Technical Specifications

ManualsBrandsEmerson ManualsRacks and Integrated SolutionsEmerson Liebert XD Piping System Flexible Piping for Liebert XD System

Designing a Liebert XD Solution

3.3 Selecting 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

piping circuit. This includes the Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR and

Liebert XDV.

Generally, the Liebert XDO is selected for use in new installations or renovations where the module

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

suitable 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 for new

installations.

The Liebert XDR replaces the rear door of an equipment cabinet.

Example

Continuing the preceding data center example (in 3.2 - Calculate the Heat Load to be Handled

by Liebert XD System) of a server room 2000 ft

with 30 racks (15 producing 20kW of heat per rack

and 15 producing 10 kW of heat per rack), the three Liebert XDPs required can supply coolant to

various types of Liebert XD modules. For instance, the racks with 20kW per rack could be cooled with

either Liebert XDH20, Liebert XDO20 or Liebert XDR20. The racks with 10kW per rack could be

cooled using the Liebert XDV10.

1. For the 15 racks with 20kW of heat each, the total load is:

15 racks x 20kW per rack = 300kW

The perimeter cooling will address the first 2-5kW per rack:

2kW x 15 racks = 30kW

The Liebert XD solution would have to remove 270kW for these racks with higher heat load.

300kW - 30kW = 270kW

2. For the 15 racks with 10kW of heat each, the total load is:

15 racks x 10kW per rack = 150kW

The base cooling will address the first 2-5kW/rack:

2kW x 15 racks = 30kW

The Liebert XD solution would have to remove 120kW for these racks with a higher heat load.

150kW - 30kW = 120kW

3. For this data center example, the Liebert XD solution would consist of:

• 3 Liebert XDP160s

• 12 Liebert XDV10s

and any of the following:

• 13 Liebert XDH20s

• 12 Liebert XDO20s

• 15 Liebert XDR20s

Module

Conditions

°F (°C)

Capacity at

Conditions, kW

Load,

Modules

Required

Liebert XDH20 98 (36.6) 22.0 270 13

Liebert XDO20 98 (36.6) 22.5 270 12

Liebert XDR20 98 (36.6) 22.0 270 15