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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
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).
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.
PUSH
1
>20mm
>3/4 in
<
77 mm
<3 in
>77 mm
>3 in
1
b
LONGER
SHAFTS
SHORTER
SHAFTS
EA0870R1
a
2
3
4
3
2
a
e
b
d
d
SHAFT
ADAPTER
ALIGNMENT
MARK
c
c
5
4
PUSH
PUSH
PUSH
90
90
EA0355R1
1
2
3
4
EA0295R1
PUSH
PUSH
3
4
Note:
Place the shaft
adapter next to
the alignment
mark keeping
the mark visible.
Figure 3. Shaft Adapter Placement for Clockwise Rotation on Short and Long Shafts.
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