BELIMO FSAF24 DAMPER ACTUATOR

Description

Application
For two position control of UL555S rated dampers in HVAC. Actuator sizing should be
done in accordance with the damper manufacturer’s specifications.
The actuator is mounted directly to a damper shaft or jackshaft 3/8” to 1.05” in
diameter by means of its universal clamp. A crank arm and mounting brackets are
available if the actuator cannot be direct coupled to the jackshaft or damper shaft.
Square footage of damper operated will depend on make and model of damper.
Typically 12 sq.ft. minimum up to 24 sq.ft maximum will be operated for UL555S
applications.
Operation
The FSAF series actuators provide true spring return operation for reliable fail-safe
application and positive close-off on UL555S dampers. The spring return system
provides constant torque to the damper with, and without, power applied to the
actuator.
The FSAF series provides 95° of rotation and is provided with a graduated position
indicator showing 0 to 95°. The FSAF has a manual positioning mechanism which
allows the setting of any damper position within its 95° of rotation.
The actuator is shipped in the zero fail-safe position to provide automatic compression
against damper gaskets for tight shut-off. When power is applied, the manual
mechanism is released and the actuator drives toward the
open position where it stops rotating.
The manual override can also be released physically by the use of a crank supplied
with the actuator