Liebert XDH manual Product/System Description, Checking and Unpacking

General product information

3.0GENERAL PRODUCT INFORMATION

3.1Product/System Description

The Liebert XDH is designed for placement within a row of computer cabinets in the data center in a hot-aisle-cold-aisle arrangement to maximize the Liebert XDH’s cooling: The unit takes in hot air through the rear from the hot aisle, cools the air by air-to-fluid heat exchangers and discharges the air through the front of the unit into the cold aisle.

Chilled R-134a refrigerant is provided to the Liebert XDH by a Liebert XD Pumping unit (Liebert XDP) or by a Liebert XD Chiller (Liebert XDC). The Liebert XDH may be installed in a Liebert XD piping system that includes other Liebert XD cooling modules, such as the Liebert XDO, Liebert XDV or Liebert XD CoolFrame.

Replaceable front panels on the Liebert XDH may be customized to match the appearance of various computer manufacturer’s equipment, allowing the Liebert XDH to blend in with adjacent server equipment and enclosures. Air diffusers are available to direct cooling air for more efficient cooling, depending on the Liebert XDH’s positioning in a row or at the end of a row.

The Liebert XDH is not expected to produce any condensation because of its location, usually in the data center. A condensate pan is provided as a precaution. It does not have a drain fitting or other means of being emptied.

A Liebert Liqui-tect moisture detection device and a contact-closure output are available as an option. These options detect condensation in the Liebert XDH’s catch pan and connect to a monitoring or alarm system. A front panel alarm and indicator alert the user to condensation inside the unit.

The complete cooling system consists of Liebert XDH modules, Liebert XDP or Liebert XDC pumped refrigerant distribution units, power and signal cabling and interconnecting piping, see Figure 3 below.

Figure 3 Liebert XDH hydraulic schematic

Liebert XDC

or

Liebert XDP

Liebert XDC

or

Liebert XDP

Pumped

Refrigerant

Pumped

Refrigerant

XD Cooling

Module *

XD Cooling

Module *

XD Cooling

Module *

XD Cooling

Module *

Supply Lines

(2 per unit)

Return Lines

(2 per unit)

*XDCF, XDH, XDO or XDV

3.2Checking and Unpacking

When the Liebert XDH is delivered, inspect all items for either visible or concealed damage. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Liebert or to your sales representative. If you later find any concealed damage, report it to the shipping company and your local Liebert representative.

Check to be sure all required assemblies and parts have been received.

The Liebert XDH is shipped in protective packaging and secured to a pallet (see Figure 5). Do not remove these protective items from the Liebert XDH before it is at the installation location. When unpacking and handling the Liebert XDH, exercise extra care to prevent damage.

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