HP Performance Optimized Data Center (POD) 240a manual AHU theory of operation, Adiabatic media

Page 62

Item

Component

Description

 

 

 

4

Filter box

Louvers and dampers provide an outside air inlet of each Adiabatic unit. If the

 

 

outside air temperature and humidity conditions are within the correct range of

 

 

the operating envelope, the dampers open automatically when the AHU is

 

 

powered on.

 

 

 

5

Power disconnect

The main power supply switch for each Adiabatic unit

 

switch

 

6

Electrical controls box

Houses the electrical controls and components

*Use the lifting eyes on top of the unit to lift the Adiabatic unit. Do not lift the Adiabatic unit with the lifting eyes installed on the filter box.

Adiabatic media

Each Adiabatic unit contains three Adiabatic media, each with its own solenoid water supply valve. An outside source of water must be provided to saturate the media.

HP recommends potable water as the main water source for the media.

AHU theory of operation

Damper operation

Each Adiabatic unit is equipped with louvered dampers that control the airflow through the unit. To control the environment inside of the HP POD 240e NA, the dampers work together to humidify dry outside air, as needed.

An external source of water must be provided to saturate the evaporative media. When the HP POD 240e NA begins operation, the supplied water is pumped through the pipes and out of the nozzles from the reservoir to the top of the evaporative media where it passes through spray nozzles onto the top of the evaporative media. The air that is pulled in through the media by the POD fans is now conditioned.

The controller sends an analog output signal to operate the outside air damper (1) by modulating it. Next, the bypass damper (2), the isolation damper (3), and the hot aisle return damper (4) are controlled to optimize the balance of outside air with humidified air in order to maintain the conditions in the IT section. The

AHU system 62

Image 62
Contents Abstract Part Number November EditionPage Contents HP POD 240e NA optional components Power feeder pull boxes Air filter sensorRegulatory compliance notices Before you contact HP HP contact informationOverview Operator safetyComponent safety Before you beginEnvironmental considerations Preventative maintenanceFire detection Component identification Structural component identificationParts and part number identification Component DescriptionLife safety component identification Exit sign locationsComponent identification Component identification Main breaker locations Electrical power component identificationEnd view shown Component Description Reminds you that the electrical panels must only be End view shown Callout Electrical safety label Description Electrical power disconnect map label locationControl cabinet component identification UPSSecurity component identification IT section B control cabinet Component DescriptionRacks Top view shown Component DescriptionEPO system Life safety systemsLife safety overview ECS touchscreen and EPO indicators EPO modes Battery backup during an EPO eventComponent Indicator color Description EPO accidental activationManual fire pulls Fire detection systemVesda air sampling smoke detection system Fire detection sequence of operations Fire alarm panelFire alarm indicators Emergency egress Site electrical system Power, electrical, and controlsPower safety Grounding and bondingCapacities Lightning protectionPower feeders Electrical panel labelsPower distribution electrical busway system Power distribution Adiabatic systemPanel schedules Wire color codeEnd view shown Feature Specification Wire color Description Electrical buswaysPage Rack power Drop boxesFeature Specification LightingEnvironmental control system overview Using the ECSEnvironmental control system Satellite control boxes Facility connections to the ECSComponents of the ECS Connecting to the ECS through the demarcation box Connecting to the ECS through connection portalsManaging the ECS from the HP POD 240e NA Configuring the ECS Environmental control system Logging in remotely to the ECS Locating the ECS IP address Click ConnectPassword protected Navigating the ECS interfaceTop screen Logging in to the ECS touchscreenView Callout Icon name DescriptionCA RH AD detail screen Information displayed DescriptionAisle in relation to the external ambient Alarm displayed Description Charts screenAD detail screen displays the following alarm conditions Operation displayed DescriptionPsychrometric chart Alarms chart Electrical Cabinets screenControls Network screen Alarms screen Stats screen Indicates the cold aisle combination temperature Configure Control settingsHMI settings Managing the ECS system Setting the Min and Max temperature and RH setpointsSetting the Min and Max range for alarms US Customary o MetricForcing an alarm Setting the offset alarmSetting the IP address Temperature and pressure sensors Maintaining the ECS parametersCallout Sensor Quantity per Description IT section Callout Sensor Quantity per Description Hot aisle Adiabatic unitsControlling the hot aisle fans Adiabatic components AHU systemOverview AHU theory of operation Adiabatic mediaAHU system AHU system Static pressure control Connection portals IT networking and communicationsNetworking Demarcation box Fire box Adding a phoneIT networking and communications Standard components Air filter sensorHP POD 240e NA optional components Power feeder pull boxesOptional components Rack specifications SpecificationsGeneral specifications Features SpecificationsEnvironmental specifications Preparing the Adiabatic units for winter MaintenancePeriodic maintenance Component Description Supply header gravity drain Adiabatic unit by unit blowdown Supply header blowdown Power up checklist Power up procedureStandard power up procedure Standard power up procedureCold weather power up procedure ElectricalCold weather power up checklist Cold weather operation Power down procedure Full power down procedureHP contact information Contacting HPBefore you contact HP HP POD 240e NA regulatory compliance Safety and NEC complianceRegulatory compliance notices Safety and regulatory compliance Warranty informationGlossary Programmable logic controller Power distribution unitNorth American Outside air Performance-Optimized DatacenterUninterruptible power system Power usage efficiency Relative humidityEnclosure of sufficient size to enable entry of personnel Pounds per square inchDocumentation feedback Index Index Safety, component Safety, power connections Warranty Winterize, Hvac units 74 wire color code
Related manuals
Manual 8 pages 155 b Manual 26 pages 60.09 Kb Manual 39 pages 18.56 Kb