Johnson Controls VA-9070 Series Service manual

1VA-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 Service
Technical Bulletin Code No. LIT-977325
Issued August 15, 2014

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin2
Green LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Red LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Disassembly and Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Procedure for VA-9072 Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Procedure for VA-9075, VA-9076, VA-9077, VA-9078, VA-907A, and VA-907B Actuators 24
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
VA-9072 Actuators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
VA-9075 Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
VA-9076, VA-9077, VA-9078, VA-907A, and VA-907B Actuators . . . . . . . . . . . . . . . . . . 32
Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin 3
VA-9070 Series Electric Rotary Actuators for
Two-Position and Modulating Service Technical
Bulletin
Introduction
The VA-9070 Series (Bray® Series 70) are quarter-turn, electric rotary actuators
with manual override, designed for use on most Johnson Controls® VF Series
Butterfly Valves sized for up to 18,000 lb·in (2034 N·m) of torque.
VA-9070 Series electric actuators cannot be used on the VF4000 Series and
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. The power
center drives a final non-backdriveable worm gear output. The power center also
houses an override mechanism for manual operation. The control center has
several user-accessible components: the camshaft assembly, limit switches,
terminal strips, torque switches, heater, and servo.
On the outside of the actuator housing are adjustable mechanical travel stops, a
large position indicator, the manual override handwheel, and dual conduit entry
ports. The external coating is a polyester powder coat, providing resistance to
Ultraviolet (UV) radiation exposure and chemical exposure.
Electrical Operation
The motor in the VA-9070 Series actuator is a permanent induction split capacitor
design (single phase AC power). Travel limit switches are mechanical Form C
Single-Pole, Double-Throw (SPDT) switches with two independent circuits. These
SPDT switches are rated at 10 amperes (75 to 80% power factor), 1/2 hp 125 VAC,
and 3/4 hp 250 VAC.
If the torque capacity of the actuator is exceeded to the point where the motor stalls
and overheats, a thermal protector switch built into the motor windings
automatically disconnects the motor power. Once the motor cools sufficiently, the
thermal switch resets.
Mechanical Operation
Mechanically, the ratio of the gear motor determines the speed of the actuator. The
gear motor uses high-efficiency spur gears with different ratios for the different
speeds. Initial gear reduction through the spur gears transfers to the worm shaft.
The final gear reduction and output happens through a non-backdriveable worm
gear set. An indicator-camshaft linked to the output shaft determines positioning.
The manual override drives the worm shaft when engaged.

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin4
Manual Override Operation
The manual override operates similarly to the adjusting knob on a mechanical
wristwatch. To engage the manual override, pull the handwheel to its outermost
position. When the manual override engages, the actuator stops electrical
operation.
A yellow position indicator provides visual indication that the manual override is
engaged. Dry contacts on an internal switch can provide remote electrical
indication of the override status.
Spring plungers hold the two handwheel positions (engaged and disengaged) in
place. The handwheel remains in position until physically moved. Rotating the
handwheel in a clockwise direction rotates the output shaft in the same clockwise
(closed) direction. Rotating the handwheel in a counterclockwise direction rotates
the output shaft in the same counterclockwise (open) direction.
Pre-installation Storage
A temporary conduit entry plug, installed in shipped actuators, prevents foreign
matter from entering the actuator. Store the actuator properly in a dry,
temperature-controlled area to prevent moisture from entering through this
temporary plug. Replace the temporary conduit plug with a permanent conduit
plug if the actuator is stored for a long period of time or stored in adverse
conditions. Prevent condensation from forming by maintaining a near constant
external temperature and supplying power to the heater internal to the actuator.
Installation
Mounting
VA-9070 Series electric actuators are suitable for direct mounting on
Johnson Controls VF Series Butterfly Valves. VA-9070 Series Electric Actuators
cannot be used on the VF4000 and VF5000 Series Butterfly Valves. Installing the
VA-9070 Series actuator onto other quarter-turn valves or devices requires proper
mounting hardware.
When mounting the actuator in the standard position, orient the actuator with its
handwheel in a vertical plane and parallel to the pipeline. When mounting the
actuator on a vertical pipe, position the actuator with the conduit entries on the
bottom to prevent condensation from entering the actuator by way of the conduit.
In all cases, position the conduit to prevent drainage into the actuator.
Mount the actuator to the valve using the following procedure:
1. Manually operate the actuator until the output shaft of the actuator lines up
with the valve stem. If possible, use an intermediate position, such as valve
disc/stem and actuator half-open.
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 5
3. Install the furnished mounting studs by threading them all the way into the
actuator base. Insert the short, threaded length into the actuator.
4. Mount the actuator onto the valve stem. Be sure the mounting studs are
properly aligned with the holes in the top plate of the valve or the mounting
bracket. If necessary, manually override the actuator to align the mounting
studs with the mounting holes.
5. Lower the actuator onto the valve and secure it tightly in place with the
furnished hex nuts and lock washers.
Wiring
Connect the actuator to field wiring:
1. Remove the metal conduit plug for the power connection. Each actuator has
two conduit entries (one for power and one for control).
2. Terminate all field wiring at the actuator terminal strip in accordance with the
wiring diagrams attached to the inside of the actuator cover.
Note: The terminal strip accepts wire sizes ranging from 10 to 22 AWG
(12 to 22 AWG for the servo). Do not use wire smaller than 18 AWG.
Note: The motor full load current is noted on the nameplate of the actuator.
Note: The heaters use approximately 0.5 amperes at 110 volts.
3. Properly seal the conduit connections to maintain the weatherproofed integrity
of the actuator enclosure.
Note: The square-head conduit plug is weatherproofed but may eventually
degrade. 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 Bulletin6
Figure 1: Typical Wiring Diagram of VA-9070 Series Two-Position Electric Rotary
Actuator
RED
RED
BLUE
BLUE
A
B
C
D
CLOSE N.O.
(VOLTAGE FREE)
OPEN N.O.
(VOLTAGE FREE)
COM
COM
COM
N.O.
N.O.
N.O.
N.O.
N.O.
N.C.
N.C.
N.C.
N.C.
N.C.
AUX OPEN
OPEN
GREEN
CAM
RED
CAM
COM
CLOSE
AUX CLOSE
OVERRIDE SW
COM
1
2
3
4
5
6
7
8
9
YELLOW
BLUE
BLUE
BLUE
RED
RED
RED
YELLOW
HEATER
Ground Ground
Open
Close
For Heater
Only
Close
Open
Neutral
120 VAC Blue
Red
Yellow or
Black
OC
N
Motor
FIG:977319_Fig2

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin 7
Figure 2: Typical Wiring Diagram of VA-9070 Series Modulating Electric
Rotary Actuator
Calibrate Status
Input (-)
Input (+) +5 VOLTS
Output (-)
Output (+)
Motor Close
Motor Open
Neutral
Line Neutral
Line Power
Com
+5 Common
CB OPEN
CB CLOSE
Common
Handwheel
Common
OP Torque CL Torque
Common
Close Limit
Open Limit
HTR
+5 VDC at 50 mA
(If Required)
-
-
+
+
Neutral
120 VAC
Ground
Outgoing
Feedback
Signal
1,2
Single
Phase
Supply
Heater
Incoming
Command
Signal
1
FIG:fldwrng
FUSE
Open Speed
Close Speed
Deadband
ON
12345678910
A
B
C D
WHT
BLK
WHT -
ORN
GRY +
Feedback Potentiometer
Green
Cam
Red Cam
N.O.
N.O.
Com
Com
Com
Com
Com
N.O.
N.O.
N.O.
N.C.
N.C.
N.C.
Manual Override Switch
Torque Switch
CLOSE
OPEN
BLU
RED
YLW
or BLK
OC
N
Motor
YLW
YLW
BLU
BLU N.C.
N.C.
RED
RED
4-20 mA 4-20 mA
0-5 V 0-5 V
0-10 V 0-10 V
2-10 V
ON ON
ON
ON
ON
ON ON
ON
ON ON
ON ON
ON
ONOFF OFF
OFF OFF
OFF
OFF
OFF OFF
OFF
OFF OFF
OFF
OFF OFF OFF
Switch Switch
Switch Switch
Switch
Switch
COMMAND INPUT COMMAND OUTPUT
14
25
36
REVERSE
ACTING
FORWARD
ACTING
FAIL
DISABLE FAIL
ENABLE
FAIL
CLOSE FAIL
OPEN
TORQUE SW
ENABLE TORQUE S
W
DISABLE
9
10
7
8
1 - Isolate the command signal and the feedback signal from each other and any other circuits. 2 - The servo powers the feedback loop. Do not supply external power.
ORN
ORN
PRP
PRP

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin8
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). Connecting the voltage-containing,
non-powered motor winding to another voltage-containing, non-powered motor
winding interferes with the motor performance. See the Incorrect Wiring
schematic in Figure 3.
Setup and Adjustment
To set up and adjust the actuator, use the following procedure:
1. Set up and adjust the electrical travel switches and manual travel stops. See the
Electrical Travel Switches and Manual Travel Stop Adjustments section in this
document.
2. Set the input control signal. See the Setting the Input Control Signal section in
this document.
3. Set the potentiometer. See the Setting the Potentiometer section in this
document.
4. Set the servo. See the Setting the Servo section in this document.
Figure 3: Correct and Incorrect Wiring Schematics
Neutral Live
Open
Open
Motor Motor
Close
Close
DPDT
Switch
Field
Wiring
Actuator A Actuator B
Neutral
Live
Open
Open
Motor Motor
Close
Close
Field
Wiring
SPDT
Switch
Actuator A
Actuator B
Correct Wiring Incorrect Wiring
FIG: wir_crrct_incrrct

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin 9
Electrical Travel Switches and Manual Travel Stop Adjustments
You must set the electrical travel switches to trigger prior to reaching the
mechanical travel stops. The travel switches are labeled for open and close. The
cams are color-coded (green for open; red for closed).
Manual travel stops are designed to prevent manual overtravel, not to stall the
electric motor. The travel stops have an adjustment range of approximately
10 degrees.
Closed Travel Switch and Travel Stop Adjustment
1. Loosen the mechanical stop for the closed position and back it off so that it
does not interfere with actuator travel. The closed stop is located on the right
when viewed from the travel stop side of the actuator.
2. Remove the indicator rotor by pulling it up. This action exposes the machined
groove on the end of the camshaft, which is the reference for the valve disc
position.
3. Manually operate the actuator handwheel Clockwise (CW) until the valve
reaches the desired closed position.
4. Rotate the red adjusting knob (by hand or with a flat-head screwdriver) until
the cam lobe barely trips the switch from a CW direction.
Note: If the rotation of one cam moves the other cam, hold the other knobs or
cams during adjustment.
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.
Figure 4: Setting the Travel Limit Switches
FIG:set_lim

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin10
Open Travel Switch and Travel Stop Adjustment
Manually operate the actuator handwheel Counterclockwise (CCW) until the valve
is fully open. Follow the same procedure as outlined in the Closed Travel Switch
and Travel Stop Adjustment section, except use the green cam (open) and the
travel stop located on the left side (as seen when viewed from the travel stop side
of the actuator).
Setting the Input Control Signal
Set the input control signal for the input type used.
See Figure 2 for the location of the input control signal switches.
Setting the Potentiometer
1. Manually operate the actuator handwheel until the unit is in the fully closed
position.
2. Rotate the black potentiometer drive gear adjustment knob to barely engage the
potentiometer gear segment at the closed position.
3. Manually operate the actuator to the fully open position.
4. Fine-tune the potentiometer adjustment at this end to equalize the difference
between the ends. The potentiometer gear segment should maintain
engagement with the drive gear throughout full actuator travel.
Setting the Servo
1. Wire the input signal to the incoming command signal terminals. Ensure that
you maintain proper polarity when making wiring connections.
2. Connect the power supply and activate the actuator.
3. Check the Status Light-Emitting Diode (LED).
• If the red Status LED is flashing, see the Servo Troubleshooting section.
• If the green Status LED is flashing, press and hold the CALIBRATE button
until the green Status LED flashes rapidly (approximately 2 seconds), then
release the CALIBRATE button. The servo drives the valve to the open and
close travel limit switch settings. When the calibration is complete, the
green 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.
Table 1: Input Control Signal Switch Settings
Switch Input Signal
4-20 mA DC 0 to 5 V DC 0 to 10 V DC 2 to 10 V
1OFFONONON
2OFF OFF ON ON
3OFF OFF OFF ON