Mounting And Installation - Siemens OpenAir GCA Series Technical Instructions

OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator
<62 lb-in (7 Nm)
>62 lb-in <142 lb-in
(>7 Nm <16 Nm)
>142 lb-in <284 lb-in
(>16 Nm <32 Nm)
NOTE:

Mounting and Installation

NEMA 2
Figure 17.
Acceptable NEMA 2-Positions.
•
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.
Siemens Building Technologies, Inc.
Total Torque
GMA
GCA
ASK73.2U*: Tandem mounting bracket with any
combination of GCA16x.
ASK73.1U*: Tandem mounting bracket for all
other GCAx actuators.
Used for tandem applications up to four actuators.*
Table 2.
Sizing
Actuator
Only Acceptable 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.
Technical Instructions
Document No. 155-173P25
Figure 18.
March 17, 2006
Page 11