HP Performance Optimized Data Center (POD) 240a Static pressure control

The HP POD 240e NA is equipped with 10 exhaust fans that remove heated air from the hot aisle. The exhaust fans feature an integrated monitoring function to protect the motor and electronics against damage from jamming, phase loss, or overheating.

If any of the following failure conditions occur, the motor automatically stops and an alarm is signaled:

•Locked rotor

•Low main supply voltage

•Loss of a phase

•Over-heating of the exhaust fan electronics

•Over-heating of the exhaust fan motor

For more information about the exhaust fan, see the HP Performance Optimized Datacenter 240e NA Maintenance and Service Guide.

Side view shown

Static pressure control

The control of static pressure is used to be sure that the airflow from the cold aisle of the IT sections across the rack and into the hot aisle of the HP POD 240e NA remains constant. The pressure in the hot aisle is controlled to external ambient pressure, and the IT sections are slightly higher than the external ambient pressure.

The static pressure is controlled to a default parameter of 0.1 in H2O above external ambient pressure in the cold aisle, which cannot be adjusted by a customer.

AHU system 65

Contents

HP Performance Optimized Datacenter 240e North America (Adiabatic) User Guide Page Contents Page Page Overview Before you begin Operator safety Component safety Fire detection Preventative maintenance Environmental considerations Component identification Structural component identification Parts and part number identification Life safety component identification Page Page Electrical power component identification Page Page Control cabinet component identification Security component identification Racks Life safety systems Life safety overview EPO system ECS touchscreen and EPO indicators EPO modes EPO accidental activation Battery backup during an EPO event Fire detection system VESDA air sampling smoke detection system Manual fire pulls Fire alarm panel Fire detection sequence of operations Fire alarm indicators Emergency egress Power, electrical, and controls Site electrical system Power safety Grounding and bonding Grounding Capacities Power feeders Electrical panel labels Power distribution: electrical busway system Power distribution: Adiabatic system Panel schedules Wire color code Electrical busways Page Drop boxes Rack power Lighting Environmental control system Environmental control system overview Using the ECS Components of the ECS Satellite control boxes Facility connections to the ECS Connecting to the ECS through the demarcation box Connecting to the ECS through connection portals Managing the ECS from the HP POD 240e NA Configuring the ECS Page Logging in remotely to the ECS Locating the ECS IP address Password protected Navigating the ECS interface Logging in to the ECS touchscreen View Top screen Page AD detail screen Page Charts screen Psychrometric chart Readings chart Electrical Cabinets screen Controls Network screen Alarms screen Stats screen Page Configure Control settings HMI settings Managing the ECS system Setting the Min and Max temperature and RH setpoints Setting the Min and Max range for alarms Setting the offset alarm Setting the IP address Forcing an alarm Maintaining the ECS parameters Temperature and pressure sensors Page Adiabatic units Controlling the hot aisle fans AHU system Overview Adiabatic components Adiabatic media AHU theory of operation Page Page Static pressure control IT networking and communications Networking Connection portals Demarcation box Fire box Adding a phone Page Standard components Air filter sensor Optional components HP POD 240e NA optional components Power feeder pull boxes Specifications General specifications Rack specifications Environmental specifications Maintenance Periodic maintenance Preparing the Adiabatic units for winter Page Supply header gravity drain Adiabatic unit by unit blowdown Supply header blowdown Power up procedure Standard power up procedure Power up checklist Standard power up procedure Cold weather power up procedure Cold weather power up checklist Cold weather operation Power down procedure Full power down procedure Contacting HP Before you contact HP HP contact information Regulatory compliance notices HP POD 240e NA regulatory compliance Safety and NEC compliance Safety and regulatory compliance Warranty information Glossary labeled listed PDU PLC POD PSI PUE structure UPS VESDA Documentation feedback Index