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 9
Mounting and Installation
Flip the actuator to select either clockwise or counterclockwise fail-safe rotation of
the damper shaft. Follow steps 1, 2, and 3 of Table 3 to determine the correct
actuator mounting orientation.
Table 3. Actuator Mounting Orientation and Damper Control.
• The shaft adapter and the position indicator can be mounted on either side of the actuator. The actuator
mounting orientation and shaft length determine how they will be mounted on the actuator.
• The minimum damper drive shaft length is 3/4-inch (20 mm).
• See Specifications for the minimum and maximum damper shaft dimensions.
• The actuator is shipped from the factory with a 5° preload enabling tight close off of the damper in power-fail-
close applications.
• A mounting bracket is included with the actuator.
• The shaft adapter and mounting parts are shipped in a separate container with the actuator.
• See the detailed mounting instructions included with each actuator.