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Dodge Engineering & Controls, Inc.
Toll Free (877) 334-2875 Fax: (978) 244-1422
Installation
EN221 and EN310 Non-Spring Return Electronic Actuators
Manual Override
To move the damper blades without power present,
do the following:
1. Hold down the PUSH button.
2. Make adjustments to the damper position.
3. Release the PUSH button.
NOTE: If there is no load, the actuator will hold the
new damper position. If load conditions
exist, the actuator might not be able to
hold.
Once power is restored, the actuator returns to
automated control.
EA0666R1
PUSH
PUSH
1
3
2
PUSH
L > 3 in.
77mm
L < 3 in.
77mm
3
2
PUSH
Figure 8. Manual Override for Long and Short Damper
Shafts.
EA0686R1
1
2
Mechanical Range Adjustment
The angular rotation is adjustable between 0° and
90° at 5-degree intervals.
1. Loosen the shaft adapter from the damper shaft
and remove the actuator from the damper shaft.
2. Remove the clip and shaft adapter from the
actuator. See Figure 9.
PUSH
Figure 9.
3. Return the actuator gear train to the "0" position
using the steps which follow for the clockwise or
counterclockwise damper shaft rotation.
Clockwise-to-open:
a. Insert the shaft adapter to the right as close as
possible to the raised stop. Figure 10.
90
90
EA0674R1
PUSH
Figure 10.
b. Hold down the PUSH button and rotate the shaft
adapter to the left until it stops. Figure 11.
90
90
EA0675R1
PUSH
Figure 11.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the left
raised stop, remove the adapter and insert it
against the left stop.
e. Place the position indicator to the "0" position on
the outside scale. Figure 12.
Counterclockwise-to-open:
a. Insert the shaft adapter to the left as close as
possible to the raised stop.
b. Hold down the PUSH button and rotate the shaft
adapter to the right until it stops.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the
right raised stop, remove the adapter and insert
it against the right stop.
e. Place the position indicator to “0” on the inside
scale.
UL Doc. No. 129-272 EAI/EN-4 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005