Siemens 125-5050 Application 2864 VAV Series Fan Powered with Electric Reheat, Fan Operation

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Chapter 2 – Applications

Application 2864 VAV Series Fan Powered with Electric Reheat

In Application 2864, 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 2864 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.
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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 Industry, Inc Siemens BACnet AtecPage Copyright Notice Service StatementFCC Regulations Credits To the ReaderTable of contents Using the Controller as a Point Extension Device Manual Organization How To Use This ManualManual Conventions Where to Send Comments Manual SymbolsGetting Help Application Description Product OverviewOrdering Notes BACnet Atec Electronic Output ApplicationsDigital Hardware InputsHardware Outputs AnalogApplication Power WiringIndication Communication WiringController LED Indicators Controller LEDsRelated Equipment Temperature SensorsRoom Temperature Sensor Duct Temperature SensorBasic Operation ApplicationsFail-safe Operation Heating and Cooling SwitchoverCalibration Damper Status OperationHot Water Reheat Modulate Damper During Heating Mode optionalElectric Reheat Application 2861 VAV Cooling or Heating Application 2860 VAV Cooling OnlyBaseboard Radiation Application 2863 VAV with Hot Water ReheatElectric Heat Interlock Fan Operation Application 2864 VAV Series Fan Powered with Electric ReheatInsert TEC2564CD Insert TEC2566CD Insert TEC2567CD Application 2897 Slave ModeUsing Auxiliary Points Using the Controller as a Point Extension DeviceApplications Descriptor Address Application Description Point DatabaseDescriptor Address1 Descriptor Address1 Application Description MTR2 Timing MTR SetupVLV POS VLV1 POSCTL Flow MIN Switch LimitSwitch Time FlowSetup Switch DbandCAL Setup CAL TimerBasic Service Information Chaper 4 TroubleshootingPreventive Maintenance Controller LEDs Safety FeaturesGlossary Loopout Override switchField panel LpsUnbundle Slave modeStand-alone control Terminal Equipment ControllerIndex Duct temperature sensor, 15 RTS Index Communication wiring Wiring Power wiring 125-5050, Rev. AA