HP Performance Optimized Data Center (POD) 240a manual AHU system

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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 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 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

Economizer without additional cooling requirements

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Contents Part Number November Edition AbstractPage Contents Air filter sensor HP POD 240e NA optional components Power feeder pull boxesBefore you contact HP HP contact information Regulatory compliance noticesBefore you begin Operator safetyComponent safety OverviewPreventative maintenance Fire detectionEnvironmental considerations Structural component identification Component identificationComponent Description Parts and part number identificationExit sign locations Life safety component identificationComponent identification Component identification Electrical power component identification End view shown Component DescriptionMain breaker locations Reminds you that the electrical panels must only be Electrical power disconnect map label location End view shown Callout Electrical safety label DescriptionUPS Control cabinet component identificationIT section B control cabinet Component Description Security component identificationTop view shown Component Description RacksLife safety systems Life safety overviewEPO system ECS touchscreen and EPO indicators EPO accidental activation Battery backup during an EPO eventComponent Indicator color Description EPO modesFire detection system Vesda air sampling smoke detection systemManual fire pulls Fire alarm panel Fire alarm indicatorsFire detection sequence of operations Emergency egress Grounding and bonding Power, electrical, and controlsPower safety Site electrical systemLightning protection CapacitiesElectrical panel labels Power feedersPower distribution Adiabatic system Power distribution electrical busway systemWire color code End view shown Feature SpecificationPanel schedules Electrical busways Wire color DescriptionPage Drop boxes Rack powerLighting Feature SpecificationUsing the ECS Environmental control systemEnvironmental control system overview Facility connections to the ECS Components of the ECSSatellite control boxes Connecting to the ECS through connection portals Connecting to the ECS through the demarcation boxManaging the ECS from the HP POD 240e NA Configuring the ECS Environmental control system Logging in remotely to the ECS Click Connect Locating the ECS IP addressNavigating the ECS interface Password protectedCallout Icon name Description Logging in to the ECS touchscreenView Top screenCA RH Information displayed Description AD detail screenAisle in relation to the external ambient Operation displayed Description Charts screenAD detail screen displays the following alarm conditions Alarm displayed DescriptionPsychrometric chart Electrical Cabinets screen Alarms chartControls Network screen Alarms screen Stats screen Indicates the cold aisle combination temperature Control settings ConfigureHMI settings US Customary o Metric Setting the Min and Max temperature and RH setpointsSetting the Min and Max range for alarms Managing the ECS systemSetting the offset alarm Setting the IP addressForcing an alarm Maintaining the ECS parameters Temperature and pressure sensorsCallout Sensor Quantity per Description IT section Adiabatic units Controlling the hot aisle fansCallout Sensor Quantity per Description Hot aisle AHU system OverviewAdiabatic components Adiabatic media AHU theory of operationAHU system AHU system Static pressure control IT networking and communications NetworkingConnection portals Demarcation box Adding a phone Fire boxIT networking and communications Air filter sensor Standard componentsPower feeder pull boxes Optional componentsHP POD 240e NA optional components Features Specifications SpecificationsGeneral specifications Rack specificationsEnvironmental specifications Maintenance Periodic maintenancePreparing the Adiabatic units for winter Component Description Supply header gravity drain Adiabatic unit by unit blowdown Supply header blowdown Standard power up procedure Power up procedureStandard power up procedure Power up checklistElectrical Cold weather power up procedureCold weather power up checklist Cold weather operation Full power down procedure Power down procedureContacting HP Before you contact HPHP contact information Safety and NEC compliance Regulatory compliance noticesHP POD 240e NA regulatory compliance Warranty information Safety and regulatory complianceGlossary Performance-Optimized Datacenter Power distribution unitNorth American Outside air Programmable logic controllerPounds per square inch Power usage efficiency Relative humidityEnclosure of sufficient size to enable entry of personnel Uninterruptible power systemDocumentation feedback Index Index Warranty Winterize, Hvac units 74 wire color code Safety, component Safety, power connections
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