Technical Specifications

System Description
2
1.2 Generic Piping Layouts
Liebert XD systems are available in two configurations—differentiated essentially by the method of
heat rejection (see Figures 1 and 2). The Liebert XDP is a pumping unit connected to a building
chilled water system to control and circulate the refrigerant. Liebert XDPs pump refrigerant to
Liebert XDCF, Liebert XDH, Liebert XDO, Liebert XDR or Liebert XDV modules, isolate refrigerant
circuit from building chilled water supply with an internal heat exchanger and maintains refrigerant
temperature above the actual dew point. The Liebert XDC incorporates the pumping functions with
the chiller, which must be connected to a separate heat rejection system. Pumping and refrigerant
control are performed by Liebert XDC.
Figure 1 Liebert XDP generic piping layout
Figure 2 Liebert XDC generic piping layout
Supply Piping
Return Piping
Building
Chilled
Water
Liebert
XDP
Liebert
XDP
* Liebert XD
Cooling Module
* Liebert XD
Cooling Module
* Liebert XD
Cooling Module
Pumped
Refrigerant
R134a
* Liebert XDCF ,
Liebert XDH, Liebert
XDO, Liebert XDR or
Liebert XDV
Pumped
Refrigerant
R134a
Liebert XDP System Configuration
Pumped
Refrigerant
R134a
Supply Piping
Return Piping
Liebert XDC
Liebert XDC
Liebert Heat
Rejection
Air-Cooled or
Water/Glycol -
Cooled
Liebert XD
Cooling Module *
* Liebert XDCF,
Liebert XDH, Liebert
XDO, Liebert XDR or
Liebert XDV
Liebert XD
Cooling Module *
Liebert XD
Cooling Module *
Liebert XD
Cooling Module *
Pumped
Refrigerant
R134a
R407C
R407C
Liebert XDC System Configuration