Item Description
4 Air Bleeders
5 Balance Valve
6 Strainer
7.3.3 Air Bleeders
Install air bleeders on horizontal pipe between branch runs and at each high point in the secondary fluid field piping circuit.
To do so, connect an air bleeder to the ¼” QC thread of the Schrader valve on the pump discharge line. You will need to
“bump” the pump after the system is filled with fluid to help remove the air. Also plan in an air separator or other means to
easily remove air from the data center piping loop. Failure to do so will cause delays during start-up.
7.3.4 Fluid Volume for Unit and Connection Piping
The following tables provide the fluid volume requirements for the Vertiv™ CoolPhase CDU and connected piping/hosing.
Unit Model Fluid Volume, gal. (L)
Liebert® XDM 300 24 (90)
Table 7.3 Volume of Unit Internal Fluid Circuit
7.3.5 Field Piping Connection Volumes
Field supplied, field installed piping (copper, etc.) depends on pipe diameter and length. Table 7.3 below describes the typical
fluid volumes depending on pipe diameter.
NOTE: If total fluid system volume per Vertiv™ CoolPhase CDU is over 95 gallons for glycol (40% or less), or 175
gallons for water, a system thermal expansion tank is required. Size per expansion tank manufacturer
recommendation.
Line Size, OD, in
Fluid Volumes
gal/ft l/m
2-1/2 0.25 3.105
3 0.35 4.347
3-1/2 0.48 5.961
4 0.62 7.699
5 1.02 25.3
Table 7.4 Piping Fluid Volume Gallon per Foot (Liter per Meter) Reference Type L Copper
68 Proprietary and Confidential ©2024 Vertiv Group Corp.
7 Secondary Fluid Circuit
Requirements
Vertiv™ CoolPhase CDU Installer/User Guide
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