Technical Specifications

Designing a Liebert XD Solution
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3.4 Configuring a Liebert XD System
3.4.1 Number of Modules Supported by a Liebert XDP or Liebert XDC
The numerals designating the model size of a Liebert XD module may be used to configure a cooling
system. For example, a Liebert XDO20 has a model size of 20 and a Liebert XDP160 will
accommodate cooling modules with a cumulative model size of 160.
Similarly, the minimum number of modules connected to a Liebert XDP or Liebert XDC may be calculated
using the model size number for the Liebert XDP or Liebert XDC and the modules. See Table 2.
Different types of Liebert XD cooling modules may be connected to the same Liebert XDP or Liebert
XDC as long as the sum of their cooling capacity does not exceed the supporting Liebert XDP’s or
Liebert XDC’s model size number.
Example
Continuing the example in 3.3 - Selecting Liebert XD Cooling Modules, the Liebert XD solution
in that example consisted of:
• Three (3) Liebert XDPs and
• 12 Liebert XDV10s
and any of the following:
• 13 Liebert XDH20s
• 12 Liebert XDO20s
• 15 Liebert XDR20s
1. Using the Liebert XDH20 to continue with the example, the Liebert XD systems could be
populated so that the modules were on dedicated Liebert XDPs.
2. Another possibility would be to mix the Liebert modules in a manner that allows each Liebert
XDP to have similar loads.
*Note: An individual Liebert XDP160 or Liebert XDC160 can remove up to 160kW. The 160kW
can be removed by the various modules whose individual capacities may vary based on the data
center conditions, such as the entering air temperatures or entering refrigerant temperature.
For the Liebert XD system examples above, additional modules may be added as heat loads
increase until the 160kW maximum is reached. The Liebert XDP 3 in the example in Table 4,
which has a load of 130kW, could accept modules that would remove 30kW: one Liebert XDH20
and one Liebert XDV10.
Table 2 Maximum and minimum modules supported by a Liebert XDP or Liebert XDC
Cooling Module Type
Liebert XDC Liebert XDP
Max Min Max Min
Liebert XDCF10 16 6 16 5
Liebert XDH20 8483
Liebert XDH32 5252
Liebert XDO16 10 4 10 3
Liebert XDO20 8483
Liebert XDR20 8483
Liebert XDV8 20 8 20 6
Liebert XDV10 16 7 16 5
Table 3 Sample Liebert XD coolant supply loop connections
Liebert XD Loop Liebert XDH20 Liebert XDV10 Maximum Loop Load, kW
Liebert XDP 1 7 modules 0 modules 154
Liebert XDP 2 6 modules 0 modules 132
Liebert XDP 3 0 modules 12 module 120
Table 4 Sample Liebert XD coolant supply loop connections, balanced loads
Liebert XD Loop Liebert XDH20 Liebert XDV10 Applied System Load, kW*
Liebert XDP 1 4 modules 5 modules 138
Liebert XDP 2 4 modules 5 modules 138
Liebert XDP 3 5 modules 2 module 130