Installation Instructions

Document No. 550-163
Installation Instructions
June 18, 2015
Page 4 of 11 Siemens Industry, Inc.
2. Determine the damper blade rotation,
clockwise or counterclockwise to open.
 If the blades will rotate counterclockwise,
slide the manual override switch to manual,
and move the adjustment lever to the right.
Return the switch to automatic.
 If the blades will rotate clockwise, slide the
manual override switch to manual, and move
the adjustment lever to the left. Return the
switch to automatic.
3. Close the damper blades.
4. Mark the end of the damper shaft with a
pencil/marker.
5. Tighten the set screw until the first thread can be
seen in the shaft hole.
6. Using the pencil mark as a guide, mount the
actuator on the damper shaft.
7. Install the position indicator.
8. Tighten the adjustment lever to the proper torque
listed:
- 70 +/- 5 inch-pounds for solid metal.
- 37 +/- 2 inch-pounds for plastic graphite
composite (hollow metal shafts require an
insert to prevent shaft damage).
9. Attach the mounting bracket.
NOTE: When installing the mounting bracket
directly on the ductwork be sure to position the
bracket such that the screws do not obstruct the