Dodge EN310, EN221 User Manual

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

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

CLOCKWISE COUNTER 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 [phone] Fax: [phone]

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 [phone] Fax: [phone]

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

4 4

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 [phone] Fax: [phone]

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 [phone] Fax: [phone]

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°

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

EN221 and EN310 Non-Spring Return Electronic Actuators

Factory setting:

Switch A 5°
Switch B 85°

To change the settings of A and B:

• Make sure the actuator is in the 0 position. The
scale is valid only in the 0 position.

• Use a flat-blade screwdriver to turn the switch
adjustment dials to the desired setting at which a
signal is to be given.

Figure 16. Dual Auxiliary Switch Dials.

Zero Span Control Signal Adjustment (-ZS option)

The offset (start point) and
span of the control signal
can be adjusted. The offset,
U0, (start point) can be
adjusted between 0 to
5 VDC. The span, ∆U, can
be adjusted between 2 to
30 VDC.

Y

(%)

S

100

0

2 5 10 35

EA0411R1

U

O

U (max. 30 V)

∆

Ys Mechanical positioning range

(100% = angle of rotation 90°)
Yu Control signal
U0 Offset (start point)
∆U Span

EA0304R1

2)1) 3)

SWITCH

YU (v)

AUX

ADJ

Installation

10

20

A

40

70

20

90

30

B

80

40

70

50

60

Control
Signals

Span, U

5

2

10

15

20

30

25

Offset, Uo

1

0

2

3

5

4

Uo

U

Examples above:

Ex. 1. U0 = 0V, ∆U = 2V The minimum working

range for Ys = 100%.

Ex. 2. U0 = 5V, ∆U = 30V The maximum working

range for Ys = 100%

EA0287R1

Ex. 3. U0 = 0V, ∆U = 10V Factory setting

Figure 17. The Minimum, Factory Setting, and Maximum

Control Signal Adjustment.

Figure 18. Setting for

10V Span, 0 Offset.

Example:

Open the actuator from 0% to 50% (45°) using a control signal of Umin = 2V to Umax = 10V.
Calculating the value of ∆U:

50

2)(10 x 100

−

V16

min) Umax (U %] [ 100

U =

=∆

−

=

% in rotation of angle Working

UL Doc. No. 129-272 EAI/EN-6 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

EN221 and EN310 Non-Spring Return Electronic Actuators

Settings:
Offset U0 = 2, Span: ∆U = 16V
Umin = minimum control signal
Umax = maximum control signal

Installation

Y

(%)

S

100

50

Wiring

• All wiring must conform to NEC and local codes
and regulations.

• Use earth ground isolating step-down Class 2
transformers. Do not use auto transformers.

• The maximum rating for a Class 2 step-down
transformer is 100 VA. Determine the supply
transformer rating by summing the total VA of all
actuators and components used. It is
recommended that no more than 10 actuators
are powered by one transformer.

CAUTION:

Do not parallel wire EN221/EN310
actuators with any other type of
actuator, including EN221/EN310
actuators with date codes earlier than

501.

0

EA0412R1

218

o

U

min

U

10

∆U (16 V)

U

max

YU (v)

Figure 19. Example.

WARNING:

Mixed switch operation is not permitted
to the switching outputs of both
auxiliary switches (A and B).

Either AC line voltage from the same
phase must be applied to all six outputs
of the dual auxiliary switches, or UL­Class 2 voltage must be applied to all
six outputs.

NOTE: With plenum cables, only UL-

Class 2 voltage is permitted.

Three-Position Control

If the damper blades turn counterclockwise (CCW)
to open, reverse the 6 and 7 wires at the controller
(see Table 1).

NEUT

EA0683R1

7 (ORANGE)

6 (VIOLET)

24
Vac

EARTH GROUND

ISOLATING CLASS 2

TRANSFORMER FOR

24 Vac POWER

120 Vac

1 (RED)

Figure 20. Three-Position Control.

UL Doc. No. 129-272 EAI/EN-7 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

Three-Position Control (24 VAC)

M

1

7

S2 S3 S5 S6

Figure 21.

Function

S1

A

S4

B

Orange

6

PL0009R1

Table 1. Three-Position Control 24 VAC.

Standard

Symbol

1 (+) Red

6 Control signal clockwise Violet

7

S1 Switch A Common Gray/red

S2 Switch A NC Gray/blue

S3 Switch A NO Gray/pink

S4 Switch B Common Black/red

S5 Switch B NC Black/blue

S6 Switch B NO Black/pink

Control signal
counterclockwise

Color

Plenum

Modulating Control (24 VAC)

8

EA0284R1

Table 2. Modulating Control 24 VAC.

Standard

Symbol

1

(+)

2 Com Black

8 0 to 10 VDC input signal Gray

Output for 0 to 10 VDC

9

position indication

S1 Switch A Common Gray/red

S2 Switch A NC Gray/blue

S3 Switch A NO Gray/pink

S4 Switch B Common Black/red

S5 Switch B NC Black/blue

S6 Switch B NO Black/pink

9

M

1

2

Figure 22.

Function

S1

A

S2 S3 S5 S6

B

Red

Pink

S4

Color

Plenum

UL Doc. No. 129-272 EAI/EN-8 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

Start-Up/Commissioning

Three-Position Control, 24 VAC

1. Check that the wires are connected correctly.

2. Connect wires 1 (red) and 6 (violet) to a Digital Multimeter (DMM) with the dial set at VAC. Apply a control
signal (24 VAC) to wire 6 to verify that the operating voltage is within range.

3. Connect wires 1 (red) and 7 (orange) to a DMM with the dial set at VAC. Apply a control signal (24 VAC) to
wire 7 to verify that the operating voltage is within range.

4. Check operation:
a. Connect wire 1 (red) to the actuator.
b. Apply a control signal (24 VAC) to wire 6 (violet).
c. Allow the actuator shaft coupling to rotate from 0 to 90°.
d. Stop applying a control signal (24 VAC) to wire 7 (orange).
e. Apply a control signal (24 VAC) to wire 7 (orange).
f. Allow the actuator shaft coupling to rotate from 90 to 0°.

5. Check auxiliary switch A (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S1 and S3 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a 24 VAC signal to wire 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.
d. Stop applying a control signal to wire 6 (violet).
e. Connect wires S1 and S2 to the DMM. The DMM should indicate an open circuit or no resistance.
f. Apply a 24 VAC signal to wire 7 (orange).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.

6. Check auxiliary switch B (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S4 and S6 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a 24 VAC signal to wire 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.
d. Stop applying a control signal to wire 6 (violet).
e. Connect wires S4 and S5 to the DMM. The DMM should indicate an open circuit or no resistance.
f. Apply a 24 VAC signal to wire 7 (orange).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.

Service

WARNING:

Do not open the actuator. If the actuator is inoperative, replace the unit.

UL Doc. No. 129-272 EAI/EN-9 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

Modulating Control, 24 VAC

1. Check that the wires are connected correctly.

2. Check that the offset (start point) and span are set correctly, if used.

3. Check that the direction of rotation switch matches the rotation of the damper shaft.

4. Connect wires 1 (red) and 2 (black) to a Digital Multimeter (DMM) with the dial set at VAC to verify that the
operating voltage is within range.

5. Check operation:
a. Connect wires 1 (red) and 2 (black) to the actuator.
b. Set the DMM dial to VDC for the actuator input signal.
c. Connect wires 2 (black) and 8 (gray) to DMM.
d. Apply a full scale input signal (10 VDC) to wire 8 (gray).
e. Allow the actuator shaft coupling to rotate from 0 to 90°.
f. Disconnect wire 8 (gray) and the shaft coupling returns to the 0 position.

6. Check feedback:
a. Set the DMM dial to VDC.
b. Attach wires 2 (black) and 9 (pink) to the DMM.
c. Apply a full scale input signal to wire 8 (gray).
The reading at the DMM should increase.
d. Remove the signal from wire 8 (gray) and the reading at the DMM should decrease and the actuator shaft

coupling returns to the 0 position.

7. Check auxiliary switch A (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S1 and S3 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a full scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.
d. Connect wires S1 and S2 to the DMM. The DMM should indicate an open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
f. The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.

8. Check auxiliary switch B (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S4 and S6 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a full scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.
d. Connect wires S4 and S5 to the DMM. The DMM should indicate an open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.

Service

WARNING:

Do not open the actuator. If the actuator is inoperative, replace the unit.

UL Doc. No. 129-272 EAI/EN-10 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dimensions

min. 4 in.

100 mm

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

EN221 and EN310 Non-Spring Return Electronic Actuators

9

2 1/4 in.

57 mm

1-1/8 in.

28 mm

5

˚

Installation

min. 1/4 in.

7 mm

PL0132R1

1-11/32

34 mm

1-11/32

34 mm

min. 8 in.

200 mm

min. 2-1/2 in.

60 mm

11 in.

279 mm

7-3/4 in.
197 mm

3-3/8 in.

86 mm

3-15/16 in.

100 mm

1.1 in.

28.5 mm

OPENING

FOR 3/8"

FLEX CONDUIT

(3 PLS)

11/32 in.

10 mm

1-23/32 in.

30 mm

Figure 23. Dimensions of the EN221 and EN310 Actuator and Mounting Bracket.

9 in

230 mm

EA0249R2

25/32 in

20 mm

UL Doc. No. 129-272 EAI/EN-11 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Installation

Toll Free [phone] Fax: [phone]

EN221 and EN310 Non-Spring Return Electronic Actuators

9 in.

230 mm

EA0768R1

3 1/8 in.

78 mm

3 5/8 in.
92 mm

ASK73.1U

1/2 in.

13.5 mm

1 13/16 in.

46 mm

9 in

230 mm

EA0249R2

25/32 in

20 mm

985-006

Figure 24. Dimensions of the Mounting Brackets used in Tandem Applications in Inches (Millimeters).

9

5

∞

min. 1/4 in.

7 mm

min. 4 in.

100 mm

2 1/4 in.
57 mm

11 in.

279 mm

min.
1/4 in.
7mm

min. 8 in.

200 mm

7-3/4 in.
197 mm

1-11/32

1-11/32

1-11/32

PL0131R1

34 mm

34 mm

34 mm

1-11/32

34 mm

min. 2-1/2 in.

60 mm

3-15/16 in.

100 mm

1.1 in.

28.5 mm

OPENING
FOR 3/8"

FLEX CONDUIT

11/32 in.

10 mm

1-23/32 in.

30 mm

Figure 25. Dimensions and Service Envelope of the Actuators in Tandem Application in Inches (Millimeters).

UL Doc. No. 129-272 EAI/EN-12 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

Sizing Actuators for Damper Applications

The number of actuators required depends on several factors. To determine the quantity of actuators required for
the installation:

• Obtain damper torque ratings (ft-lb/ft

• Determine the area of the damper.

• Calculate the total torque required to move the damper:

Total Torque = Torque Rating x Damper Area

• Select the total quantity of actuators, required:

Number of Actuators =

Total Damper Torque required

(see note

SF

below)

2

or Nm/m2) from the damper manufacturer.

x

Actuator T orque

(refer to

specifications)

NOTE: When calculating the number of actuators required, a safety factor (SF) should be included for

unaccountable variables such as slight misalignments, aging of the damper, etc. A suggested
safety factor is 0.80 (or 80% of the rated torque).

• Mechanical coupling of the actuator is allowed if:

− The same type of actuator is used.

− The power trunk can handle added components.

− The same control input goes to both actuators (parallel wiring).

UL Doc. No. 129-272 EAI/EN-13 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

ACCESSORIES

NOTE: The auxiliary switches and/or the control signal adjustment cannot be added in the field. Order the

product number that includes the option(s), if required.

ASK71.1U This kit allows foot mounting of the
actuators. This kit should be used for in-the-airstream
applications, and generally, anywhere a foot-mounted
actuator can be mounted.

This kit contains a crank arm that changes the angular
rotation into a linear stroke, a support bearing ring to
minimize side loading on the actuator’s output bearing,
a mounting bracket, and required mounting fasteners.

EA0477R2

(4 each)

Figure 1. Floor Mount Kit.

EA0476R2

Figure 2. Frame Mount Kit.

EA0495R1

Figure 3. Crank Arm Kit.

EA0494R1

Figure 4. Crank Arm Kit with Mounting Bracket.

ASK71.2U This kit allows mounting of the actuators

directly to a damper frame. This kit should be used with
louvers and vents and in applications where use of the
floor mount kit is not possible.

This kit contains a crank arm that changes the angular
rotation into a linear stroke, a support bearing ring to
minimize side loading on the actuator’s output bearing,
a mounting bracket, and required mounting fasteners.

ASK71.3 This kit allows a direct coupled actuator to
provide an auxiliary linear drive. This crank arm kit can
be used to simultaneously drive a set of opposing or
adjacent dampers with a single actuator.

This kit includes a crank arm that attaches to the
splined hub of the shaft adapter, and other required
mounting fasteners.

ASK71.4 This kit allows economical mounting of an
actuator to a variety of surfaces. This kit should be
used in applications where the actuator can be rigidly
surface mounted and a linear stroke output is required.

This kit includes a crank arm that attaches to the
splined hub of the shaft adapter, a mounting bracket,
and other required mounting fasteners.

UL Doc. No. 129-272 EAI/EN-14 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone] Fax: [phone]

Installation

EN221 and EN310 Non-Spring Return Electronic Actuators

ASK73.1 This bracket provides an extended anti-

rotation pin that allows two 3-position EN310 actuators
to directly drive a single damper shaft.

EA0496R1

Figure 5. Tandem Mount Bracket.

985-004 The self-centering shaft adapter will attach to

a shaft up to 1.00 inch (25.4 mm) in diameter. (The
special shaft adapter will attach to a 1.05-inch
(26.6-mm) diameter shaft.) This shaft adapter is
13/16-inch (20 mm) taller than the height of the special
shaft adapter.

EA0498R1

Figure 6. Self Centering Shaft Adapter.

Service Parts

EA0499R1

985-003

Position indicators (package of 10).

EA0497R1

ASK74.1U

Special-Shaft Adapter.

Figure 7. Orderable Parts.

EA0500R1

985-006

Anti-rotation (mounting) bracket.

UL Doc. No. 129-272 EAI/EN-15 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005

Dodge Engineering & Controls, Inc.

Toll Free [phone]

EN221 and EN310 Non-Spring Return Electronic Actuator

Installation Guide

General Installation ..................................................................................................EAI/EN – 1

Mounting...................................................................................................................EAI/EN – 1-3

Manual Override .......................................................................................................EAI/EN – 4

Mechanical Range Adjustment.................................................................................EAI/EN – 4-5

Mounting for NEMA 2 ...............................................................................................EAI/EN – 5

Dual Auxiliary Switch (-S option) ..............................................................................EAI/EN – 5-6

Zero Span Control Signal Adjustment (-ZS option)..................................................EAI/EN – 6-7

Wiring........................................................................................................................EAI/EN – 7

General ..............................................................................................................EAI/EN – 7

Transformer........................................................................................................EAI/EN – 8

Three-Position (Floating) Control (24 VAC).......................................................EAI/EN – 8

Modulating Control (24 VAC) .............................................................................EAI/EN – 8

Start-up/Commissioning ...........................................................................................EAI/EN – 9

Three-Position (Floating) Control (24 VAC).......................................................EAI/EN – 9

Modulating Control (24 VAC) .............................................................................EAI/EN – 10

Actuator Dimensions ................................................................................................EAI/EN – 11-12

Actuator Sizing for Dampers.....................................................................................EAI/EN – 13

Accessories ..............................................................................................................EAI/EN – 14-15

Item Number 129-272-05, Rev. 010

196 Riverneck Road, Chelmsford, MA 01824 Tel: [phone] Fax: [phone]