User Guide

OpenAir™ Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
24 Vac – Modulating Control Document Number 155-187P25
May 19, 2014
Siemens Industry, Inc. Page 11
Manual Override
To move the damper blades and lock the position with no
power present:
1. Slide the red manual override knob toward the back of
the actuator.
2. Make adjustments to the damper position.
3. Slide the red manual override knob toward the front of
the actuator.
Once power is restored, the actuator returns to automated
control
.
Figure 22.
Manual Override.
Mechanical
Range
Adjustment
To mechanically limit the range of the damper blade.
1. Loosen the stop set screw.
2. Move the screw along the track to
the desired position, and fasten it
in place.
Figure 23. Moving the Mechanical Range Stop.
To use the entire 0 to 10V input signal to control the mechanically limited range, see
Figure 18 for setting self-adaptive features.
Example:
Stop set screw at 70°
Self-adapt switch ON
Input signal Y = 5 Vdc
The damper will be at 35° (50% of the adjusted range.)
NOTE: On versions with the slope and offset features, this example assumes
Offset Uo = 0 Vdc
Slope ∆U = 10 Vdc
1
2