HP Modular Cooling System manual Coolant source planning

Coolant source planning

A number of factors relating to a chilled water distribution system must be considered during the site preparation process, including the following:

•Redundant water configurations (For more information, see Appendix B.)

•Type of water source (shared water or dedicated chilled water loop)

•Maximum and minimum temperatures of building chilled water plant, and target chilled water temperature of dedicated loop based on total cooling capacity required and planned

•Viscosity of the chilled liquid, combined with the length and elevation changes in piping, determined by selected route, which can affect the selection of pipe size

Caution:

The minerals and chemicals typically found in tap water can react with metallic elements used in the MCS 5042. Electro-chemical reaction might cause scaling, corrosion, leaks, and blockage, ultimately resulting in reduced efficiency of the cooling system and even damage.

HP recommends that the water source for the MCS 5042 be a dedicated chiller unit or water-to-water heat exchanger that enables line isolation, better control of individual systems, and regulated water quality. The chilled water source for this loop is provided by one or more chiller systems. Advantages of using a dedicated loop include:

•Easier scheduling of maintenance to either a building system or dedicated MCS 5042 loop

•Easier maintenance of water quality parameters in the dedicated closed loop

•Better temperature and flow regulation to guarantee the needs of the MCS 5042

•More flexibility to regulate water temperature in order to reduce the potential for condensation

The use of building chilled water for the MCS 5042 unit is possible under certain conditions. However, consult with a qualified facilities design expert to determine whether this approach is possible within your specific data center. Refer to the requirements for water quality, temperature, and flow rate described in this section. Regardless of chilled water service approach, consult with a qualified facilities design expert to analyze new and existing systems and specify new work to insure water quality, temperature and water flow requirements can be met. The new work must meet all local safety and building code requirements as well as the customer’s facility quality standards. Piping drawings and schematics included here are diagrammatic to convey a conceptual understanding of the MCS 5042 connection requirements.

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