Vertiv Liebert XD Series, System Design Manual

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The maximum amount of R-134a refrigerant that can be used in a single Liebert XDP/Liebert XDC/Liebert
XD module system within this space is
13 * (50000/1000) = 13 * 50 = 650 lb
.
Multiple Liebert XD systems can be installed in this space, as long as the amount of R-134a refrigerant in
any one system does not exceed 650lb. (294.8kg).The maximum amount of refrigerant is 650lb (294.8kg)
per Liebert XD loop.
NOTE: Local codes might permit exceeding the maximum refrigerant limit above if a refrigerant
detector and an exhaust system are installed. Installing oxygen sensors may meet some local codes.
3.23 Determining Refrigerant Volume
After the preliminary system design is completed, Table 3.14 below throughTable 3.19 on page 58 may
be used to determine the amount of refrigerant required. Perform the calculation below for each Liebert
XD system being configured.
NOTE: All lengths in Table 3.14 below,Table 3.15 below,Table 3.16 on the facing page andTable 3.17
on the facing page, are actual pipe lengths, not equivalent pipe lengths.
3.23.1 Liebert XDP/Liebert XDC Pumped R-134a Circuit Volume
This is the refrigerant circuit from the Liebert XDP/Liebert to the Liebert XD cooling module.
NOTE: System refrigerant volume calculations in Table 3.14 below,Table 3.15 below,Table 3.16 on the
facing page andTable 3.17 on the facing page, are based on a fully loaded system. Additional charge
may be required for lightly loaded systems.
Refrigerant Charge, lb (kg) Per Liebert XD Unit (Excludes Connector Lines to and from Liebert XD Cooling Module)
157 (71.2) Liebert XDP/Liebert XDC
3.55 (1.61) Liebert XDO
2.32 (1.05) Liebert XDV
2.66 (1.21) Liebert XDH (per circuit)
1.41 (0.64) Liebert XDCF
4 (1.81) Liebert XDR
Table 3.14 System R-134a charge for a Liebert XDP/Liebert XDC with any model
Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF
Refrigerant Charge, lb/foot (kg/m) Supply/Return Main Length and Diameter
0.45 (0.67) Main supply actual length per 1-1/8" OD copper tubing
0.68 (1.01) Main supply actual length per 1-3/8" OD copper tubing
0.28 (0.42) Main return actual length per 2-1/8" OD copper tubing
0.43 (0.64) Main return actual length per 2-5/8" OD copper tubing
Table 3.15 System refrigerant charge for the supply and return mains
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