User's Manual

Environmental control system 60
Callout Sensor Quantity per
hot aisle
Description
1
Temperature sensors 3
•
Monitor the temperature in various locations
throughout the hot aisle of the HP POD 240e
NA
•
Report data to the ECS
2
Hot aisle pressure sensor
probes
12
•
Monitor and report hot aisle pressure
•
Report data to the AHU controllers
3
Hot aisle temperature sensor
probes
12
•
Monitor and report hot aisle temperature
•
Report data to the AHU controllers
Outdoor air sensors
There is one sensor mounted on each Adiabatic unit that monitors the temperature and humidity of the
outdoor air. Each sensor reports the data to the AHU controller.
Adiabatic units
Each IT section of the HP POD 240e NA has six Adiabatic units that maintain the differential pressure and
temperature parameters within the HP POD 240e NA.
For more information about the required power for the Adiabatic units, see "Power distribution: Adiabatic
system (on page 28)."
Controlling the hot aisle fans
There are 10 exhaust fans located in the hot aisle of the HP POD 240e NA.
Side view shown
The HP POD 240e NA fans operate at variable speeds (0-100%) to maintain predetermined parameters
programmed into the AHU. For more information about the fan mode, see "AHU theory of operation (on
page 62)".