Flowserve L120-85 Actuator - Manual (Page 20)

is flush against the Actuator Compartment and the hole for the
Mounting Screw is aligned. Install the Mounting Screw.
5. Tighten the Balancing Screws. The Torque Switch is now bal-
anced and ready for Index Arm (piece 300-2 and piece 300-3) to
be returned to their original settings.
6. Follow your wiring diagram to connect Torque Switch wiring.
4.6.4 Rewiring the Torque Switch for
Non-Standard Drive Sleeve Rotation
a CAUTION: Double check your wiring diagram to verify that
your Torque Switch is wired appropriately for your applica-
tion. The Torque Switch will not protect your valve from
over-torque if you do not apply appropriate wiring for your
application.
L120-85 actuators are typically supplied with a CCW Drive
Sleeve rotation to open a valve. The two Torque Switches are marked
OPEN (CCW
) and CLOSE (CW ) based upon CCW
Drive Sleeve rotation to open the valve. The MDPI on the L120-85
is typically mounted for the full CCW
rotation to indicate the
OPEN position (100%). If opposite drive sleeve rotation is required
(CCW
to CLOSE a valve), the following torque switch modifica-
tions are required.
c WARNING: Hazardous Voltage. Turn power OFF before
opening the Electrical Compartment Cover or making any
adjustments to the Torque Switch.
1. Turn power to the actuator OFF before changing Torque Switch
wiring.
2. Reverse the OPEN and CLOSE Torque Switch labels on the ID
Limiter Plate. See figure 11.
3. Interchange OPEN Torque Switch wires 18 and 18C with
CLOSED wires 17 and 17C (refer to your wiring diagram for
other Torque Switch wiring configurations).
Figure 12: Reversing Torque Switch wiring
Typical CLOSE
contact assembly
(17 & 17C)
NOTE: 17C and 18C attach
to screws (not shown) on
the bottom of the switch.
#300-4 Torque Switch
Adjustment Screws
Typical OPEN
contact assembly
(18 & 18C)
18
18C
17
17C
4. Remove the Mechanical Dial Position Indicator Plate and flip
over for indication of CCW rotation to the valve’s CLOSED
position. See figure 13 for MDPI Dial Plate.
5. Reverse the OPEN/CLOSE directional arrow on the Handwheel.
4.7 Position Indication
The MDPI is used to indicate the current position of the valve or
other actuated devices. Adjustments must be done after mounting
the actuator on the application. If your supplier has not set the MDPI
or your application has changed and requires resetting, use the fol-
lowing procedure to complete the MDPI settings.
c WARNING: Hazardous Voltage. Turn power OFF before
opening the Electrical Compartment Cover, calibrating the
MDPI or installing the Remote Voltmeter Indicator.
4.7.1 Local Position Indication
1. Turn OFF all power to the actuator.
2. Manually position the valve in the fully CLOSED position.
3. Loosen the Round Head Machine Screw (piece 523) on the
MDPI Pointer (piece 522).
Figure 13: Aligning MDPI Pointer for Fully CLOSED Position
#523 Round
Head
Machine
Screw
#522 MDPI
Pointer
MDPI
Dia l
Plate
4. Move the MDPI Pointer to the (CLOSED) position.
NOTE: If your application uses CW Handwheel rotation to
OPEN, flip the MDPI Plate over to properly orient the OPEN and
CLOSED position on the MDPI Plate.
5. Tighten the Round Head Machine Screw on the MDPI Pointer.
Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-00 – 11/05
20