FSE Series Electric Actuator
Installation & Maintenance Manual
3
November 18, 2022
www.atcontrols.com
Engineering\documents\products\IOM\Iom08026.docx
OVERVIEW
Triac electric spring return actuators are designed to provide fail-safe positioning of valves and dampers
upon loss of supply voltage, and include on/off control and modulating control. A mechanical spring set is used to
position the controlled device to either the fully counterclockwise (OPEN) or fully clockwise (CLOSED) position
without any external power source. For ON-OFF type, a mechanical BUFFER employed at the end of the spring
stroke in order to reduce the dynamic effects of the spring return system. A clutch-less and lever-less manual
overrideis available to provide manual positioning of the controlled device.
General Information
Safety Instructions
Installation, maintenance and repair works must be performed by trained personnel.
Handling shall follow the safety and warning instruction contained in this manual.
The user should read and follow instructions contained in this operation manual. Failure to do so may result
in damages and void warranty.
Local health and safety legislation shall be complied with.
In some cases, the surface temperature may exceed 140°F (60°C). Please check surface temperature
before operation.
Installation Notices
CAUTION:
For safety reasons, do not remove or inspect the SPRING STRUCTURE. Serious injury
of damage may occur unless proper tools are used.
Operating by handwheel: Do not use any tools to increase force on handwheel for operating as this
can damage the actuator or valve. Actuator MUST be returned to its spring release position before
operating electrically.
The standard spring return actuator rotates counterclockwise with power (spring compressed) and rotates
clockwise with spring released (fully closed or fully open) on loss of power.
Please read operation manual and wiring diagram before installation.
Verify that supply voltage is in accordance with the data on nameplate to prevent short circuit or
electrical/electronic parts damage.
Turn off power before wiring or maintenance.
Connect ground wire to PE point inside the actuator.
Do not parallel wire multiple actuators together without using extra relays.
Actuator should be installed in upright or horizontal position. Do not mount upside down or below horizontal.
These units are not designed to operate in vacuum spaces or where an explosive atmosphere is present.
Periodically inspect actuator enclosure to prevent dust accumulation.