Technical Specifications

Liebert XD Cooling Modules—Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR and Liebert XDV

4.4.1 Header System—Liebert XDCF

The Liebert XDCF module system requires use of the Liebert XD prefabricated piping assembly or

port kit. The prefabricated piping is compatible with the flex pipe required to attach to the Liebert

XDCF modules.

Figure 52 Liebert XDCF supply and return piping access points

4.5 Liebert XDH Standard Features

• Dual Refrigeration Circuits—Each Liebert XDH has two refrigeration circuits, one in the

upper half of the module and one in the lower half. Dual refrigeration circuits permit altering

cooling levels in response to server room conditions. The dual refrigeration circuits permits

interlaced connection of two refrigerant sources to enhance system reliability.

• Dual Power Cords and Power Inlets—The Liebert XDH is supplied with two (2) detachable

power cords 10 ft (3m) long that attach to two IEC power inlets on the rear of the module. Each

power cord has a NEMA 5-15P (IEC 320-C14) plug at the opposite end. The dual power cords

allow the module to be powered by two separate power sources. If the secondary power cord is

connected to a UPS, the Liebert XDH’s fans will continue to operate if utility power fails.

• Top Piping Access—The Liebert XDH has supply and return piping access on the top of each

module. Supply piping connection is 1/2" OD copper pipe, and return piping connection is 7/8" OD

copper.

• Corner Stabilizers—A stabilizer in each corner permits rolling the Liebert XDH with greater

ease and less chance of tipping.

• Air Diffusers—Two diffusers, one on the upper half of the module and one on the lower half,

enhance flow of cooling air. Uni-directional and bi-directional diffusers are available.

1-7/16"

(37mm)

3-9/16"

(90mm)

7-5/16"

(186mm)

Supply Pipe

(1/2" diameter)

Return Pipe

(5/8" diameter)

Pipe locations and

dimensions are the

same for upper and

lower modules