Operation; Typical Ly 1001 Operation; Verify Correct Motor Rotation (Phasing) And Open/Close Pushbutton Operation6-1; Three-Phase Motor - Limitorque LY Series Installation And Maintenance Manual

6

Operation

6.1
6.2
6.2.1
LMAIM1501

Typical LY 1001 Operation

LY actuators are always available for motor operation when the motor is energized.
NOTE: Applied voltage rating = voltage rating of actuator ±10%
a WARNING: Do not manually operate the actuator with devices other than installed Handwheel and Declutch
Lever. Using force beyond the ratings of the unit and/or using additive force devices such as cheater bars,
wheel wrenches, pipe wrenches, or other devices on the actuator Handwheel or Declutch Lever may cause
serious personal injury and/or damage to the actuator or valve.
CAUTION: Do not motor-operate the valve without first setting or checking the limit switch setting, motor direc-
tion, and mechanical stops. Do not force the Declutch Lever into the motor operation position. The Declutch
Lever returns to motor-operation position automatically when the motor is energized.
Verify Correct Motor Rotation (Phasing) and OPEN/CLOSE
Pushbutton Operation
Correct motor rotation must be verified to prevent serious damage to valve or other equipment. If the actuator
motor rotates in the wrong direction, damage could occur by over-torquing equipment into a seated position.
Prior to being shipped from the factory, each actuator is inspected to verify proper operation of the Torque and
Position Limit Switches and to ensure that they function correctly, i.e., closes when the CLOSE pushbutton is
depressed, opens with the OPEN pushbutton, etc. These inspections are made with a properly phased power source
connected as described in the actuator manual.
CAUTION: To ensure proper operation and to prevent your actuator or other actuated equipment from damage,
verify that your unit is properly connected to its power source.

Three-Phase Motor

NOTE: Your application may vary from the standard wiring configuration for three-phase shown in Figures 6.1 and
6.2. Refer to the specific actuator wiring diagram for wiring configuration.
1. Using the Handwheel, move the valve to a midtravel position. Midtravel position allows brief electrical
operation in the valve "safe" area and keeps the OPEN and CLOSED Limit Switches from tripping while testing
motor direction.
2. Test motor direction by momentarily pressing the OPEN pushbutton:
a. If the actuator moves toward CLOSED, immediately turn all power OFF and reverse the motor leads T1
and T3 on terminal strip.
LY Installation and Maintenance for LY 1001, LY 2001 and LY 3001
Flow Control Division
Limitorque Actuation Systems
6-1