HP Modular Cooling System - Manual (Page 43)

Cooling performance parameter settings 43
Cooling performance parameter settings
Cooling performance parameter settings overview
The MCS unit has several cooling performance parameter settings. These settings control the fan speed
and water flow to meet the cooling needs of the rack-mounted components.
The temperature of the server intake air is controlled by varying the opening percentage of the water
valve inside the MCS unit. When the server intake air temperature is above the Server Intake Temperature
Set Point, the opening percentage of the water valve increases. When the server intake air temperature is
below the Server Intake Temperature Set Point, the opening percentage of the water valve decreases.
The level of speed for each fan unit is controlled through the control system using the server intake and
server exhaust temperatures.
Parameter Function
Server Intake
Temperature Set
Point
Used to control the desired air temperature going into
the front of the servers
High Temperature
Threshold
Used to issue a Critical alarm if the high temperature
threshold temperature is exceeded
Warning
Temperature
Threshold
Used to issue a warning if the warning temperature
threshold temperature is exceeded
Low Temperature
Threshold Used to issue a warning if the low temperature threshold
temperature is exceeded