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Siemens BACNET 125-5037 Owner's Manual

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Siemens BACnet
VAV Actuator
Owner's Manual
125-5037
Rev. AA, February 2008

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   Summary of Contents for Siemens BACNET 125-5037

  • Page 1

    Siemens BACnet VAV Actuator Owner’s Manual 125-5037 Rev. AA, February 2008...

  • Page 3

    Control devices are combined to make a system. Each control device is mechanical in nature and all mechanical components must be regularly serviced to optimize their operation. All Siemens Building Technologies branch offices and authorized distributors offer Technical Support Programs that will ensure your continuous, trouble-free system performance.

  • Page 5: Table Of Contents

    Sequencing Logic (optional) ... 6 Control Temperature Setpoints... 6 Day/Night Mode ... 6 Night Mode Override Switch ... 6 Control Loops ... 6 Calibration ... 7 Damper Status Operation ... 7 Siemens Building Technologies, Inc.            ...

  • Page 6

    Using the Controller as a Point Extension Device ... 19                                                                 Siemens Building Technologies, Inc.

  • Page 7

    Preventive Maintenance ... 29 Safety Features ... 30 Controller LEDs... 30 Automated Checkout ... 30 Glossary ... 33 Overview ... 33 Index ... 37 Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual              ...

  • Page 9: How To Use This Manual

    How To Use This Manual This manual is written for the owner and user of Siemens Building Technologies BACnet VAV Actuator. It is designed to help you become familiar with the Siemens BACnet VAV Actuator and its applications. This section covers manual organization, manual conventions, symbols used in the manual, and other information that will help you use this manual.

  • Page 10: Manual Conventions

    Notation WARNING: CAUTION: Getting Help For more information about the BACnet VAV Actuator, contact your local Siemens Building Technologies, Inc. representative. Where To Send Comments Your feedback is important to us. If you have comments about this manual, please submit them to SBT_technical.editor.us.sbt@siemens.com.

  • Page 11: Product Overview

    Product Overview Introduction The BACnet VAV Actuator is the Siemens Building Technologies, Inc. FLN controller used in pressure independent Variable Air Volume applications (Figure 1). It provides Direct Digital Control (DDC) for eight applications, and can operate independently as a stand-alone DDC room controller or networked with a field panel. The controller provides all input/output, system, and local communication connections.

  • Page 12: Hardware Inputs

    • Room temperature setpoint dial (optional) Digital • Night mode override (optional) • Wall switch (optional) Hardware Outputs Analog • None BACnet Connection Figure 1. Siemens BACnet VAV Actuator. Status/DO LEDs Airflow Pickup Tubes Application 2561 Siemens Building Technologies, Inc.

  • Page 13: Digital

    “C” (Common) and “H” (Hot) on the terminal block labeled “24 VAC”. No earth ground connection is required (Figure 2). Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Application 2560, 2561, 2562, 2563...

  • Page 14: Communication Wiring

    Indicates, when flashing, that the controller is receiving information from the field panel. Indicates, when flashing ON and OFF once per second, that the controller is functioning properly. Note: = System Common 120 ohm ½ W Wirenut Siemens Building Technologies, Inc.

  • Page 15: Duct Temperature Sensor

    Duct Temperature Sensor An optional duct temperature sensor provides duct air temperature sensing inputs to the controller. For more information about temperature sensors, contact your local Siemens Building Technologies, Inc. representative. Related Equipment • Autozero Module (optional) 540-200 • Relay Module •...

  • Page 16: Applications

    Control Loops Temperature Loop – Heating Loop – Cooling Loop – maintain temperature setpoint by changing the flow setpoint or modulating the heat source (valve/electric heat). Flow Loop – maintains flow setpoint by modulating the damper actuator. Siemens Building Technologies, Inc.

  • Page 17: Calibration

    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. Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual...

  • Page 18: Hot Water Reheat

    Notes 1. If the temperature swings in the room are excessive or if there is trouble in maintaining the setpoint, contact your local Siemens Building Technologies, Inc. representative for more information. 2. The BACnet VAV Actuator, as shipped from the factory, keeps all associated equipment OFF.

  • Page 19: Application 2560 Vav Cooling Only

    3 to 5 Straight Duct Diameters required for proper sensor reading Supply Air Velocity Sensor Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Supply Air Damper Spare DO or Autozero Module (Opt.) Spare DOs "COMMON" Termination for all DOs...

  • Page 20: Application 2561 Vav Cooling Or Heating

    Supply Air Damper Spare DO or Autozero Module (Opt.) Spare DOs "COMMON" Termination for all DOs Hi/Lo Tubing Connections Figure 6. Application 2561 Control Drawing. SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) BACnet Actuator Controller Siemens Building Technologies, Inc.

  • Page 21: Application 2562 Vav With Electric Reheat Or Baseboard Radiation

    The electric heat stages will be disabled (turned off) when the electric heat airflow is less than the defined minimum. CAUTION: Do not set EHEAT FLOW (the defined minimum) to less than 5%; otherwise, the electric heat interlock will be disabled. Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual...

  • Page 22

    Autozero Module (Opt.) 2-Position Spare DOs Valve "COMMON" Termination for all DOs Hi/Lo Tubing Connections SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) BACnet Actuator Controller SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) BACnet Actuator Controller Siemens Building Technologies, Inc.

  • Page 23: Application 2563 Vav With Hot Water Reheat

    Supply Air Velocity Sensor Figure 9. Application 2563 Control Drawing (HW Heat and Spare DO). Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Supply Air Damper Spare DO or Autozero Module (Opt.) Valve...

  • Page 24

    Sensor Figure 10. Application 2563 Control Drawing (Two Valve Actuators). Supply Air Damper Valve Actuator Valve Actuator "COMMON" Termination for all DOs Hi/Lo Tubing Connections BACnet Actuator Siemens Building Technologies, Inc. SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) Controller...

  • Page 25: Application 2564 Vav Series Fan Powered With Electric Reheat

    In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating or cooling is required. Recirculated Plenum Air Supply Air 3 to 5 Straight Duct Diameters required for proper sensor reading Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Recirculated Air Damper Velocity Sensor Supply Air Damper Elec Heat...

  • Page 26: Application 2565 Vav Series Fan Powered With Hot Water Reheat

    Air Damper Velocity Sensor Supply Air Damper Valve Spare DO Actuator "COMMON" Termination for all DOs Hi/Lo Tubing Connections Figure 12. Application 2565 Control Drawing. SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) BACnet Actuator Controller Siemens Building Technologies, Inc.

  • Page 27: Application 2566 Vav Parallel Fan Powered With Electric Reheat

    The fan turns on when heating is required. Recirculated Plenum Air Supply Air 3 to 5 Straight Duct Diameters required for proper sensor reading Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Recirculated Air Damper Velocity Sensor Supply Air Damper...

  • Page 28: Application 2567 Vav Parallel Fan Powered With Hot Water Reheat

    Air Damper Velocity Sensor Supply Air Damper Valve Spare DO Actuator "COMMON" Termination for all DOs Hi/Lo Tubing Connections Figure 14. Application 2567 Control Drawing. SAFETIES OTHERS Modulating Damper Actuator Wall Switch (Opt.) BACnet Actuator Controller Siemens Building Technologies, Inc.

  • Page 29: Application 2597 Slave Mode

    1. Set MTR SETUP to 1 to enable the motor. 2. Unbundle MTR1 COMD at the field panel to command the motor from the field panel. Contact your local Siemens Building Technologies, Inc. representative for other combinations of DOs and motors.

  • Page 30: Point Database

    DAY CLG STPT NGT CLG STPT DAY HTG STPT NGT HTG STPT RM STPT MIN Siemens Building Technologies, Inc. Application Identifies the controller on the FLN trunk. Identification number of the program running in the controller. Compensates for deviations between the value of ROOM TEMP and the actual room temperature.

  • Page 31

    WALL SWITCH DI OVRD SW {19} OVRD TIME Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Application All except 2597 The maximum temperature setpoint in degrees that the controller can use from the setpoint dial. This overrides any temperature setpoint from the setpoint dial that falls above this maximum.

  • Page 32

    Day temperature setpoints will be used in day mode. Night temperature setpoints will be used in night mode. This point is normally set by the field panel. 2564 This point is present, but not used in this application. Description Siemens Building Technologies, Inc.

  • Page 33

    DO 2 {42} DO 3 {43} HEAT STAGE 1 {43} Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Application 2566, When flow rises above this value, the parallel fan 2567 will turn OFF. All except 2597 The minimum amount of air in CFM (LPS) to be supplied to the space in cooling mode.

  • Page 34

    The value to which the valve actuator is commanded in percent of full travel for applications using a water valve. 2563 The value to which the valve 1 actuator is commanded in percent of full travel for applications using a water valve. Description Siemens Building Technologies, Inc.

  • Page 35

    CLG D GAIN CHK OUT HTG P GAIN Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Application 2560, 2561, 2597 The current position of the Motor 2 actuator in percent of full travel (for use as an auxiliary slave point).

  • Page 36

    The value, in percent, which the heating loop must exceed for the electric heat to be ON for the full duty cycle (STAGE TIME). 2565, 2567 The valve must be opened greater than this value before the fan will turn ON. Description Siemens Building Technologies, Inc.

  • Page 37

    CTL STPT {92} FLOW STPT {93} Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual Application 2562, 2564, 2566 The value, in percent, which the heating loop must go below for the electric heat to be OFF for the full duty cycle (STAGE TIME).

  • Page 38

    The time, in seconds, between control loop 2597 calculations. The status code indicating any errors detected during controller power up. A status of 0 indicates there are no problems. Description (.002 m ) through 6.375 ft (.5923 Siemens Building Technologies, Inc.

  • Page 39: Troubleshooting

    This chapter describes corrective measures you can take should you encounter a problem when using a BACnet VAV Actuator. You are not required to do any controller troubleshooting. You may want to contact your local Siemens Building Technologies representative if a problem occurs or you have any questions about the controller. NOTE: When troubleshooting, record what the problem is and what actions were performed immediately before the problem occurred.

  • Page 40: Safety Features

    Room temperature sensor failed. Room setpoint dial failed [If STPT DIAL is set to YES]. Air velocity sensor failed. Controller could not reach CLG FLOW MIN or below. Controller could not reach CLG FLOW MAX or above. Siemens Building Technologies, Inc.

  • Page 41

    BACnet VAV Actuator and check whether communication is possible. If so, the problem lies in the room temperature sensor or its cable. If not, the problem is with the controller. 3. Contact your local Siemens Building Technologies representative. Room setpoint dial failed—CHK STATUS = 2 1.

  • Page 42

    • MTR1 TIMING • DMPR ROT ANG 6. The box may not have been balanced correctly. Contact your local Siemens Building Technologies Representative. 7. The air velocity sensor may need calibration. Set CAL AIR to YES to run the calibration sequence.

  • Page 43: Glossary

    Volume Controller’s internal air velocity transducer without changing the volume of air being delivered to a space. centralized control Type of control offered by a controller that is connected by means of Field Level Network (FLN). Cubic Feet per Minute. Siemens Building Technologies, Inc.

  • Page 44

    A device containing a microprocessor for centralized control of system components and equipment controllers. Field Level Network. Network consisting of equipment controllers, FLN end devices, fume hoods, etc. Liters per Second. loopout Output of the control loop expressed as a percentage. Siemens Building Technologies, Inc.

  • Page 45: Override Switch

    Default application that displays when power is first applied to an equipment controller. No control action is initiated in the slave mode. stand-alone control Type of control offered by a controller that is providing independent DDC control to a space. Siemens Building Technologies, Inc. Siemens BACnet VAV Actuator Owner’s Manual...

  • Page 46

    Glossary Terminal Equipment Controller Siemens Building Technologies, Inc. product family of equipment controllers (one is the BACnet VAV Controller - Electronic Output) that house the applications software used to control terminal units, such as heat pumps, VAV terminal boxes, fan coil units, unit ventilators, etc.

  • Page 47: Index

    ... 18 Application 2567 fan operation ... 18 Application 2597 overview ... 19 Siemens Building Technologies, Inc. using auxiliary points ... 19 using controller as point extension device ... 19 applications calibration ... 7, 23 control loops ... 6 control temperature setpoints ...

  • Page 48

    RTS ... 4 troubleshooting ... 29 basic service information... 29 TX LED ... 30 U  units, English ... 34 V  valve 2-position heating ... 3, 7, 23 W  wiring communication wiring ... 4 power wiring ... 3 Siemens Building Technologies, Inc.

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