M9106-xGx-2 Series Electric Non-Spring Return Actuators Installation Instructions
3
Less than 90 Degrees
If the damper shaft rotation is less than 90°, the
rotation range of the actuator has to be adjusted with
the scale on the actuator cover. (See Figure 5.)
90
60
30
0
0
90
30
60
End-stops (2)
Coupler Set
Screw
Damper
Shaft
End-stop
Set Screws
(2)
Stop Gear
Figure 5: Setting the Rotation Range
Use the center of the coupler set screw as a pointer to
observe the position on the scale when rotating the
coupler from one side to the other.
Examples:
•
For a rotation range of 90°, move both end-stop
set screws fully up as shown in Figure 5.
•
To set a rotation range of 60°, leave one end-stop
set screw fully up, and adjust the other set screw
so the coupler rotates between the 30 and 90°
indicator marks on the scale.
•
For a rotation range of 45°, adjust both end-stop
set screws so the coupler rotates between the
30 and 75° indicator marks on the scale.
•
To set a rotation range of 30°, move both end-stop
set screws so the coupler rotates between the
30 and 60° indicator marks on the scale.
To accurately set the end stops:
1. Press and hold the gear release lever. Turn the
actuator coupler to the minimum rotation position
for the minimum ventilation flow required.
2. Release the gear release lever.
3. Use a No. 2 Phillips screwdriver to loosen the
end-stop set screw on the actuator that is closest
to the stop gear, and move it in its slot so it is tight
against the stop gear. (See Figure 5.)
IMPORTANT:
Do not remove the end-stop
set screws, as this could interfere with the actuator’s
operation.
4. Repeat Steps 1 through 3 to set the desired
maximum rotation position.
5. Tighten both end-stop set screws to a minimum of
25 lb
∙in (2.8 N∙m).
6. Turn the actuator coupler and the damper shaft to
the minimum rotation position.
Setup and Adjustments
Direction of Action
In the Direct Acting (DA) mode, a minimum control
signal drives the actuator to the full CCW position, and
a maximum control signal drives it fully CW. For
Reverse Acting (RA) operation, a minimum control
signal drives the actuator to the full CW position, and a
maximum control signal drives it fully CCW. To set an
actuator for RA, proceed to the appropriate section for
the actuator model.
Floating Application:
AGx and IGx Models
For CW rotation and RA operation, apply 24 VAC to
the Common (COM) and CW Terminals. For CCW
rotation and DA operation, apply 24 VAC to the COM
and CCW Terminals. (See Figure 6.)
CW
COM
CCW
Figure 6: Direction of Action on
AGx and IGx Model
On/Off Application: IGx Model Only
Drive the IGx model as an On/Off actuator by wiring
continuous 24 VAC power to the COM and
CW Terminals. At the same time, command the
actuator to open by powering the CCW Terminal with
24 VAC. To drive the actuator back to the full CW
position, remove the 24 VAC signal from the CCW
Terminal.