Siemens ASC77.2U 사용자 설명서

Document No. 129-420 
Installation Instructions  
December 13, 2004 

 

EA1

179R1

 

NOTE:  For in-service actuators, skip Removing Pre-

load. For new actuators, remove the factory-
installed 5° pre-load. 

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. 

EA1190R1

 

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. 

 

EA1192R1

2.  Manually install the shaft adapter against the 

external stop on the left end of the actuator. (See 
position B in Figure 4.) 

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). 

EA1

177R1

 

NOTE:  
GCA/GBB/GIB 
models use the 
larger ring. 
GMA/GEB models 
use smaller ring.
See Figure 1. 

Siemens Building Technologies, Inc.