Specifications

Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator
Document No. 155-173P25
December 11, 2014
Page 12 Siemens Industry, Inc.
Mounting and Installation
Figure 17.
Acceptable NEMA 2,
IP54 per EN 60 529
Mounting Positions.
Figure 18.
Only Acceptable Mounting Position for NEMA Type 3R
Rating Using ASK75.1U Weather Shield.
The GCA actuator is UL listed to meet NEMA Type 3R requirements
(a degree of protection against rain, sleet, and damage from external
ice formation) when installed with the Weather Shield (product
number ASK75.1U) and outdoor-rated conduit fittings. Actuator must
be in the vertical position.
• 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.