Specifications
Liebert XD Cooling Modules—Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR and Liebert XDV
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4.4.1 Header System
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 41 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 unit 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 unit. Each
power cord has a NEMA 5-15P (IEC 320-C14) plug at the opposite end. The dual power cords
allow the unit to be powered by two separate power sources. If the secondary power cord is con-
nected to a UPS, the Liebert XDH unit 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 unit and one on the lower half,
enhance flow of cooling air. Uni-directional and bi-directional diffusers are available.
4.6 Optional Features—Liebert XDH
• Smart Module—Smart modules will allow remote shutdown, fan failure alarms and automati-
cally switching the second fan bank On and Off. The controls save energy by permitting the unit
to turn one fan in each fan bank Off based on the supply and return temperature. For electrical
connection details, refer to the Liebert XDH user manual, SL-17210, available on the Liebert Web
site: www.liebert.com
• Refrigerant Precharge—The Liebert XDH can be precharged with refrigerant. The unit will
have one-shot fittings and will be pressurized. The one-shot Liebert XD Flex Piping will also be
precharged with refrigerant.
• Field-Installed Flexible Piping (for use with prefabricated piping assemblies)—Field-installed
flexible piping kits are available in lengths of 4, 6, 8 and 10 feet (1.2, 1.8, 2.4 and 3 meters). Con-
nection style to the unit end may be straight or 90 degrees with one-shot style couplings or remov-
able couplings. Flex pipes with one-shot connections will have pressurized R134a. Flex pipes with
removable connections will have a low pressure nitrogen charge Connection to the prefabricated
piping assembly is with a threaded coupler. For information on acquiring the correct kit for your
installation, refer to DPN000780, available by calling 1-800-LIEBERT and from your local Emer-
son representative.
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 units