Siemens 125-5050 owner manual Insert TEC2564CD

Page 20

Chapter 2 – Applications

[insert TEC2564CD]

Application 2865 VAV Series Fan Powered with Hot Water Reheat

In Application 2865, the controller modulates the supply air damper of the terminal box for cooling and modulates a hot water valve for heating. When in heating, the terminal box either maintains minimum airflow or modulates the supply air damper. Application 2865 has a series fan for air circulation. In order for the terminal box to work properly, the central air-handling unit must provide supply air.

See the following figure.

Fan Operation

CAUTION

On series fan powered terminal boxes, the terminal box fan must be controlled/interlocked to start either before or at the same time as the central air handler. Failure to do so may cause the terminal box fan to rotate backwards and cause consequent damage at start up.

In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating or cooling is required.

Application 2866 VAV Parallel Fan Powered with Electric Reheat

In Application 2866, the controller modulates the supply air damper of the terminal box for cooling and controls stages of electric reheat for heating. When in heating, the terminal box either maintains minimum airflow or modulates the supply air damper. Application 2866 has a parallel fan that re-circulates the room air. In order for the terminal box to work properly, the central air-handling unit must provide supply air.

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Siemens Industry, Inc.

BACnet ATEC Owner's Manaul

125-5050, Rev. AA

4/20/2010

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Contents Siemens BACnet Atec Siemens Industry, IncPage FCC Regulations Service StatementCopyright Notice To the Reader CreditsTable of contents Using the Controller as a Point Extension Device Manual Conventions How To Use This ManualManual Organization Getting Help Manual SymbolsWhere to Send Comments Product Overview Ordering NotesBACnet Atec Electronic Output Applications Application DescriptionHardware Inputs Hardware OutputsAnalog DigitalPower Wiring ApplicationCommunication Wiring Controller LED IndicatorsController LEDs IndicationTemperature Sensors Room Temperature SensorDuct Temperature Sensor Related EquipmentApplications Basic OperationHeating and Cooling Switchover CalibrationDamper Status Operation Fail-safe OperationElectric Reheat Modulate Damper During Heating Mode optionalHot Water Reheat Application 2860 VAV Cooling Only Application 2861 VAV Cooling or HeatingElectric Heat Interlock Application 2863 VAV with Hot Water ReheatBaseboard Radiation Application 2864 VAV Series Fan Powered with Electric Reheat Fan OperationInsert TEC2564CD Insert TEC2566CD Application 2897 Slave Mode Using Auxiliary PointsUsing the Controller as a Point Extension Device Insert TEC2567CDApplications Point Database Descriptor Address Application DescriptionDescriptor Address1 Descriptor Address1 Application Description MTR Setup VLV POSVLV1 POS MTR2 TimingSwitch Limit Switch TimeFlow CTL Flow MINSwitch Dband CAL SetupCAL Timer SetupPreventive Maintenance Chaper 4 TroubleshootingBasic Service Information Safety Features Controller LEDsGlossary Override switch Field panelLps LoopoutSlave mode Stand-alone controlTerminal Equipment Controller UnbundleIndex Duct temperature sensor, 15 RTS Index Communication wiring Wiring Power wiring 125-5050, Rev. AA
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