IBM 8408-44E, Site And Hardware Planning

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Water specifications for the secondary cooling loop
Important: The water that is being supplied to the heat exchanger must meet the requirements that are
described in this section. Otherwise, system failures might occur over time as a result of any of the
following problems:
v Leaks due to corrosion and pitting of the metal components of the heat exchanger or of the
water-supply system.
v Buildup of scale deposits inside the heat exchanger, which can cause the following problems:
– A reduction in the ability of the heat exchanger to cool the air that is exhausted from the rack
Figure 33. Typical performance of the heat exchanger, 30 kW heat load
Figure 34. Pressure drop (standard units)
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Site and hardware planning