Install Instructions

OpenAir GMA Series Spring Return, 62 lb-in, Rotary, Electronic Damper Actuators Technical Instructions
Document Number 155-315P25
March 6, 2018
Siemens Industry, Inc. Page 5
Actuator
Components
Figure 1. Components of the GMA Spring
Return Actuator.
Legend
1. Actuator housing
2. Positioning scale for angle of
rotation
3. DIP switches and cover
4. Span adjustment
5. Offset (start point) adjustment
6. Mounting bracket
7. Connection cable for power and
control signals
8. Connection cable for auxiliary
switches or feedback potentiometer
9. Gear train lock pin
10. Manual override wrench opening
and direction of rotation arrow
11. Auxiliary switches A and B
12. Position indicator
13. Self-centering shaft adapter
14. Shaft adapter locking clip
15. Position indicator adapter
16. Key for manual adjustment
17. Adjustment tool for: auxiliary
switches (11), offset/span (4 and 5),
and lock pin (9)
18. 1/2-inch NSPT conduit connections
Accessories
NOTE: The auxiliary switches, control signal adjustment, and feedback
potentiometer cannot be added in the field. Order the product number
that includes the option(s).
Figure 2. Floor/Frame Mount Kit.
ASK71.11: For in-the-air stream
applications; anywhere a foot-mounted
actuator can be mounted. Can also be
directly mounted to a damper frame with
louvers and vents and in applications
where use of the floor mount is not
possible.
Kit contains:
• Crank arm to change the
angular rotation into a linear
stroke.
• Support bearing ring to
minimize side loading on the
actuator’s output bearing.
• Mounting bracket, and required
mounting fasteners.