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Emerson Xtreme Density Manuel D’Utilisation

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Liebert XD Cooling Modules—Liebert XDO, Liebert XDV, Liebert XDH and Liebert XDCF
45
4.7.2 Piping Connections to Liebert XDP or Liebert XDC
Piping Installation for Hard Piped System
The assembly and connection means for piping in the Liebert XD system are similar to those used for 
conventional refrigeration systems. All piping should be installed with high-temperature brazed 
joints. Soft solder is not recommended. During brazing, the lines must be filled with flowing dry nitro-
gen to prevent excessive oxidation and scale formation inside the piping. Prevailing good refrigeration 
practices must be employed for piping supports, leak testing, dehydration and charging. Failure to 
use good system practices may result in damage to the system. Refer to the ASHRAE refrigeration 
handbook for general good-practice refrigeration piping.
Follow all guidelines in 3.13 - Liebert XD Piping System Design and 3.14 - Liebert XD Piping 
Slope during installation.
Figure 45 Hard-pipe connection diagram for Liebert XDV, Liebert XDO and Liebert XDH cooling modules 
Return Main
(seen from end )
2-1/8" O.D.
Or 2-5/8" O.D.
Supply Main
(seen from end )
1-1/8" O.D.
or 1-3/8" O.D.
Recommended Arc
Acceptable Arc
1/2” Refrigerant -Grade
Full-Port Ball Valve
Field-Supplied and 
Field Installed
Either 5/8” or 7/8" 
Refrigerant -Grade
Full-Port Ball Valve
Field-Supplied and 
Field Installed
Copper Tubing
Total length of each line 
from XD cooling module 
(XDH, XDO, XDV) to Main;
not to exceed  72" (1829 mm)
Return from Cooling 
Module
Supply
to Cooling Module
Rear of
XD Cooling
Module
Top of XD Cooling Module
Refer to Table 5 for details.