VSI Series 1000-X Electric Actuator
Operation and Maintenance Manual
11
ADJUSTMENT OF ACTUATOR
1. Using the manual handwheel or hand crank, drive the
valve to the fully closed position. Visually inspect the valve
disc/ball to ensure it is fully closed, but not over-rotated
close.
2. If the dome indicator does not indicate fully close remove
the top wiring cover using a screwdriver. Loosen the
center Phillips head screw holding the dome indicator and
rotate the indicator to the correct position. Re-tighten the
screw to secure the dome indicator.
3. Using a multi-meter or test indicator light test continuity
between the closed limit switch contacts, 4 and 6 on the
terminal block. If electric test equipment is not available,
listen for the audible click of the limit switches.
Switch Adjustment
4. If the contacts indicate continuity (switch activated):
a. Using a 2mm Allen wrench, rotate the closed position
regulating shaft (S) in the counterclockwise direction
until the switch deactivates.
b. Then rotate the close regulating shaft clockwise until
the switch reactivates.
5. If the contacts do not indicate continuity (switch
deactivated)
a. Using a 2mm Allen wrench, rotate the closed position
regulating shaft (S) in the clockwise direction until the
switch activates.
6. Repeat steps 1-5 for the open position, testing for
continuity between terminals 4 and 5 on the terminal
block and using the open position regulating shaft (O).
Scale plate
Dome indication
Full-open position
Full-close position
Lock screw
Opening gear
Shut position regulating shaft
Open position regulating shaft
S(Red)
O(Green)
D2
D1
O
S
K1
K2
K3
K4
Open-direction
��
middle
�
position
Close-direction
�
middle
�
position
Micro-switch
Clockwise
Stroke dog
Counter-
Clockwise
Clockwise
Regulating shaft
Figure 4
1. Using the manual override handle or handwheel, rotate the valve in
the closed direction until the feedback indicates a current or voltage
that correlates with fully closed as established in the controller
adjustment section. Rotate handwheel or crank in close direction
an additional 1/2 turn.
2. Loosen the lock-nut on the left side of the unit and rotate the
adjusting screw clockwise using an Allen wrench until the
screw comes into contact with the stopper, then back off ½ turn
counterclockwise. Tighten lock nut to finish close mechanical stop
adjustment.
3. Repeat steps 1-2 for the open direction.
To prevent damage,
the mechanical stops
should never be used
to limit the rotation of
the actuator. Electrical
WARNING
Figure 7
Electric Limit-Switch
(Full Close Position)
Electric Limit-Switch
(Full Open Position)
Mechanical Limit-Switch
for close direction
Mechanical Limit-Switch
for open direction
90°
2.5
°
2.5
°
Figure 6
Adjusting screw for
closing limit-switch
Adjusting screw for
opening limit-switch
Lock Nut
Mechanical
Limit Stopper
MECHANICAL ADJUSTMENT
limit switches are provided to set travel limits. Please refer to
section above to set travel limit.
Actuator Size
Lock Nut
Adjusting Screw
1005-X & 1005-XL
10mm
3mm
1010-X
13mm
4mm
1020-X to 1060-X
17mm
5mm
1100-X to 1250-X
19mm
6mm
