2 verify limit switch and torque switch settings, 3 adjusting the actuator feedback potentiometer – Flowserve Modutronic 20 II Modulating Position Controlle User Manual
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Limitorque Actuation Systems Modutronic 20 II FCD LMENIM4002-00 – 08/06
flowserve.com
Figure 4.2 – Standard Motor Rotation and Reverse Motor Rotation Wiring Diagrams for Dual-Voltage,
Capacitor-Start, Induction-Run, and Single-Phase High-Voltage Motors
b. Test Motor direction again by momentarily pressing the OPEN pushbutton. If the actuator
moves toward OPEN, the motor is wired properly for the application. If not, check the wiring
diagram for proper wiring.
4.2 Verify Limit Switch
and Torque Switch Settings
Set the OPEN and CLOSE Limit Switch and the Torque Switch according to the instructions in the
specific Actuator instruction manual.
4.3 Adjusting the Actuator
Feedback Potentiometer
WARNING: Hazardous Voltage. Turn power OFF before calibrating the Feedback Potentiometer.
1. Shut off all power to the actuator.
2. Using the Handwheel, position the actuator to mid-travel (valve at the 50% position).
3. Disconnect the Potentiometer Wiring Harness from where it is plugged in or
connected to a Terminal Strip.
4. Using an ohmmeter verify that the Potentiometer is in mid-travel position. The resistance
from each End Connection to the Center Connection should be half of the full resistance of the
Potentiometer. Example: 1000 ohm Potentiometer should read approximately 500 ohms from
one of the End Connections to the Center Connection.
c
Standard Rotation
Wiring
T6
L1
L2
4
C
5
R2 T7
O
C
R1
R2
Cap
1
2
1
2
O
C
R1
T5
4
5
O
T8
T10
T3
T4
T4
T1 T2
T3
T4
T6
T9
T4
Reverse Rotation
Wiring
T6
L1
L2
4
C
5
R2 T7
O
C
R1
R2
Cap
1
2
1
2
O
C
R1
T5
4
5
O
T1
T2
T3
T9
T4
T8 T10
T6
T4
T3
T4
T4
T3
T6
Standard Rotation
Wiring
T6
L1
L2
4
C
5
R2 T7
O
C
R1
R2
Cap
1
2
1
2
O
C
R1
T5
4
5
O
T8
T10
T3
T4
T4
T1 T2
T3
T4
T6
T9
T4
Reverse Rotation
Wiring
T6
L1
L2
4
C
5
R2 T7
O
C
R1
R2
Cap
1
2
1
2
O
C
R1
T5
4
5
O
T1
T2
T3
T9
T4
T8 T10
T6
T4
T3
T4
T4
T3
T6