Installation Instructions

Document No. 129-367

May 13, 2021

Siemens Industry, Inc. Page 3 of 7

Figure 8. Attaching the Mounting Bracket.

Manual Override

To move the damper blades and lock the position with

no power present, do the following:

1. Slide the red manual override knob toward the

back of the actuator. See figure 9.

2. Make adjustments to the damper position.

3. Slide the red manual override knob toward the

front of the actuator.

Once power is restored, the actuator returns to

automated control.

Figure 9. Manual Override.

Dual Auxiliary Switch Setting

For GDE/GLB 136x, GDE/GLB164x and

GDE/GLB166x only.

Factory setting: A = 5° B = 85°

Use a flat-blade screwdriver to adjust the A switch.

The long arm of the † points to the setting. Manually

turn the red ring of the B switch. The narrower tab on

the ring points to the setting. See Figure 10.

The auxiliary switch setting shafts rotate with the

actuator.

NOTE: The scale is valid only when the actuator is in

the "0" position on clockwise motion.

Figure 10. Auxiliary Switch Setting Dial.

Mechanical Range Adjustment

Figure 11. Moving the Mechanical Range Stop.

1. Loosen the stop set screw.

2. Move it along the track to the desired position, and

fasten it in place.

Mechanical Range Limitation and

Self–adapt Feature

1. To use the entire 0 to 10V input signal to control

the adjusted range, raise the tab located on the

lower left-hand side of the actuator and locate the

DIP switches. See Figure 12.

2. Set the self-adapt DIP switch to (ON).

3. Close the tab over the DIP switches.

For example, if you set the locking screw at 70° and

turn the self-adapt switch ON, a 5V input signal will

drive the damper to 35° (50% of its adjusted range).