VPI Pressure Independent Control Valves & Actuators
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MLP75MAB and MLE75MAB Actuators
Configuration and Setup
Start Up Sequence
When power to the actuator is turned on, the actuator will automatically calibrate to determine closing point. Hereafter
it will proceed to normal operation mode (according to control signal). For the failsafe version, capacitor charging will
be prioritized (max. 215 sec depending on capacitor energy level) during start-up and re-powering. After completion of
charging mode followed by calibration mode, the actuator will proceed to normal operation mode.
Auto Cycle Sequence
Auto Cycle can be activated during commissioning. It prevents the valve from jamming when the valve is not moved
for a longer period of inactivity. By moving DIP switch #1 from OFF to ON, Auto Cycle is activated. Actuator will then
perform 50% stroke cycle every 3 weeks if no stroke movement has occurred.
Re-Calibration (MLP75MAB)
By flipping DIP switch #6 from one setting to the other (starting position indifferent) re-calibration is activated. After
completed re-calibration the actuator will automatically go into normal operation. During re-calibration mode the
LED will blink green.
Manual Override (MLP75MAB)
Before performing manual override, please turn off the power supply. Lift the silicone cap on the top of the actuator
to get access to manual override. Manual override is performed by a 4 mm (~5/32”) hex key. Clockwise turning will
open the valve and counterclockwise turning will close the valve.
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