Johnson Controls VA-9070 Series Technical Bulletin
Electric rotary actuators for two-position and modulating service
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Also See for VA-9070 Series:
- Technical bulletin (44 pages) ,
- Manual (34 pages) ,
- Installation instructions (2 pages)
Table of Contents
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setup and Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Travel Switches and Manual Travel Stop Adjustments . . . . . . . . . . . . . . . . . . . . . 8
Setting Travel Limit Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Calibrating the Servo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
External Feedback Potentiometer for Actuators without Servos . . . . . . . . . . . . . . . . . . . . . 10
Contents of the Feedback Potentiometer Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting the Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Actuator Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Servo Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Red LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Disassembly and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating
Code No. LIT-977325
Issued May 2018
Service Technical Bulletin
1
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Table of Contents
Troubleshooting
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Summary of Contents for Johnson Controls VA-9070 Series
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Page 1: Table Of Contents
Disassembly and Assembly ..........17 VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating... - Page 2 Appendix B ............35 VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
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Page 3: Va-9070 Series Electric Rotary Actuators For
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. The power center drives a final non-backdriveable worm gear output. -
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 22 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 Only Black 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 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...
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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 1. 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
1. Remove the indicator rotor by pulling away from the indicator shaft as shown in Figure 4. 2. Manually operate the actuator clockwise until the valve reaches the desired closed position. VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin... -
Page 10: Setting The Potentiometer
Upon completion of the autocalibration sequence, the product settings’ indicators return to normal. 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 Johnson Controls 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
Servo NXT in manual or autocalibration Check the indicators for manual or mode autocalibration mode Servo NXT is incorrectly wired Verify wire connections against the wiring diagram VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin... - Page 15 This means the servo will operate, but it may not be a perfect match to the actuator. If this happens, recalibrate the servo as soon as possible. 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...
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Page 17: Red Led
Johnson Controls 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 3 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 7 and Figure 8. 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...
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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 Travel Stop Bolt Removable Switch Plate Worm Shaft Terminal Strip Marker Override Drive Pin Terminal Strip Spring Plunger Terminal Block Screw Manual Override Shaft Hub Aux Open/Closed Limit Switches 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...
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Page 30: Va-9075 Actuator
Terminal Strip Travel Stop Bolt Terminal Block Screw Worm Shaft Ground Terminal Washer Override Drive Pin Ground Terminal Screw Spring Pin Torque Switch Cover Aux Open/Closed Limit Switches VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin... - Page 31 VA-9075 Actuator Figure 18: VA-9075 Actuator VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
- Page 32 Travel Stop Bolt Terminal Block Screw Worm Shaft Switch Plate Override Drive Pin Switch Plate Mounting Screw Manual Override Shaft Hub Torque Switch Cover Aux Open/Closed Limit Switches 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 Switch Plate Spring Pin Terminal Strip Marker Spring Plunger Terminal Strip Manual Override Shaft Stub Terminal Block Screw Manual Override Sleeve Cam Assembly O-Ring Bushing O-Ring Retaining Ring VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
- Page 35 Figure 20: VA-907A and VA-907B Two-Position Actuators, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
- Page 36 Bolt, Hex, Hd Cover Washer, Conical Actuator/Gear Box Fastening Screw Output Gear Bearing Idler/Input Gear Bearing Cover Gasket Input Gear Output Gear Idler Gear Cover Lock Washer Base Fastening Screw VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
- Page 37 Figure 21: VA-907A and VA-907B 3:1 Gear Box, Exploded View VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin...
- Page 38 507 E. Michigan Street, Milwaukee, WI 53202 Metasys® and Johnson Controls® are registered trademarks of Johnson Controls All other marks herein are the marks of their respective owners. © 2014 Johnson Controls VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin Published in U.S.A.
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