Direct coupling
Note that actuator floats freely. Clamp cold welds when teeth dig into the damper shaft and
the anti-rotation strap stud allows the actuator to move if shaft is not perfectly concentric.
Rigid mounting by jamming the stud into the U-slot of actuator is NOT usually best.
Best to mount the Belimo anti-rotation strap perpendicular to the
actuator to allow for movement on non-concentric shaft.
Short shaft mounting
FSNF mounted on the
damper shaft. Two
screws hold the anti-
rotation strap. Two nuts
secure cold-weld clamp
onto shaft.
FSAF mounts the same.
Depending on the geometry, any number of mounting arrangements are correct.
Direct coupling is easiest and most
Alternately, the anti-rotation strap can be attached to any Belimo linkage, an electrical
J-box cover plate, or to a pieced of U-channel.
It is important to remember that the ducts are fall-away. The actuator mounting
cannot interfere with the ability of the duct to fall from the damper. The damper must
continue to protect the wall.
See Belimo Mounting Methods Guide.
Side view
For short shaft mounting, the
ZG-LMSA-1/2-5 can be used.
Alternately, the clamp can be
installed between the actuator
and sheet metal.
Clamp
Ruskin Phillips P150 to Belimo FSNF or FSAF March 2018
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