ISO 9001
3. Test for adequate shaft length by sliding the actuator over
the shaft. The shaft should extend at least 3mm through
the clamp. Long shafts should be at least 90mm, in which
case the clamp should be
fi
tted on the installer’s side of
the actuator, and short shafts should be at least 20mm, in
which case the clamp should be
fi
tted to the damper side
of the actuator.
Note: All actuators are shipped with a standard universal
mounting clamp installed. For damper shafts larger than
16mm in diameter, the AM-710 universal mounting clamp
is required (order separately). The AM-710 clamp accom-
modates round shaft sizes up to 19mm in diameter
4. On the basis of the shaft lenght proceed as follows.
Long Damper Shaft Mounting
Clockwise motor drive
Counterclockwise spring return
Counterclockwise motor drive
Clockwise spring return
•
Determine the best orientation for the universal mounting
clamp on the back of the actuator. The best orientation pro-
vides the easiest access to the two nuts on the V-clamp.
•
Engage the clamp to the actuator as close as possible to
the determined orientation, then lock the clamp in place
using the remaining retainer clip.
•
Place position indicator on the actuator and secure with the
•
retainer clip. Ensure that the position indicator is at the be-
fore Pre-tensioning position (see following illustration).
•
Position the damper at its normal (spring return) position
and check that it is fully closed or completely open.
Position Indication and Pre-tensioning
5. Slide the actuator over the shaft and verify that the position
indication pointer on the universal mounting clamp is in the
normal spring return position.
•
Secure the universal mounting clamp to the actuator using
the retaining clip.
•
Position the damper at its normal (spring return) position
and check that it is fully closed or completely open.
•
Continue from Step 5.
Short Damper Shaft Mounting
1
st
Issue
09/13
3 DBL153e
Correct universal clamp poin-
ter mounting position if ac-
tuator is in normal spring
return position (before Pre-
tensioning)
6. Tighten the universal mounting clamp,
fi
nger tight only.
7. Align the universal bracket at the base of the actuator and
drill mounting holes. Bend the bracket as needed to reach the
duct.
8. Place a No.8 self-tapping screw in one side of the universal
bracket and mount it the duct at the base of the actuator. Do
not tighten the screw.
9. Pivot the universal bracket away from the actuator.
Central line
With clamps loosened, ro-
tate approx. 5° away from
vertical, tighten clamps, then
return to vertical
.
1,6 ÷ 4,8 mm
