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Piping
15
5.3 Connection Methods and Points
Refer to site specific drawings for general locations of the piping connections. For Liebert XDH con-
nection locations, refer also to Figure 16.
The assembly and connection means used for piping in the Liebert XD system are the same as those
used in conventional refrigeration systems. Observe all standard practices during installation and
startup to prevent damage and contamination.
Supply piping connection is 1/2" OD copper pipe, and return piping connection is 7/8" OD copper. Both
supply and return fittings may be supplied with optional one-shot connections. These fittings contain
pressurized R-134a refrigerant inside the Liebert XDH.
The Liebert XDH has supply and return piping access on the top of each module.
Figure 15 Hard pipe connection diagram
Rear of
Liebert XDH
Copper Tubing
Total length of each
line from Liebert XDH
to Main; not to exceed
72" (1829mm)
Top of
Liebert XDH
Recommended Arc
Supply Main
(seen from end )
1-1/8" O.D.
or 1-3/8" O.D.
1/2” Refrigerant-Grade
Full-Port Ball Valve
Field-Supplied and
Field- Installed
Return Main
(seen from end )
2-1/8" O.D.
or 2-5/8" O.D.
Acceptable Arc
7/8” Refrigerant-Grade
Full-Port Ball Valve
Field-Supplied and
Field-Installed
Supply
to Cooling
Module
Return from
Cooling Module
Refer to Table 2 for details.