HP Modular Cooling System Options User Manual
Page 44
Cooling performance parameter settings 44
IMPORTANT:
Temperature Control Manual mode is for service and troubleshooting only and is
not to be used in a production environment.
Parameter
Function
Temperature
Control
Used in Auto mode to determine if the MCS 5042 unit
operates in Auto mode or Manual mode
Fan Speed Target Used in Manual mode to increase or decrease the fan
speed
Water Valve
Used in Manual mode to vary the opening percentage of
the water valve in Manual mode
Delta Temperature
for Minimum Fan
Speed
Used in Auto mode to set the maximum delta temperature
when the Minimum Fan Speed will be used
Delta Temperature
for Maximum Fan
Speed
Used in Auto mode to set the minimum delta temperature
when the Maximum Fan Speed will be used
Cooling Liquid
Heat Capacity
(Cw) Value
Used in Auto mode to calculate the energy extracted by
the air to water heat exchanger unit (This value for pure
water is 4,187 Ws/kgK and can be a lower value if
additives are included in the water.)
Dewpoint
Monitoring
Used in Auto mode to determine if the inlet water
temperature is below the dew point, which might result in
excessive condensation
Delta temperature (Server Intake Temp/Server Exhaust Temp)
Delta temperature is calculated from the temperature difference between the server intake temperature and
server exhaust temperature. The server intake temperature, or cold air, is the air coming from the heat
exchanger unit and pushed through the fan units. The server exhaust temperature, or hot air, is the air coming
from the fan units and being pushed through the heat exchanger unit.
Example
Server intake
temperature
Server exhaust
temperature
Top
24.5°C (76.1°F)
38.8°C (101.8°F)
Middle
24.8°C (76.6°F)
39.1°C (102.4°F)
Bottom
25.1°C (77.2°F)
40.3°C (104.5°F)
Average
24.8°C (76.6°F)
39.4°C (102.9°F)
Adjusting the cooling air flow provided by the MCS unit
To adjust the cooling air flow provided by the MCS unit while in Temperature Control Auto mode:
1.
2.
Click the Advanced tab.
3.
Enter a Delta Temperature For Minimum Fan Speed.
4.
Enter a Delta Temperature For Maximum Fan Speed.