Technical Specifications

System Description
7
1.7 Liebert XDR—Rear Cooling Module
The Liebert XDR is a cooling system for high-density heat loads that mounts on the rear of a 24"
(600mm) x 42U rack (consult the factory for other rack sizes) and maintains access to the back of the
server rack. Room air is drawn in through the front of the rack and picks up heat from the servers.
The coil captures that heat, cooling the air, which is expelled through the rear of the rack.
The Liebert XDR relies on the rack equipment’s fans to move air across the microchannel coil.
Captured heat is carried away through pumped R-134a refrigerant supplied by either a Liebert XDP
or Liebert XDC.
The Liebert XDR is available in hard-piped configurations or with Liebert XD Flex Pipes with
quick-connect couplings (one-shot or removable) for easy connection to the header system. The Liebert
XDR and flexible pipes are also available pre-charged with R134a refrigerant. This option requires
the one-shot connections.
Figure 7 Liebert XDR on cabinet