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Johnson Controls VA-9070 Series Technical Bulletin

Johnson Controls VA-9070 Series Technical Bulletin

Electric rotary actuators for two-position and modulating service
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VA-9070 Series Electric Rotary Actuators for
Two-Position and Modulating Service
Technical Bulletin
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Internal and External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mechanical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Manual Override Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pre-installation Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Multiple Actuator (Parallel) Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setup and Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Travel Switches and Manual Travel Stop Adjustments . . . . . . . . . . . . . . . . . . . . . 9
Closed Travel Switch and Travel Stop Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Open Travel Switch and Travel Stop Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Input Control Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Servo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
External Feedback Potentiometer for Actuators without Servos . . . . . . . . . . . . . . . . . . . . . 11
Contents of the Feedback Potentiometer Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting the Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Actuator Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Servo Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating
Code No. LIT-977325
Issued August 15, 2014
Service Technical Bulletin
1

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Summary of Contents for Johnson Controls VA-9070 Series

  • Page 1: Table Of Contents

    Servo Troubleshooting ........... 14 VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating...
  • Page 2 Appendix B ............36 VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 3: Introduction

    VF5000 Series Butterfly Valves. Operating speeds vary between 6 and 60 seconds. Internal and External Components The VA-9070 Series actuator is divided into two internal sections: the power center below the switch plate and the control center above the switch plate. The power center contains the capacitor and gear motor, with its spur gear train.

  • Page 4: Manual Override Operation

    2. Place the proper sleeve adaptor (if required) onto the valve stem. Apply a small amount of grease to the sleeve adaptor to ease assembly. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 5: Wiring

    If the square-head conduit plug degrades, replace it with a metal plug. Figure 1 shows typical field wiring for a two-position actuator, whereas Figure 2 shows typical field wiring for a modulating actuator. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 6 Yellow or N.O. YELLOW Black Only CLOSE HEATER N.C. N.O. Close BLUE AUX CLOSE Open Ground Ground Figure 1: Typical Wiring Diagram of VA-9070 Series Two-Position Electric Rotary Actuator VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 7 Deadband Close Speed Open Speed Figure 2: Typical Wiring Diagram of VA-9070 Series Modulating Electric Rotary Actuator VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 8: Multiple Actuator (Parallel) Wiring

    Multiple Actuator (Parallel) Wiring Use a multiple pole switch to connect two VA-9070 Series electric actuators. See the Correct Wiring schematic in Figure 3. Do not connect more than one actuator to a Single-Pole, Double-Throw (SPDT) switch. In the actuator, voltage is present on the non-powered motor winding (opposite to the powered motor winding).

  • Page 9: Electrical Travel Switches And Manual Travel Stop Adjustments

    5. With the travel switch in the closed position, rotate the handwheel one-half turn CW, then turn the closed travel stop CW until it stops against the output gear. Lock the travel stop bolts. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 10: Open Travel Switch And Travel Stop Adjustment

    Status LED resumes flashing at the normal rate. • If the Status LED alternately flashes red, then flashes green, the calibration has failed. To resolve the problem, see the Servo Troubleshooting section. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 11: Accessories

    (such as when a servo is installed and an external feedback potentiometer is also required), you must make modifications to the switch plate - including locating, drilling, and tapping two new mounting holes. Consult the local Bray representative for instructions. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 12: Contents Of The Feedback Potentiometer Kit

    Figure 6: Installing the Feedback Potentiometer 4. Move the wiring from the six-point strip to the new terminal strip, reconnecting the wiring in the same positions. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 13: Setting The Potentiometer

    Override pin is corroded or damaged. Clean and check for smooth operation of handwheel does not the override switch pin. shut off motor. Override switch is damaged. Replace switch. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 14: Servo Troubleshooting

    Whenever the LED flashes red, the servo does not operate. The servo uses sequences of flashes to give troubleshooting indications. See Table 3. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 15: Green Led

    The LED flash rate interval (the time to completely cycle the LED from Off to On) is 1/2 second, except for Normal Operation mode, which is 1 second. Green LED A flashing green LED provides status and warning information. The servo operates normally in this state. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 16 During a calibration, the LED flashes rapidly at one-half second Process intervals. When the calibration is complete, the LED resumes with the Normal Operation flash code (Code 1) unless another warning is still pending. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 17: Red Led

    Bray representative for assistance. Calibration Error This flash code is displayed after a failed calibration for 3 seconds. See Code 2 and Code 3 in Table 4 for more information. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 18: Disassembly And Assembly

    Wrench, 3/4 in. (19 mm) [15/16 in. (8 mm) for VA907A and VA-907B] Motor Mount Socket-Head Shoulder Bolt Hex Key, 5/32 in. (4 mm) Motor Mount Socket-Head Cap Screws Hex Key, 3/16 in. (5 mm) VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 19: Procedure For Va-9072 Actuators

    1. Disconnect all power to the actuator and remove the cover. See Figure 7. Figure 7: Two-Position Actuator with Cover Removed 2. Disconnect the motor wires from the main terminal block (motor close, motor open, and neutral). VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 20 3. Remove the switch plate by unscrewing the seven Phillips mounting screws. The switch plate should lift out as an assembly with the camshaft attached. See Figure 8 and Figure 9. Figure 8: Removing the Switch Plate (Two-Position Actuator) VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 21 4. Disassemble the switch plate. See Figure 9. Figure 9: Disassemble the Switch Plate (Modulating Actuator) VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 22 (two lower and one upper). See Figure 10. 6. Vertically remove the gear motor out of the actuator. See Figure 10. Do not misplace the alignment pin. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 23 Note: A spring pin holds the handwheel in place. Further disassembly of the actuator requires special tools and procedures and is not covered in this document. The reassembly procedure is the opposite of the disassembly procedure. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 24: Procedure For Va-9075, Va-9076, Va-9077, Va-9078, Va-907A, And Va-907B Actuators

    Figure 12: Two-Position Actuator with Cover Removed 2. Remove the field wiring and the internal motor wiring from the terminal strips. See Figure 13. Figure 13: Removing the Switch Plate (Two Position Actuator) VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 25 3. Remove the switch plate by unscrewing the seven Phillips-head mounting screws and then pull up on the switch plate to remove it. See Figure 14. Figure 14: Two-Position Actuator with Switch Plate Removed VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 26 VA-907B Series Actuators have four lower mounting screws, one upper mounting screw, and one lower locating screw. 6. Remove the motor vertically out of the actuator. See Figure 15. Note: Do not misplace the alignment pin. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 27 See Figure 16. Further disassembly of the actuator requires special tools and procedures and is not covered in this document. The reassembly procedure is the opposite of the disassembly procedure. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 28: Va-9072 Actuators

    Retaining Ring Items 23, 24, and 25 are installed when optional torque switches are required. Worm shaft spacers are used in units when torque switches are not required. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 29 Figure 17: VA-9072 Two-Position Actuators, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 30: Va-9075 Actuator

    Name Tag Items 23, 24, and 25 are installed when optional torque switches are required. Worm shaft spacers are used in units when torque switches are not required. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 31 Figure 18: VA-9075 Actuator VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

  • Page 32: Va-9076, Va-9077, Va-9078, Va-907A, And Va-907B Actuators

    Name Tag Items 23, 24, and 25 are installed when optional torque switches are required. Worm shaft spacers are used in units when torque switches are not required. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 33 Figure 19: VA-9076, VA-9077, and VA-9078 Two-Position Actuators, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 34 Figure 20: VA-907A Two-Position Actuators, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 35 Figure 21: VA-907B Two-Position Actuators, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
  • Page 36 507 E. Michigan Street, Milwaukee, WI 53202 Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc. All other marks herein are the marks of their respective owners. © 2014 Johnson Controls, Inc. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin Published in U.S.A.
  • Page 37 110 (10,000:1) (2,030) Y designates the speed. See Table 16. ZZ designates the voltage. See Table 17. Table 16: Speed Designations Sec = Table 17: Voltage Designations Voltage VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...

This manual is also suitable for:

Va-9072Va-9075Va-9076Va-9077Va-9078Va-907a ... Show all

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