Installation, New Actuators, Remove Pre-load

Document No. 129-420

Installation Instructions

December 13, 2004

Installation

New Actuators, Remove Pre-load

GCA, GBB, GIB

GMA, GEB

EA1179R1

Figure 3. Determine Actuator Model and Orientation.

NOTE: For in-service actuators, skip Removing Pre- load. For new actuators, remove the factory- installed 5° pre-load.

Removing Preload

Before the External Auxiliary Switch can be installed on a new, out-of-the-box actuator, you must remove the factory-installed preload.

New Non-Spring Return Actuators

1.Insert shaft adapter at position A (See Figure 4).

2.Press the manual override button and move the shaft adapter counterclockwise until actuator reaches the internal stop (actuator will not move past this point).

3.Remove the shaft adapter and manually reinstall it against the external end stop at position B (See Figure 4).

4.Proceed with EAS installation.

PUSH

EA1190R1

Figure 4.

Insert Shaft Adapter at Position A.

New Spring Return Actuators

1.Without the shaft adapter installed, using the hex wrench, wind the manual override one full revolution and release the wrench (See Figure 5). The actuator will return to the 0° position and the preload is now removed.

Manual

Override

1-Turn

EA1192R1

Figure 5.

2.Manually install the shaft adapter against the external stop on the left end of the actuator. (See position B in Figure 4.)

Removing Factory Pre-load from New SR Actuator.

Preparing the Actuator Shaft Adapter

1.Remove the position indicator from an in-service actuator.

2.Determine the appropriate position adapter ring (See Figure 1).

3.Align and snap the three open notches on the edge of the EAS position adapter ring in place over the three raised stubs on the actuator shaft adapter. (See Figure 6).

NOTE:

GCA/GBB/GIB models use the larger ring.

GMA/GEB models use smaller ring. See Figure 1.

EA1177R1

Figure 6. Attaching the EAS Position Adapter Ring.

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Siemens Building Technologies, Inc.

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