Vertiv Liebert XD Series, System Design Manual

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2. Another possibility would be to mix the Liebert modules in a manner that allows each Liebert
XDP to have similar 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
Table 3.3 Sample Liebert XD coolant supply loop connections, balanced 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 3.3 above, which has a load of 130kW,
could accept modules that would remove 30kW: one Liebert XDH20 and one Liebert XDV10.
3.4.2 System Connection Configuration
If possible, connect the Liebert XD modules to Liebert XDPs or Liebert XDCs in an interlaced configuration
(see Figure 3.1 on the next page). In an interlaced configuration, half the cooling modules in an aisle are
connected to one Liebert XDP or Liebert XDC and the other half in that aisle are connected to another
Liebert XDP or Liebert XDC. Interlacing the connection piping will keep half the Liebert XD modules
operating and maintain cooling in the conditioned space should one of the Liebert XDP or Liebert XDC
units fail.
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