Vertiv Liebert XD Series, System Design Manual

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The Egenera BladeFrame EX cabinet has provisions for mounting two Liebert XDCF modules, should the
heat load require two modules. If only one Liebert XDCF will be needed, Liebert recommends using the
lower Liebert XDCF module.
The complete system consists of Liebert XDCF modules, piping, Liebert XDP or Liebert XDC refrigerant
distribution units and those units’ chillers or drycoolers.
Figure 3.2 Liebert XDCF module mounting locations
3.7 Liebert XDH Placement
The free-standing Liebert XDH cooling module is best placed among the equipment cabinets in a
hot aisle-cold aisle arrangement (see Figure 3.3 on the next page). The Liebert XDH draws in air from the
hot aisle, cools it and discharges the cooled air into the cold aisle where it is drawn into the equipment
cabinets. Even spacing aids in optimizing cooling.
Liebert XDH modules should be placed among the cabinets that generate the greatest amount of heat. If
heat loads are dispersed evenly throughout the room, the Liebert XDH modules may be spread out
accordingly. Bi-directional air diffusers should be used on Liebert XDH modules installed between racks.
If a Liebert XDH is installed at the end of a row, uni-directional air diffusers should be used on that Liebert
XDH. The uni-directional diffusers can be used for left or right air discharge by removing them from the
Liebert XDH, turning them 180 degrees, then reattaching them to the Liebert XDH.
Vertiv | Liebert® Xtreme Density™ System Design Manual | 27