 

 

 

 

32 to 63

3

N/A

 

 

 

 

 

 

 

64 to 95

2

2

 

 

 

 

 

 

 

96 to 127

1

1

 

 

 

 

 

 

 

128 to 160

0

0

 

 

 

 

 

 

24

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Contents Liebert Xtreme Density Page Table of Contents Specifications XDH and Liebert XdcfIii Tables Liquid Liquid/Vapor Mix CoolFrame, XDH Liebert Heat Rejection Air Cooled or Water/Glycol Cooled Direct and Indirect System ConfigurationsEuropean Union Fluorinated Greenhouse Gas Requirements 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 Piping Flexible Piping Kit Liebert XD field-installed port kits header connection sizeLiebert XD Piping 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 SystemSelecting Liebert XD Cooling Modules Airflow Requirements for Liebert XD SolutionsConfiguring a Liebert XD System 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 Liebert XDV Unit Placement Liebert XDV is suspended From ceiling structureInput Information Step Results Liebert Xdcf Placement Liebert Xdcf unit mounting locationsLiebert XDH Placement Liebert XDP/Liebert XDC PlacementInterlaced piping arrangement For enhanced protectionInterlaced piping arrangement for enhanced protection For enhancedProtection Liebert XD Refrigerant Liebert XD Piping System DesignSupply, return pipe sizes for refrigerant loop Key to Piping Pipe Function Size / Equivalent Pipe LengthRefrigerant Pumped Liebert XD Piping SlopeBypass Flow Controllers XD CoolFrame, XDH, XDO or XDVLiebert XDP Liebert XDC Determining Refrigerant Volume Liebert XDP/Liebert XDC Pumped R-134a Circuit VolumeSystem refrigerant charge for the supply and return mains Return Line Diameter 5/8 Return Line DiameterCalculating refrigerant charge-example Liebert XDC DX R-407c Circuit Volume-Air Cooled UnitsCalculating Refrigerant Charge-Example Worksheet to calculate refrigerant chargeOutdoor condenser charge-R-407c Chilled Water PipingElectrical 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 Liebert Xdcf Standard Features Liebert XDPXD CoolFrame, XDH, XDO or XDV Liebert Xdcf Mechanical Considerations Liebert TMReturn Pipe Liebert Xdcf Installation Considerations Liebert Xdcf Piping Connection Methods and PointsEgenera BladeFrame Liebert XDH Standard Features Optional Features-Liebert XDHHeader System Liebert XDH dimensions Supply and return piping connectionsRecommended Arc Or 2-5/8 O.DRear XD Cooling Module Either 5/8 or 7/8 Refer to for detailsLiebert XD Liebert XDV CoolFrame Liebert XD Flex Pipe KitLiebert XD Flex Pipe assemblies, supply and return Liebert XDHLiebert XD Piping Dimensions and Features Piping Installation Method prefabricated headersTwo-port prefabricated piping legend 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 Piping Connections Performance DataHeat Rejection Equipment Performance Data204 Liebert XDP160 specifications Liebert XDO16 specifications Liebert XDO20 specifications Pipe Connections without flex pipeSides, Front and Rear Liebert XDO20 dimensions-domestic and export Liebert XDV8 specifications Liebert XDV10 specifications Liebert XDV8 dimensions-domestic and export Liebert XDV10 dimensions-domestic and exportLiebert Xdcf specifications Liebert XDH specifications Specifications Specifications Page Ti n Ne tIti That