Siemens 125-5050 Modulate Damper During Heating Mode optional, Hot Water Reheat, Electric Reheat

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Chapter 2 – Applications

Modulate Damper During Heating Mode (optional)

CAUTION

If the damper is set to modulate in heating mode, make sure the controller is in the appropriate mode for the current supply air temperature.

Applications that have a heating source (valve/electric) can be configured to modulate the flow setpoint in sequence with the heating source.

Hot Water Reheat

CAUTION

Do not set HTG FLOW MIN to 0 cfm (0 lps). A minimum airflow should be provided across the heating coils when the heating valve is open.

When the controller is in cooling mode, the heating valve(s) are closed.

The heating loop modulates the heating valve(s) to warm up the room. In cooling mode, the heating valve is closed.

Electric Reheat

CAUTION

Verify that the equipment is supplied with safeties by others to ensure that there is airflow across the heating coils when they are to be energized.

The heating loop controls up to three stages of electric reheat to warm up the room. The electric reheat is time modulated using a duty cycle. When the controller is in cooling mode, the electric heat is OFF at all times.

Notes

1.If the temperature swings in the room are excessive or if there is trouble in maintaining the setpoint, contact your local Siemens Industry representative for more information.

2.The BACnet ATEC, as shipped from the factory, keeps all associated equipment OFF. The controller and its equipment are released to application control at start-up.

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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 Copyright Notice Service StatementFCC Regulations To the Reader CreditsTable 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 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 OperationHot Water Reheat Modulate Damper During Heating Mode optionalElectric Reheat Application 2860 VAV Cooling Only Application 2861 VAV Cooling or HeatingBaseboard Radiation Application 2863 VAV with Hot Water ReheatElectric Heat Interlock 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 SetupBasic Service Information Chaper 4 TroubleshootingPreventive Maintenance 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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