FSE Series Electric Actuator
Installation & Maintenance Manual
12
November 18, 2022
www.atcontrols.com
Engineering\documents\products\IOM\Iom08026.docx
CALIBRATION
Actuator Setup
If the actuator is equipped with a manual override, rotate the handwheel to return the actuator to its
spring released position before power is supplied.
Securely tighten the conduit fittings to ensure the enclosure protection rating.
Triac Spring return actuator provided fail-safe positioning which is controlled by buffer or mechanical stops. (ON-
OFF Type controlled by buffer. / Floating and Modulating Type controlled by mechanical stops). When the actuator
is powered, the end position is determined by limit switches.
The actuator has been set and calibrated at the factory. Most products will not require recalibration of these
settings. However these are general settings. After valve and actuator are bolted together, apply power to drive
the actuator to its end (spring compressed) position. Then remove power to let the rack and pinion spring
mechanism drive back to its fail (spring released) position. If the OPEN or CLOSE stop point are not aligned with
the valve or damper correctly, the end positions must be adjusted per the following steps.
For modulating unit, be sure to loosen the sector gear of the potentiometer before adjusting the
following settings.
