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Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-03-A4 – 06/15
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NOTE: Most applications require turning the Handwheel CW to obtain the full CLOSE position and CCW to obtain full
OPEN position. The actuator Drive Sleeve rotates in a CW direction to the CLOSE position and CCW to the OPEN position.
The Limit Switch Intermediate Shafts rotate in a CCW direction to the CLOSE position and CW to the OPEN position. If
your application is configured differently, keep in mind that the descriptions in this manual will describe rotation directions opposite of
your application.
5. Once the valve is fully CLOSED, turn the Handwheel back toward OPEN approximately one full turn. This will allow for coasting during
motor operation.
a
CAUTION: Do not operate the actuator when the Clutch Screw is in a fully depressed position; loss of the contact setting will occur and
the Setting Rod will be damaged.
a
CAUTION: For highly geared actuators, one turn of the handwheel may not be sufficient to allow for coast of moving parts. Refer to
valve manufacturer setting requirements in these cases.
6. Push in Clutch Screw and turn CW one-quarter turn to latch in a depressed position. See Figure 9 for Limit Switch nomenclature.
7. Limit Switch Rotor Cams
A. If your Limit Switch Rotor Cams did not trip at the full CLOSE position point, turn the Intermediate Close Shaft in a CCW
direction until the Close Limit Rotor Cam rotates 90° to make an OPEN contact (CLOSE limit trip point = Rotor Cam in a vertical
orientation to make an OPEN contact). Once you have reached the full CLOSED position point, rotate the Intermediate Shaft slowly
in the CW direction until the Rotor just trips again.
B. If your Limit Switch Rotor Cams did trip before reaching the full CLOSE position point, leave the valve at the full CLOSE position
point and turn the Intermediate Close Shaft in a CW direction until the Close Limit Rotor Cam rotates 90° to make an OPEN
contact (CLOSE limit trip point = Rotor Cam in a vertical orientation to make an OPEN contact). Once you have reached the full
CLOSE position point, rotate the Intermediate Shaft slowly in the CCW direction until the Rotor just trips again.
8. Before operating the actuator, depress and turn the Clutch Screw CCW one quarter turn to the spring release position. Insert a
screwdriver into the Intermediate Shafts and “rock” them CW and CCW a few times to ensure all the gearing is seated well.
4.4 Torque Switch Setting and Wiring
c
WARNING: Hazardous Voltage. Turn the power OFF before opening the Electrical Compartment Cover or making any adjustments
to the Torque Switch.
NOTE: Removal or modification of the Torque Switch Limiter Plate will void the actuator warranty. Do not exceed the torque setting
indicated by the Torque Switch Limiter Plate without contacting the Limitorque Customer Service Department.
The L120-85 actuator is equipped with a double-acting Torque Switch that has been factory preset according to the required torque value
provided by the valve manufacturer or other associated equipment supplier. Further Torque Switch adjustment should not be required;
however, the Torque Switch may be reset from positions 1 through 5 (5 being the highest input torque requirement) by adjusting the Torque
Switch Adjustment Screws unless it is limited by the Limiter Plate. See figure 11 for Torque Switch nomenclature.
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