Liebert XDH manual Product Description, References, Pre-Installation Checks

Page 6

Introduction

2.0INTRODUCTION

2.1Product Description

The Liebert XDH cooling module is designed to be placed within a row of server enclosures in a hot- aisle-cold-aisle arrangement. The Liebert XDH, available in a half-rack-width unit, is intended for use with a Liebert XD pumped refrigerant cooling system, supplied by either a Liebert XDP or Liebert XDC.

Warmer air from the enclosures is drawn in through the rear of the Liebert XDH, cooled and blown into the cold aisle in a diffuse pattern. The cooling air is then drawn into the enclosures to cool the equipment.

The Liebert XDH has dual refrigeration circuits, one in the upper half of the unit and the other in the lower half. This permits increasing and decreasing cooling levels in response to server room condi- tions. The dual refrigeration circuits permits interlaced connection of two Liebert XD refrigerant sources to enhance system reliability.

Controls on the front of the Liebert XDH permit independent operation of the two banks of fans. Dual power connections ensure continued fan operation if one of two electrical sources fails.

The Liebert XDH is intended for use in low-humidity environments and does not need a drain connec- tion. A condensate pan under each refrigeration unit collects the small amount of moisture expected in the server room. An optional, factory-installed condensate detection system is available. The Lie- bert XDH is available with uni-directional or bi-directional air diffusers.

2.2References

This document must be used together with site specific documentation and documentation for other parts of the system.

2.3Pre-Installation Checks

•Verify that the Liebert XDH voltage matches the available utility power. The serial tag with this information is accessible by opening the Liebert XDH’s rear door. The tag is on a shelf near the Liebert XDH’s midline.

•Check the received materials to be sure all required assemblies and parts have been received. If you discover any external damage, report it to the shipping company and your local Liebert repre- sentative.

2.4Parts Included With the Liebert XDH

•User manual (this document)

•Liebert XDH module

•Power cords

•Shipping/floor mounting brackets

•Tie-down bracket assembly

•Diffusers (top and bottom)

2

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Liebert XDH General Safety Guidelines Fluorinated Greenhouse Gas Requirements-European UnionTable of Contents Maintenance SpecificationsOperation Example XDH32BK Liebert XDH component locationsReferences Pre-Installation ChecksProduct Description Parts Included With the Liebert XDHInstallation Considerations Room PreparationProduct/System Description Checking and UnpackingEquipment Inspection Recyclable PackagingUnit Handling Unpacking the UnitTaking the Unit off the Pallet Prepare ramp to remove the Liebert XDH from shipping palletAttaching ramp, removing the Liebert XDH from pallet Determining Placement in the Conditioned Space Installing the Liebert XDH Within the Enclosure RowAirflow Direction XDHInstall Air Diffusers for Best Airflow Direction Change airflow directionSystem Connection Configuration European Union Fluorinated Greenhouse Gas RequirementsTypical Liebert XDH piping-non-interlaced connection Indirect system configuration-hydraulic system schematic Hard pipe connection diagram Connection Methods and PointsVenting the Holding Charge and Connecting to Mains Piping Considerations-Hard-Piped ConnectionsRear of Liebert XDH Recommended Piping Size Connecting Methods-One-Shot ConnectionsConnection Methods for Hard Pipe Brazing PreparationsDegree Connection Connecting Liebert XD Flex Pipes to Liebert XDH Modules Header SystemTools Required Liebert XD prefabricated piping assembly Tools Required Return Line Service Valve Supply InsulationConnecting High Voltage Wiring ElectricalConnecting Low Voltage Wiring-Optional Condensate wiring entry pointsChecklist for Proper Installation Charging with Refrigerant and Starting the Liebert XD SystemStart the Liebert XDH OperationInternal Access Fluorinated Greenhouse Gas RequirementsRemove Fan Tray Remove fan traySpecifications Liebert XD Flex Pipe assemblies, supply and return Page Ne t
Top Page Image Contents