Vertiv Liebert XD Series, System Design Manual

Page: 68 / 200

WARNING! Do not disconnect one-shot connections after they have been connected.
Disconnection will release pressurized R-134a refrigerant from the Liebert XDCF.
The Liebert XDCF has supply and return piping access on the top of each module.
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 4.4 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.
Vertiv | Liebert® Xtreme Density™ System Design Manual | 68