Carrier VVT Bypass II Installation And Startup Manual
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Carrier VVT Bypass II Installation And Startup Manual

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CARRIER CORPORATION ©2019
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-601-01 · 1/25/2019
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Summary of Contents for Carrier VVT Bypass II

  • Page 1 CARRIER CORPORATION ©2019 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-601-01 · 1/25/2019...
  • Page 2 Verify that you have the most current version of this document from www.hvacpartners.com or your local Carrier office. Important changes are listed in Document revision history at the end of this document. CARRIER CORPORATION ©2019. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier...

  • Page 3: Table Of Contents

    Field-supplied hardware ............................6 Mounting the VVT Bypass II ..........................7 To mount the controller and actuator ....................7 Wiring the VVT Bypass II for power ......................... 12 To wire the controller for power ......................13 Addressing the VVT Bypass II ........................... 14 Wiring for communications ..........................
  • Page 4 Contents Appendix A: VVT Bypass II Points/Properties ......................40 Status................................... 40 Unit Configuration .............................. 40 Maintenance ............................... 42 Alarms ................................. 43 Linkage ................................43 I/O Points ................................44 Appendix B: BACnet points list ..........................45 Document revision history ............................46...

  • Page 5: Introduction

    The system's bypass damper The controller's damper actuator provides 45 in/lbs (5 Nm) of torque. If the actuator's torque is insufficient, the VVT Bypass II can be used to drive an external high-torque actuator. Or, the controller can drive multiple external damper actuators.
  • Page 6 Introduction NOTE This document gives instructions for field-installation of a VVT Bypass II in an i-Vu® Control System. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 7: Specifications

    Actuator Belimo brushless DC motor, torque 45 inch-pounds (5 Nm), runtime 154 seconds Act Net port To connect the actuator cable and the VVT Bypass II BACnet port For communication with the controller network using BACnet ARC156 (156 kbps) or BACnet MS/TP (9600 bps – 76.8 kbps)
  • Page 8 Profile as defined in ANSI/ASHRAE Standard 135-2012 (BACnet) Annex L, Protocol Revision 9 Listed by UL-916 (PAZX), cUL-916 (PAZX7), FCC Part 15-Subpart B, Class B, CE VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 9: Safety Considerations

    Disconnect all power to the unit before performing maintenance or service. Unit may automatically start if power is not disconnected. WARNING Follow all local, state, and federal laws regarding disposal of equipment containing hazardous materials such as mercury contactors. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 10: Installing The Vvt Bypass Ii

    Set the controller's address (page 14). Wire the controller to the BACnet MS/TP or BACnet ARC156 network (page 14). Wire the inputs and outputs (page 16). Field-supplied hardware Each VVT Bypass II installation requires the following field-supplied components: • damper •...

  • Page 11: Mounting The Vvt Bypass Ii

    Installing the VVT Bypass II Mounting the VVT Bypass II Mount the VVT Bypass II on the bypass duct damper actuator shaft. For service access, allow at least 1 foot (.3 m) of clearance between the front of the controller and adjacent surfaces.
  • Page 12 Installing the VVT Bypass II Disconnect the actuator from the controller by inserting a screw driver in the slot on the back of the VVT Bypass II and pressing the tab. The actuator cable or an attached extension cable must connect to the controller's Act Net port.
  • Page 13 Center the bushing in the slot. Failure to do so may cause the actuator to stick or bind. ○ The VVT Bypass II must be secured, but loose enough to allow movement. of the damper shaft. ○ VVT Bypass II Controller CARRIER CORPORATION ©2019...
  • Page 14 Installing the VVT Bypass II CAUTIONS You must use the screws, anti-rotation slot's bushings, and o-rings that are shipped with the VVT Bypass ○ Overtightening the screws so that the controller and actuator cannot move may damage the unit. ○...
  • Page 15 Installing the VVT Bypass II Hold down the actuator damper release button and rotate the damper from fully closed to fully open. If the damper traveled less than 90 degrees, do the following to set the actuator's fully open position: Loosen the appropriate stop clamp screw.

  • Page 16: Wiring The Vvt Bypass Ii For Power

    WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals. CAUTIONS • The VVT Bypass II is powered by a Class 2 power source. Take appropriate isolation measures when mounting it in a control panel where non-Class 2 circuits are present. •...

  • Page 17: To Wire The Controller For Power

    Connect the transformer wires to the screw terminal connector. Apply power to the power supply. Measure the voltage at the VVT Bypass II’s power input terminals to verify that the voltage is within the operating range of 21.6–26.4 Vac. Connect a 4-inch (10.2 cm) wire from Gnd to the control panel.

  • Page 18: Addressing The Vvt Bypass Ii

    Installing the VVT Bypass II Addressing the VVT Bypass II You must give the VVT Bypass II an address that is unique on the network. You can address the VVT Bypass II before or after you wire it for power.

  • Page 19: To Wire The Controller To The Bacnet Network

    NOTE Use the same baud rate for all controllers on the network segment. If the VVT Bypass II is at either end of a network segment, connect a BT485 to the VVT Bypass II. Insert the power screw terminal connector into the VVT Bypass II's power terminals.

  • Page 20: Wiring Inputs And Outputs

    Wiring a Duct Air Temperature sensor to an input Part #33ZCSENDAT The VVT Bypass II must be connected to a Duct Air Temperature (DAT) sensor that monitors the temperature of the air delivered by the air source. NOTE This document gives instructions for wiring the sensor to the VVT Bypass II. For mounting and wiring the sensor, see the Carrier Sensors Installation Guide.

  • Page 21: Wiring Field-Supplied Actuators To The Analog Output

    Wiring field-supplied actuators to the analog output You can wire a high-torque actuator or parallel actuators to the controller's 0–10 Vdc analog output. NOTE You cannot use the VVT Bypass II's actuator if wiring external actuator(s) to the analog output. VVT Bypass II Controller CARRIER CORPORATION ©2019...
  • Page 22 Installing the VVT Bypass II High-torque actuators You can wire one of the following Belimo actuators to the VVT Bypass II's analog output instead of using the controller's 45 in.-lb (5 Nm) actuator. NMX24-MFT P-10028 90 in.-lb (10 Nm) actuator with 0–10 Vdc control and 0–10 Vdc...
  • Page 23 Installing the VVT Bypass II Linked actuators You can wire up to 4 of the following Belimo actuators to the VVT Bypass II's analog output. Link actuators whose travel times and other parameters coincide. LMX24-MFT P-10028 45 in.-lb (5 Nm) actuator with 0–10 Vdc control NMX24-MFT P-10028 90 in.-lb (10 Nm) actuator with 0–10 Vdc control...

  • Page 24: Wiring And Mounting The Equipment Touch To The Rnet Port

    Partially cut, then bend and pull off the outer jacket of the cable. Do not nick the inner insulation. Strip about .25 inch (.6 cm) of the inner insulation from each wire. Wire the VVT Bypass II's Rnet+ and Rnet- terminals to the terminals of the same name on the Equipment Touch's connector.

  • Page 25: Wiring The Truvu™ Et Display To The Rnet Port

    Wire the TruVu™ ET Display 24V DC connector to the 24 Vdc power supply using 2-conductor 18 AWG wire. Maximum distance 100 feet (30 meters). CAUTION The TruVu™ ET Display can share a power supply with the Carrier controller as long as: •...

  • Page 26: Start-Up

    Configuring the VVT Bypass II's properties To start up the VVT Bypass II, you must configure certain points and properties. Appendix A (page 40) is a complete list of all the points and properties, with descriptions, defaults, and ranges. These properties affect the unit operation and/or control.

  • Page 27: Performing System Checkout

    Performing system checkout Bypass damper Verify the VVT Bypass II is securely fastened to the bypass damper shaft and duct work. Verify duct air temperature sensor is installed at the inlet of the damper or in the air source supply duct upstream of the bypass damper connection.

  • Page 28: Variable Frequency Drive (Vfd)

    Pressure are not locked and that Target Damper Position is >0% and <100%. You may have to adjust the Duct Static Pressure Setpoint slightly to get the damper within this range. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide...
  • Page 29 • In the i-Vu® or Field Assistant tree, select the RTU Open controller. Go to Properties > Control Program > Configuration > Service Configuration > Service Test, then disable Service Test and Fan Test. Make sure all other outputs under Service Test are disabled. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide...

  • Page 30: Sequence Of Operation

    Duct static pressure control The VVT Bypass II modulates a bypass damper or VFD to maintain the static pressure in the supply duct of the pressure-dependent VVT system. The VVT Bypass II has a damper actuator that provides 45 in./lbs (5 Nm) of torque.

  • Page 31: Equipment Fan Off Detection

    Heating SAT or below the configured Minimum Cooling SAT for more than 5 minutes. Airside linkage When the VVT Bypass II is part of a linked system, it uses data received through Linkage (equipment SAT and mode) to detect excessive leaving air temperature (LAT) conditions at the equipment and equipment operating mode.

  • Page 32: Air Source Mode Determination

    Vent Damper Position or the Minimum Cooling Damper Position as the minimum during the VENT mode. See the air source’s installation manual for more specific operation. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide...

  • Page 33: To Adjust The Driver Properties

    Use the following if you want to change the driver's properties in the i-Vu® interface. On the i-Vu® navigation tree, right-click the VVT Bypass II and select Driver Properties. Make changes as needed on the Properties page for Driver and any of its children.

  • Page 34: Device

    • VVT Bypass II network communication Configuration NOTE The three APDU fields refer to all networks over which the VVT Bypass II communicates. Max Masters and Max Info Apply only if the VVT Bypass II is on an MS/TP network.

  • Page 35: Notification Classes

    Select to have a device continue sending an alarm message until it receives delivery confirmation from the recipient. Notifications Transitions to Send Uncheck the types of alarms you do not want the recipient to get. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 36: Calendars

    Template Enable Clear these checkboxes to disable Alarm or Return to normal messages of this type from this controller. Notification Class Do not change this field. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 37: Specific Events

    Do not change this field. Switches, Jumpers, Options The Switches, Jumpers, Options page shows the current physical settings on the VVT Bypass II. Flow Calibration Archive The Flow Calibration Archive page shows measured flow and sensor readings that were entered in the i-Vu®...

  • Page 38: Act Net Network Details

    NOTE See To get the Carrier VVT Bypass II serial number (page 36) for the controller serial number. The Act Net network shows the VVT Bypass II’s actuator has Address 1.

  • Page 39: Troubleshooting

    NOTE To help you troubleshoot, obtain a Module Status (Modstat) from the controller and review the System Error and Warning details. LED's The LED's on the VVT Bypass II show the status of certain functions. Verify the LED patterns by cycling power to the controller and noting the lights and flashes. If this LED is on...

  • Page 40: To Get The Serial Number

    Replace the VVT Bypass II. To get the serial number If you need the VVT Bypass II's serial number when troubleshooting, the number is on a Module Status report (Modstat) under Core (or Main) board hardware To obtain a modstat in the i-Vu® interface: Select the VVT Bypass II in the navigation tree.

  • Page 41: To Replace The Battery

    Troubleshooting To replace the battery If the VVT Bypass II experiences a power outage and the control program stops functioning, replace the battery. You need to replace the battery if the voltage measures below 2.9 volts when the controller is not powered.
  • Page 42 Press the air can's trigger twice for no more than 2 seconds each time. Reconnect tubing to the High and Low flow sensor tubes. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide...

  • Page 43: Compliance

    BACnet Compliance Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of BACnet International. BTL ® is a registered trademark of BACnet International. VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 44: Appendix A: Vvt Bypass Ii Points/Properties

    Appendix A: VVT Bypass II Points/Properties Appendix A: VVT Bypass II Points/Properties NOTE Engineering units shown in this document in the defaults and ranges are strictly for reference. You must enter an integer only. Status Navigation: i-Vu® / Field Assistant:...
  • Page 45 Appendix A: VVT Bypass II Points/Properties Point Name/Description Default/Range Maximum Heating SAT – The value that the SAT must exceed to cause the static 120°F (48.9°C) pressure setpoint to be set to the LAT Duct Static Pressure Setpoint. This is also the 40 to 180°F...

  • Page 46: Maintenance

    Appendix A: VVT Bypass II Points/Properties Point Name/Description Default/Range Test and Balance Zero Cal – Closes the bypass damper and waits for the air source to go to the Off mode before zeroing out the static pressure sensor. This does not occur if the static pressure is >...

  • Page 47: Alarms

    Appendix A: VVT Bypass II Points/Properties Alarms Navigation: i-Vu® / Field Assistant: Properties Control Program Alarms > > Point Name/Description Range Supply Air Temperature Alarm – Indicates if the supply air temperature exceeds the Normal/Alarm high temperature alarm limit or drops below the low temperature alarm limit.

  • Page 48: I/O Points

    Appendix A: VVT Bypass II Points/Properties I/O Points Navigation: i-Vu® / Field Assistant: Properties I/O Points > Point Name/Description Range Pressure Input – The current duct static pressure of the controller's integrated airflow 0 to 2.0 in. H sensor. (0 to .498 kPa SAT Sensor –...

  • Page 49: Appendix B: Bacnet Points List

    2=Warmup 3=Heat 4=Cool Air Source Mode link_ahu_mode 5=Freecool 6=Pressure 7=Evac 8=Vent 0=Normal Airside Linkage Alarm air_linkage_fail BV:7030 1=Alarm Supply Air Temperature 0=Normal sat_alarm BV:7004 Alarm 1=Alarm VVT Bypass II Controller CARRIER CORPORATION ©2019 Installation and Start-up Guide All rights reserved...

  • Page 50: Document Revision History

    Mounting the VVT Bypass II > To mount Added caution stating that you must use the bushing, O-ring, and X-H-RE-E-CC-JS the controller and actuator screws that are shipped with the VVT Bypass II, along with applicable graphic. 8/28/18 Wiring the TruVu™ ET Display to the New topic.
  • Page 52 CARRIER CORPORATION ©2019 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-601-01 · 1/25/2019...

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