Emerson Liebert Xtreme Density Specifications download pdf (Page 26)

Designing a Liebert XD Solution

3.13 Determining Coolant Volume

After the preliminary system design is completed, Tables 5, through 9 may be used to determine the

amount of coolant required. Perform the calculation below for each XD system being configured.

3.13.1 Liebert XDP/XDC Pumped R-134a Circuit Volume

Verify that the coolant volume of the XD system with the longest piping length is within the allowable

limit. If the allowable limit is exceeded, exceeded, the XDP/XDC should be moved closer to the cooling

modules. Another way to shorten the total pipe length is to reroute the pipe runs.

NOTE

All lengths in the tables below—Tables 5 and 6 —are actual pipe lengths, not equivalent pipe

lengths

Table 5 Coolant volume calculations – XDP/XDC with XDV systems

145 lb. R-134a per XDP (includes charge of one XDP while running)

+1.46 lb. R-134a per XDV (does not include piping connector lines to and from XDV)

0.45 lb. per foot (305mm) of main supply actual length per 1-1/8" OD copper tubing

0.68 lb. per foot (305mm) of main supply actual length per 1-3/8" OD copper tubing

0.28 lb. per foot (305mm) of main return actual length per 2-1/8" OD copper tubing

0.43 lb. per foot (305mm) of main return actual length per 2-5/8" OD copper tubing

0.08 lb. per foot (305mm) of 1/2" OD copper tubing XDV supply connector actual length

0.13 lb. per foot (305mm) of 5/8" OD copper tubing XDV supply connector actual length

0.02 lb. per foot (305mm) of 5/8" OD copper tubing XDV return connector actual length

0.04 lb. per foot (305mm) of 7/8" OD copper tubing XDV return connector actual length

= Amount of XD Coolant needed for ONE XDV/XDP system

Table 6 Coolant volume calculation – XDP/XDC with XDO systems

145 lb. R-134a per XDP (includes charge of one XDP while running)

+2.92 lb. R-134a per XDO (does not include piping connector lines to and from XDO)

0.45 lb. per foot of main supply actual length per 1-1/8" OD copper tubing

0.68 lb. per foot of main supply actual length per 1-3/8" OD copper tubing

0.28 lb. per foot of main return actual length per 2-1/8" OD copper tubing

0.43 lb. per foot of main return actual length per 2-5/8" OD copper tubing

0.08 lb. per foot of 1/2" OD XDO supply connector actual length

0.26 lb. per foot of 7/8" OD XDO supply connector actual length

0.04 lb. per foot of 7/8" OD copper tubing XDO return connector actual length

0.07 lb. per foot of 1-1/8" OD copper tubing XDO return connector actual length

= Amount of XD Coolant needed for ONE XDO/XDP system

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Emerson Liebert Xtreme Density Specifications Page 26