Johnson Controls VA-9070 Series Service manual

VA-9070 Series Electric Rotary Actuators
for Two-Position and Modulating Service
Technical Bulletin
Introduction
VA-9070 Series quarter-turn, electric rotary actuators with manual override can be used 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 six and sixty 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 120V motor in the VA-9070 Series actuator is a permanent induction split capacitor design
(single phase AC power). The 24VAC motor in the VA-9070 Series actuator is a permanent magnet-
brush D.C. motor. 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), 1/3 hp 120 VAC and 1/2 hp 220 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.
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 shows 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
VA-9070
977325
2023-04-12

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.
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
1. Connect the actuator to field wiring
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.
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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.
Wiring Diagrams
Shown below are the typical wiring diagrams for their respective applications
Figure 1: 120V on/off actuators
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Figure 2: 120 V proportional actuators
VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin4

Figure 3: 24V on/off actuators
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Figure 4: 24V proportional actuators
Multiple Actuator (Parallel) Wiring
Use a multiple pole switch to connect two VA-9070 Series electric actuators. See the Correct wiring
schematic in Figure 5.
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 5.
VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin6

Figure 5: Correct and incorrect wiring schematics
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 Electrical Travel
Switches and Manual Travel Stop Adjustments
2. Set the potentiometer. See Setting the Potentiometer.
3. Calibrate the servo. See Calibrating the Servo
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.
Figure 6: Setting the travel timit switches
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Setting Travel Limit Switches
If the unit came assembled to a valve, the switches have been factory-set and DO NOT need
adjustment. Johnson Controls uses cam design along with 2 SPDT mechanical switches to set the
open and closed position of the valve. The green cam actuates the open switch when the actuator
reaches the open position.
Similarly, the red cam actuates the ‘closed’ switch when the actuator reaches the ‘closed’ position.
Standard factory setting of the travel limit switches means 90° travel between open and close
positions. Cams for each switch are adjustable for applications where less than 90-degree travel is
desired between the open and closed positions.
Complete the following procedure to adjust the travel limit cams.
Note: For Housing Size 130, 180, ignore steps 1 and 10.
1. Remove the indicator rotor by pulling away from the indicator shaft as shown in Figure 6.
2. Manually operate the actuator clockwise until the valve reaches the desired closed position.
3. Loosen the cam locking screw shown in Figure 8.
Note: It is possible that the rotation of one cam may move the other cam. If this occurs,
hold the other knobs or cams during adjustment.
4. Rotate the red cam adjustment knob by hand or with a flat head screwdriver until the red cam
lobe just activates (depresses) the ‘closed’ switch from a clockwise direction.
Note: If fixed auxiliary switches are installed, the auxiliary cam activates prior to the main
cam.
5. Tighten the cam locking screw.
6. Manually operate the actuator counterclockwise until the valve reaches the desired open
position.
7. Loosen the cam locking screw.
8. Rotate the green cam adjustment knob until the green cam lobe activates (depresses) the open
switch from a counterclockwise direction.
9. Tighten the cam locking screw.
10. Place the indicator rotor back on the indicator shaft.
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.
Calibrating the Servo
Note: The Servo NXT is not remotely controllable during the autocalibration sequence. If
autocalibration needs to be aborted, pull the handwheel.
Autocalibration mode is entered by pressing and holding the Autocalibration button for at least
three seconds. Entering Autocalibration mode starts the autocalibration sequence: a series of
commands performed by Servo NXT on the actuator to determine the operating points. During
the autocalibration sequence, the Servo NXT should be monitored to ensure it operates correctly.
The product settings’ indicators change state to show that autocalibration has been entered, and
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continue to flash at the end of travel until autocalibration completes. Upon completion of the
autocalibration sequence, the product settings’ indicators return to normal.
If the fault indication lights illuminate during autocalibration, then the autocalibration sequence
could not be successfully completed. Refer to the troubleshooting section for more information.
No other operating modes can be entered during autocalibration, and entering autocalibration
mode overrides any previous mode of operation.
Accessories
External Feedback Potentiometer for Actuators without Servos
Potentiometers for external feedback are available for field installation on VA9072, VA-9073,
VA-9074, VA-9075, VA-9077, and VA-9078 actuators.
Figure 7: Potentiometer for VA-907x series actuators
Important: In special instances where dual potentiometers are required (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.
Contents of the Feedback Potentiometer Kit
• one potentiometer assembly
• two No. 6 cross-drive pan-head screws
• two No. 6 internal lock washers
• one 10-point terminal strip
• one terminal strip marker for auxiliary switches and/or feedback potentiometer
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• one small wiring diagram sticker for the additional potentiometer
Tools Required
For terminal wiring: 3/16 in. (5 mm) blade screwdriver
For potentiometer mounting screws: No. 2 Phillips screwdriver
Installation Procedure
1. Install the potentiometer next to the camshaft, use the two threaded holes provided.
2. Mount the potentiometer in the correct orientation with its gear centered so that it meshes
with the potentiometer drive gear.
3. Push the assembly towards the cam to mesh the potentiometer gears, and tighten the
mounting screws.
Figure 8: 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.
5. Wire the potentiometer to the terminal strip using the small stick-on wiring diagram
provided.
6. Adhere the wiring diagram sticker to the inside of the cover.
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.
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4. Fine-tune the potentiometer adjustment at this end to equalize the difference between
the ends. The potentiometer gear segment should remain engaged with the drive gear
throughout full actuator travel.
Troubleshooting Procedures
Actuator Troubleshooting
See the following table for actuator troubleshooting information.
Table 1: Actuator troubleshooting chart
Problem Possible Cause Solution
Override is engaged. Push handwheel in all the way.
Wiring is incorrect. Check wiring and power supply.
Actuator does not operate.
Actuator motor has reached its
thermal shutdown temperature
Allow time to cool.
Actuator operates in reverse
directions.
Field wiring is reversed. Rewire field wiring.
Limit switches trip. Readjust travel limit switches.
Mechanical travel stop is
stopping actuator.
Adjust mechanical travel stops.
Valve torque requirement is
higher than actuator output.
Manually override out of seat;
try angle seating or larger
actuator.
Optional torque switches
activating
Valve torque exceeds actuator
torque rating
- consult factory
Actuator does not fully close
valve or open valve
Voltage power supply is low. Check power source
Override pin is corroded or
damaged.
Clean and check for smooth
operation of the override
switch pin.
Engaging override handwheel
does not shut off motor.
Override switch is damaged. Replace switch.
Not completely disengaged. Push handwheel in as far as
possible so that no yellow
shows.
Override pin is damaged and/
or does not trigger switch.
Replace override pin.
Disengaging override
handwheel does not restart
motor.
Incorrect wiring of override
switch.
Check wiring.
Worm gear segment is not
meshing with worm.
Remove switch plate and
inspect; adjust travel stops to
prevent problem.
Motor runs but worm and
gear segment do not run.
Pin/Key on Worm/Motor drive
gear sheared.
Replace Pin/Key on drive gear.
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Table 1: Actuator troubleshooting chart
Problem Possible Cause Solution
Condensation forming. Test heater wiring; should have
constant power.
Corrosion inside actuator.
Water leaking in. Check all seals and possible
water entry
through conduit.
Servo Troubleshooting
Refer to the actuator manual before adjusting or replacing any actuator components. Before
testing or acting on any possible issues, check for any active faults.
WARNING
Risk of electric shock
Turn off all power and lockout/tag out service panel before installing or modifying any electrical wiring.
Table 2: Servo troubleshooting chart
Problem Possible Cause Solution
Fuse is blown Verify and replace fuse
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Servo NXT is not receiving
power
Test the Input Power
connection with a multimeter
or oscilloscope
Servo NXT does not turn on
when power is applied
Power is not correct Check the provided power
against the voltage listed for
the Servo NXT and actuator
Deadband is too narrow Increase the deadband settingActuator moves back and
forth near setpoint (hunting) Excessive noise on the signal
lines
Use an oscilloscope to test for
the presence of EMI.
Utilize EMI reducing techniques
to mitigate the issue.
Servo NXT in local mode If local control is being used,
ensure the local control station
is not active or is set to remote
mode.
Servo NXT in manual or
autocalibration mode
Check the indicators for manual
or autocalibration mode
Servo NXT not responding to
command signal
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
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Table 2: Servo troubleshooting chart
Problem Possible Cause Solution
Command signal does not
match input setting
Adjust the input setting to
match the command signal
used
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Cmd Signal Fault
Servo NXT is not receiving the
command signal
Test the Input Command
connection with a multimeter
or oscilloscope
Both limit switches engaged Adjust actuator cams
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Limit switch fault
Travel limit switch failure Test the switches to ensure
that they change states when
engaged.
Hand wheel is engaged Disengage (push in) hand
wheel
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Hand wheel fault
Hand wheel switch failure Test the switch to ensure that
it is changing states when
engaged.
Potentiometer outside of travel
range
Operate the actuator to the
fully open and fully closed
position, and adjust the
potentiometer position as
needed.
FB pot fault
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Torque switch setting enabled
with no torque switches
connected
Disable torque switch settings
Torque switch or switches
engaged
Check the valve and/or actuator
for obstructions.
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Torque switch fault
Torque switch failure Test the switches to ensure
that they change states when
engaged.
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Table 2: Servo troubleshooting chart
Problem Possible Cause Solution
Operational torque is
exceeding the torque rating of
the actuator
Check the valve and/or actuator
for obstructions.
Measure the torque required
to rotate the valve and verify
against the rated torque
Motor stall fault
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Fault occurring during
calibration
Operate the actuator to the
fully open and fully closed
position, and correct any faults
that occur
Fault condition during
autocalibration
Servo NXT is incorrectly wired Verify wire connections against
the wiring diagram
Some flash codes indicate a warning condition. In a warning condition (such as the indication of an
invalid calibration), the servo recovers automatically. In this case, default calibration automatically
loads. 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.
To recalibrate the servo, 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.
Note: If you detect error codes 3, 5, 6, or 7, contact your Johnson Controls representative for
further information.
Table 3: Green LED warning and information flash codes
Code Description Meaning
1 Normal Operation The actuator detects no errors
and operates normally.
2 Control Signal Calibration Error If this error occurs, add or
remove jumpers for the input
type.
3 Feedback Potentiometer Error An invalid feedback
potentiometer calibration is
detected. To ensure a valid
feedback calibration, ensure
that these conditions exist.
The upper limit calibration is
greater than the lower limit
calibration. The difference
between the upper and lower
limits is at least
3 volts.
The feedback potentiometer is
not wired backwards.
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Table 3: Green LED warning and information flash codes
Code Description Meaning
4 Calibration in Process The green LED flashes rapidly
during this operation.
5 Reverse Acting Warning This warning indicates that the
servo is configured to operate
in the Reverse Acting Mode.
6 Split Range 0 to 50% Warning This warning indicates that the
servo is configured to operate
in the Split Range 0 to 50%
range mode.
7 Split Range 50 to 100% Warning This warning indicates that the
servo is configured to operate
in the Split Range 50 to 100%
range mode.
8 Calibration in Process During a calibration, the LED
flashes rapidly at one-half
second intervals. When the
calibration is complete, the
LED resumes with the Normal
Operation flash code (Code 1)
unless another warning is still
pending.
Red LED
A flashing red LED indicates a fault condition that prevents the actuator from operating. Correct the
fault condition to allow the actuator to resume operating. If you detect error Code 16, contact your
Johnson Controls representative for further information.
Table 4: Red LED warning and information flash codes
Code Description Meaning
9 Handwheel Is Engaged (Pulled
Outward)
When the handwheel is
engaged, the servo can only be
operated manually. This error
also occurs if the handwheel
switch is incorrectly connected
to the servo.
10 Command Signal Failure When the servo is configured
to operate in the 0 to 20 mA
mode, an input greater than
20 mA triggers an error. When
the handwheel is configured
to run in 4 to 20 mA operating
mode, an input less than 4 mA
or greater than 20 mA triggers
an error. The Command Signal
is not checked in the 0 to 10 V
mode.
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Table 4: Red LED warning and information flash codes
Code Description Meaning
11 Feedback Potentiometer Failure If the feedback potentiometer
cannot be detected, or if in
the fully closed or fully open
position and the feedback
potentiometer is at the end of
its travel, an error is detected.
12 Open and Close Limit Switch
Failure
When both the open and
close limit switches are open-
circuited at the same time, an
error is detected.
13 Open Torque Limit Reached The open torque limit switch
has been tripped or the open
torque limit switch is incorrectly
connected to the servo.
14 Close Torque Limit Reached The close torque limit switch
has been tripped or the close
torque limit switch is incorrectly
connected to the servo.
15 Feedback Potentiometer Wired
in Reverse
This check is made only during
the servo autocalibration. The
feedback potentiometer is
wired in reverse when, at the
completion of the calibration,
the feedback potentiometer
value at the fully open position
is less than the value at the
fully closed position. To clear
the error, turn off the power to
the servo, correct the feedback
potentiometer wiring, turn on
the power to the servo, and
complete the autocalibration.
16 General Servo Failure If after cycling the power to
the servo, this error persists,
contact your local Johnson
Controls representative for
assistance.
17 Calibration Error This flash code is displayed
after a failed calibration for 3
seconds. See Code 2 and Code
3 in Servo Troubleshooting for
more information.
VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Technical Bulletin16

Disassembly and Assembly
The procedure for disassembly and assembly of the Series 70 actuators is set out below.
General Information
VA-9070 Series actuators are differentiated into four groups, according to size:
• VA-9073 actuators
• VA-9074 and VA-9075 actuators
• VA-9077, and VA-9078 actuators
• VA-907A and VA-907B actuators
Tools Required
Table 5: Basic Tools Common to All Actuators
Item Tool
Terminal Connections, Cam Adjustment Screwdriver, 3 to 4 Tip Blade
All Switches, Terminal Strip, Torque Switch
Plate
Screwdriver, No. 1 Phillips
Switch Plate Screws, Capacitor Screwdriver, No. 2 Phillips
Servo Trimmer Potentiometers Screwdriver, Blade for Trim Potentiometers
Table 6: Basic Tools for VA-9073 Actuators
Item Tool
Mounting Nuts Wrench, 1/2 in. (13 mm)
Cover Captivated Cap Screws Hex Key, 1/4 in. (6 mm)
Travel Stop Adjusting Studs Hex Wrench, 1/8 in. (3 mm)
Travel Stop Jam Nuts Wrench, 7/16 in. (11 mm)
Motor Mount Socket Flat-Head Cap Screw Hex Key, 3/32 in. (2 mm)
Motor Mount Socket-Head Cap Screw Hex Key, 9/64 in. (4 mm)
Table 7: Basic Tools for VA-9074 and 9075 Actuators
Item Tool
Mounting Nuts (Small Pattern), Travel Stop
Jam Nuts
Wrench, 1/2 in. (13 mm)
Mounting Nuts (Large Pattern) Wrench, 3/4 in. (19 mm)
Cover Captivated Cap Screws Hex Key, 5/16 in. (8 mm)
Travel Stop Adjusting Studs Hex Key, 3/16 in. (5 mm)
Motor Mount Socket-Head Cap Screw Hex Key, 5/32 in. (4 mm)
Table 8: Basic Tools for VA-9076, VA-9077, VA-9078, VA-907A, and VA-907B Actuators
Item Tool
Mounting Nuts, Travel Stop Jam Nuts Wrench, 3/4 in. (19 mm)
Cover Captivated Cap Screws Hex Key, 3/8 in. (10 mm)
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Table 8: Basic Tools for VA-9076, VA-9077, VA-9078, VA-907A, and VA-907B Actuators
Item Tool
Travel Stop Adjusting Studs 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)
Procedure for Series 70 Actuators
1. Disconnect external wiring from terminals
2. WARNING: Turn off all power and lockout/tag out service panel before installing or
modifying any electrical wiring.
NOTICE: Removal of switch plate with torque switches will void warranty
Disconnect the motor wires from the main terminal strip (motor neutral, open, and close).
3. To remove the switch plate:
a. Follow after disconnecting external wires and motor wires.
b. Unscrew the seven Phillips head mounting screws.
c. Lift the switch plate(s) out as an assembly with the indicator shaft attached.
Note: Do not misplace shaft coupler, insert, or mounting screws.
Figure 9: S70, Actuator Size E03, E06, E08 – switch plate removed
4. To replace the switchplate
a. Engage handwheel.
b. Place insert into the worm segment.
c. Place and center shaft coupler onto insert..
d. Align indicator shaft with groove in coupler and gently place switch plate into
position.
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e. Check alignment of override switch activation pin.
f. Check alignment of override switch activation pin.
g. Secure the switch plate with seven Phillips head mounting screws in a “star” pattern.
h. Disengage the handwheel.
5. To remove the indicator shaft from the switch plate:
a. Follow after removing the switch plate.
b. Remove the retaining ring from the shaft, located underneath switch plate.
c. Press the shaft out, from the bottom of the switch plate.
Note: Provide support to top of switch plate so that components on top of the switch
plate are not damaged during this procedure.
6. To remove the bearing from the switch plate:
a. Follow after the removing the indicator shaft.
b. Press the bearing from the top of the switch plate to remove the bearing.
c. To replace, press bearing (700000-72701534) into switch plate from the bottom of switch
plate.
7. To replace the indicator shaft in the switch plate:
a. Gently press the indicator shaft from the top of the switch plate until the cams are flush
with the top surface of the switch plate. Provide support for the press fit bearing during
this step.
b. Replace retaining ring (070375-74503534) on the shaft, located underneath switch plate.
c. Gently press the indicator shaft from the bottom until the retaining ring is flush with
bottom of the bearing.
d. Test indicator shaft for tight fitment and ease of rotation.
8. Other switch plate components:
a. Most components can be removed from the switch plate without removal of the switch
plate.
Note: Override switch assemblies are typically only removable after the switch plate
has been removed. A specialty (short or 90°) screwdriver could be used for disassembly
when the switch plate is still attached to the actuator base.
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Figure 10: S70, Actuator Size E03, E06, E08 – switch plate exploded view
9. To remove the gear motor:
a. Follow after removing the switch plate.
b. Disconnect the motor leads which run to the capacitor (120/220VAC motors).
c. For Actuator Size E03, E06, and E08, unscrew the mounting screws (two lower, one upper).
d. For Actuator Size E12, E20, and E30, unscrew the mounting screws (four lower, one upper).
e. For Actuator Size 050 - 180, unscrew the mounting screws (five lower, one upper).
f. Remove the motor vertically out of the unit.
Note: Do not misplace the alignment pin(s), mounting screws or lockwashers.
10. To replace the gear motor:
a. Replace alignment pin (070612-71904520).
b. Place motor into housing and align motor with worm shaft spur gear.
c. Secure the motor with mounting screws and lockwashers in a “star” pattern.
d. Manually operate actuator to ensure proper alignment.
e. Connect motor leads to capacitor (PSC motors only).
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