Limitorque QX Electronic Actuator FCD LMENIM3306-06 – 07/14
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3.6 Operating the QX Actuator
3.6.1 Manual Operation
Operate the actuator with the handwheel as follows:
1. Depress the declutch lever and, at the same time, slowly rotate the handwheel until the clutch is fully engaged.
2. Release the lever and it will return to its original position. The clutch will be retained in the handwheel mode by
spring-loaded latches.
Figure 3.17 – Declutch lever shows direction of engagement (QX-05 shown)
DECLUTCH LEVER
STANDARD DECLUTCH POSITION
DECLUTCH LEVER
CLUTCHING POSITION FOR
MANUAL (HW) OPERATION
Manual operation is now possible and the actuator can only be returned to motor operation by energizing the motor.
Energizing the motor will trip the spring-loaded latch and allow the clutch to disengage from the handwheel and
re-engage with the gear drive. To prevent unauthorized manual operation of the actuator, the declutch lever may be
padlocked in “MOTOR” mode. A ½ inch size padlock is recommended.
3.6.2 Electrical Operation
Before applying power to the actuator, check that the supply voltage details on the nameplate are correct for this
installation. An incorrect supply connected to the actuator terminals could cause fuses to blow or cause permanent
damage to the electrical components in the unit. Phase rotation need not be checked since all units are supplied with an
Autophase Correction feature. Apply power to the actuator but do not operate the actuator without first checking that it
has been set up and configured correctly for its intended application.
3.6.3 Local Control
Once the position limits have been set (see Section 3.5.4, Setting Position Limits) and the default mode is the main-
tained mode, the actuator can be controlled locally from the control panel.
1. Place the red selector knob in the “LOCAL” position.
2. Select “OPEN” or “CLOSE” via the black control knob.
If maintained control has been selected, the actuator will continue to run when this control knob is released. The
actuator may be stopped at any time by placing the red selector knob in the “STOP” position, or the direction may be
reversed or stopped using the black control knob.
If non-maintained control mode (inching) has been selected, the actuator can be inched to any intermediate position by
holding the black control knob in the desired position, “OPEN” or “CLOSE,” for as long as necessary. The actuator will
stop when the knob is released.
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