Technical Instructions   OpenAir Non-Spring Return Rotary Electric Damper Actuator 
Document No. 155-188P25 
24 Vac Floating Control 
December 26, 2007 
Page 4  Siemens Building Technologies, Inc. 
   
 
Accessories, 
Continued 
EA0807R1
 
Figure 5.  
Shaft Insert. 
ASK78.3U Shaft insert for use with 3/8-inch (8 
to 10 mm) diameter shafts. (Included in box with 
GDE/GLB Series). (Pkg/10) 
NOTE:  Factory installed 1/2-inch guide must 
be removed prior to installation.
 
 
EA1060R1
 
Figure 6.  Shaft Guide Insert. 
985-101P25 –Shaft guide insert, 1/2 inch 25 Pk 
(Factory installed with GDE/GLB 
Series).  
 
EA1246R1
Terminal Plug
(To TEC)
 
Figure 7. 
985-132:  Floating input cable for use only with the 
Siemens Building Technologies, Inc. 
Terminal Equipment Controller (TEC), 3 ft,
12 pk. 
 
EA1251R1
 
Figure 8. 
985-131: Floating input cable; 3 ft, 12 pk. 
 
EA1248R1
 
Figure 9. 
985-134: Daisy chain cable 12 ft, 12 pk. 
985-135: Daisy chain cable 25 ft, 12 pk. 
Actuator 
Components 
80 70 60
2010
Aux Switch
Adjustment 
A        B
50
90
90
45
EA0642R3
1
2
12
10
8,9
11
6
13
34
5
7
 
Figure 10.  Parts of the Actuator. 
Legend 
1. Base plate 
2.  Positioning scale for angle of 
rotation 
3.  Connection cables  
4. Connection cables 
5. Manual override 
6. Coupling bushing 
7.  Factory installed 1/2-inch guide 
8.  Auxiliary switch A  
9.  Auxiliary switch B  
10. Position indicator  
11. Adjustment lever with locking 
screw (4 mm hex) 
12. Set screw for mechanical range 
stop (4 mm hex) 
13. Mounting bracket