System Connection Configuration; Figure 10 Typical Xdo Piping-Interlaced Connections; Figure 11 Typical Xdo Piping-Non-Interlaced Connection - Liebert XDO16BK-0 User Manual

4.4

System Connection Configuration

If possible, connect the XDO modules to XDPs or XDCs in an interlaced configuration (see
Figure 10). Interlacing the connection piping will keep half the XDP/XDC units operating and main-
tain even cooling in the conditioned space should one of the XDP or XDC units fail.
However, in a system with just one XDP or XDC, connect XDO modules in a non-interlaced configura-
tion (see Figure 11).
Figure 10 Typical XDO piping—interlaced connections
XDP/XDC A
Supply A
Return A
Return B
Supply B
XDP/XDC B
NOTE: Line size does NOT indicate pipe size difference.
Figure 11 Typical XDO piping—non-interlaced connection
Return
Supply
XDP/XDC
TOP VIEW—NOT TO SCALE
XDO A XDO B
XDO B XDO A
TOP VIEW—NOT TO SCALE
XDO A XDO A
11
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Mechanical Considerations
XDO A XDO B
XDO B XDO A
XDO A XDO A