HP Performance Optimized Data Center (POD) 240a User Manual
AHU system 63
isolation damper (3) is used to isolate the dry side of the Adiabatic unit from the wet side during cold weather
operation.
Below freezing damper operation
The isolation damper (3) is completely closed, so that sub freezing air cannot get to the wet media. The
The isolation damper (3) is completely closed, so that sub freezing air cannot get to the wet media. The
bypass damper (2) is completely open, enabling a path for the cold, dry air to enter the IT sections. The
outside air damper (1) and hot aisle return damper (4) moderate to maintain a set temperature within the IT
sections.
If the humidity within the HP POD 240e NA gets too low, water is added to the media to maintain the low RH
sections.
If the humidity within the HP POD 240e NA gets too low, water is added to the media to maintain the low RH
humidity parameter, unless the ECS is set to Allow Low RH.
For more information on winterizing the HVAC/ Adiabatic units, see "Preparing the HVAC units for winter."
Side view shown
For more information on winterizing the HVAC/ Adiabatic units, see "Preparing the HVAC units for winter."
Side view shown
Economizer without additional cooling requirements