EN221 and EN310 Non-Spring Return Electronic Actuators
b
a
EA0662R1
PUSH
c
e
Figure 1. Parts of the EN221 and EN310 Actuators.
Product Description
This installation instruction describes the steps for
direct-coupled mounting of the EN221 and EN310
series non-spring return (NSR) electronic actuators.
Product Numbers
EN221x
EN310x
Installation Conventions
WARNING:
CAUTION:
Personal injury or loss of life may
occur if you do not follow the
procedures as specified.
Equipment damage or loss of
data may occur if you do not
follow procedure as specified.
Required Tools
• 10 mm (13/32-inch) open-end wrench
• Drill
- 4 mm (5/32-inch) drill bit
• Phillips screwdriver
• Marker or pencil
• Adjustable pliers
a. Actuator
b. U-bolt shaft adapter
d
c. Position indicator
d. Shaft adapter locking
g
clip
e. Position indicator
f
adapter
f. Mounting bracket
g. Mounting screws
Prerequisite
The actuator is shipped from the factory with a 5°
pre-load to ensure tight close-off of the damper. To
release the pre-load, press the PUSH button before
mounting the actuator.
Installation
WARNING:
NOTE: You must place the actuator on the
damper shaft so that the front of the
actuator is accessible. The label and the
manual override button are on the front
side.
1. Place the actuator on the damper shaft with the
front of the actuator accessible. The label and
the manual override button are on the front side.
2. For the EN221B2x and EN310B2x only:
Determine the rotation of the damper shaft. Set
the direction of rotation arrow to match the
rotation.
Do not open the actuator.
EA0320R2
Expected Installation Time
30 minutes
CLOCKWISECOUNTER CLOCKWISE
Figure 2. Direction of Rotation Switch.
3. For all models: See Figure 3 and Figure 4 for
clockwise-to-open (CW) installation. See Figure
5 and Figure 6 for counterclockwise-to-open
(CCW) installation.
UL Doc. No. 129-272 EAI/EN-1 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005
Dodge Engineering & Controls, Inc.
Installation
Toll Free (877) 334-2875 Fax: (978) 244-1422
EN221 and EN310 Non-Spring Return Electronic Actuators
For Tandem Applications
• The direction of rotation switches must be
set identically on both actuators according to
the clockwise or counterclockwise rotation of
the damper shaft. The factory setting is
clockwise.
• Minimum damper drive shaft length is four
inches (100 mm).
EA0870R1
Figure 3. Shaft Adapter Placement for Clockwise Rotation on Short and Long Shafts.
1
>20mm
>3/4 in
1
LONGER
SHAFTS
>77 mm
>3 in
<
77 mm
<3 in
SHORTER
SHAFTS
CAUTION:
No more than three actuators are to be used
in tandem applications.
NOTE: EN310B2, containing offset and span
features, cannot be used in a tandem
application.
d
3
b
2
a
2
a
PUSH
SHAFT
ADAPTER
3
d
b
ALIGNMENT
MARK
4
e
PUSH
c
4
PUSH
90
90
Note:
Place the shaft
adapter next to
the alignment
c
5
PUSH
mark keeping
the mark visible.
4
3
1
2
EA0355R1
PUSH
EA0295R1
4
3
PUSH
Figure 4. Mount the Actuator to the Damper Shaft. Go to Figure 7 to Complete the Mounting.
UL Doc. No. 129-272 EAI/EN-2 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005
Dodge Engineering & Controls, Inc.
Installation
Toll Free (877) 334-2875 Fax: (978) 244-1422
EN221 and EN310 Non-Spring Return Electronic Actuators
d
c
4
PUSH
90
c
5
PUSH
>20mm
>3/4 in
1
EA0869R1
LONGER
SHAFTS
1
>77 mm
>3 in
<
77 mm
<3 in
SHORTER
SHAFTS
3
b
2
a
b
2
a
PUSH
SHAFT
ADAPTER
90
3
d
ALIGNMENT
MARK
4
e
PUSH
Figure 5. Shaft Adapter Placement for Counterclockwise Rotation on Short and Long Shafts.
6
5
PUSH
PUSH
90
90
7
6
PUSH
PUSH
NOTE:
Place the shaft
adapter next to the
alignment mark
keeping the mark
visible.
1/2
1/2
5
44
3
EA0356R1
2
PUSH
EA0362R1
1
Figure 6. Mount the Actuator to the Damper Shaft. Figure 7. Attach the Mounting Bracket.
Place the actuator on the shaft with the damper blades in the desired 0 position.
Tighten the middle screw so that the shaft is in the center of the shaft adapter opening.
3
PUSH
f
EA0357R2
g
6
4 mm
5/32 in.
2 PLACES
UL Doc. No. 129-272 EAI/EN-3 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005
Dodge Engineering & Controls, Inc.
Toll Free (877) 334-2875 Fax: (978) 244-1422
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.
3
Installation
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
PUSH
EA0674R1
Figure 10.
b. Hold down the PUSH button and rotate the shaft
adapter to the left until it stops. Figure 11.
3
2
PUSH
PUSH
EA0666R1
L > 3 in.
77mm
1
L < 3 in.
77mm
Figure 8. Manual Override for Long and Short Damper
Shafts.
2
PUSH
PUSH
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.
1
2
PUSH
EA0686R1
Figure 9.
90
90
PUSH
EA0675R1
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
Dodge Engineering & Controls, Inc.
Installation
Toll Free (877) 334-2875 Fax: (978) 244-1422
EN221 and EN310 Non-Spring Return Electronic Actuators
A
N
G
L
E
O
F
R
O
T
A
T
I
O
90
N
90
PUSH
EA0676R1
Figure 12.
4. Determine the angle of rotation for the damper
blade shaft. Subtract that amount from 90°.
5. Remove the shaft adapter and insert it with the
position indicator pointing to mark on the scale
calculated in the previous step. Figure 13.
Mounting for NEMA 2 Rating
NEMA 2
<
EA1152R1
Figure 14. Acceptable NEMA 2 Mounting Position
for Single and Tandem Applications.
90
90
90
PUSH
EA0677R1
Figure 13.
6. Attach the clip.
7. Rotate the damper blade shaft to its "0" position.
8. Return the actuator to the damper shaft and
tighten the shaft adapter to the damper shaft.
0
9
<
90
Dual Auxiliary Switch (-S option)
Actuator rotary range with the shaft adapter mounted at
-5° 0°10°20°30°70°80°90°
0°10°20°30°70°80°90°
EA0413R2
A
B
Figure 15.
UL Doc. No. 129-272 EAI/EN-5 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005
position 0.
Setting range for Switches A and B: 0 - 90°
Setting interval: 5°
Switching hysteresis: 2°
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