HP Modular Cooling System Generation 2 site preparation guide - Technical white paper

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Table 11: Minimum heat load at different water supply and server air intake temperatures
Server air intake temperature
Water supply temperature
Minimum heat load
20°C (68ºF)
7.5°C (45.5ºF)
8 kW
10°C (50ºF)
7 kW
12.5°C (54.5ºF)
5 kW
15°C (59ºF)
4 kW
25°C (77ºF)
7.5°C (45.5ºF)
12 kW
10°C (50ºF)
9 kW
12.5°C (54.5ºF)
7 kW
15°C (59ºF)
6 kW
Note:
Not providing the minimum heat load can cause unstable control of the
temperatures and flow rates of the HP MCS G2.
Consult with your HP representative for further information.
The charts in figures 27 and 28 offer a guideline for determining the approximate amount of heat that
can be removed from HP MCS G2 single and dual rack configurations based on 20°C (68°F) and
25°C (77°F) server intake air temperatures (in degrees Celsius) and flow rates (in liters per minute
[lpm] or gallons per minute [gpm]) being delivered to the unit.
Note:
The term ―water‖ in the following charts refers to the coolant described in
the section ―Water quality requirements.‖