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Technical Instructions
Document No. 155-177P25
December 15, 2004
Mechanical range
adjustment, continued
Reversing the position
indicator
Page 10
Counterclockwise-to-open:
a. Insert the shaft adapter to the left as close as possible to the raised stop.
b. Hold down the PUSH button and rotate the shaft adapter to the right until it
stops.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the right raised stop, remove the
adapter and insert it against the right stop.
e. Place the position indicator to "0" on the inside scale.
4. Determine the angle of rotation for the damper blade shaft. Subtract that amount
from 90°.
5. Remove the shaft adapter and insert it with the position indicator pointing to the
mark on the scale calculated in the previous step. See Figure 19.
6. Attach the clip.
7. Rotate the damper blade shaft to its "0" position.
8. Return the actuator to the damper shaft and tighten the shaft adapter to the damper
shaft.
Figure 19. Mechanical Range Adjustment.
Reverse the position indicator so that the counterclockwise 0 to 90 scale is visible.
OpenAir
90
90
PUSH
POSITION
INDICATOR
1
Figure 20. Position Indicator.
TM
NSR Rotary Electric Damper Actuator
24 Vac 3-position Control
2
3
Siemens Building Technologies, Inc.
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