Distech Controls DA-088N Series Manual

Hardware Installation Guide

DA-088N Series

Damper Actuator, 88lb.-in., Non-Spring Return, 24V

Figure 1: DA-088N Series Damper Actuator

Product Description

This document describes the hardware installation procedures for the

direct-coupled mounting of the DA-088N Series damper actuators.

General Installation Requirements

For proper installation and subsequent operation of each actuator, pay

special attention to the following recommendations:

- Upon unpacking the product, inspect the contents of the carton for

shipping damages. Do not install damaged actuators.

- Avoid areas where corroding, deteriorating or explosive vapors,

fumes or gases may be present.

- Ensure that all equipment is installed according to local, regional,

and national regulations.

Personal injury or loss of life may occur if you do not follow a

procedure as specified.

Equipment damage or loss of data may occur if you do not

follow a procedure as specified.

Take reasonable precautions to prevent electrostatic

discharges to the controller when installing, servicing or

operating the controller. Discharge accumulated static

electricity by touching one’s hand to a well-grounded object

before working with the controller.

Product Parts

a) Actuator

b) Position indicator

c) Mounting bracket

d) Mounting screws

e) 4 mm hex key

f) Shaft insert for use with 3/8-inch (8-10 mm) shafts

2/14

Product Components

Actuator Components

Figure 2: Parts of the Actuator

1. Base plate

2. Positioning scale for angle of

rotation

3. Slope adjustment

4. Offset (start point) adjustment

5. DIP switches

6. Cover for DIP switches

7. Connection cables

8. Connection cables

9. Manual override

10. Coupling bushing

11. Factory installed 1/2-inch

guide

12. Auxiliary switch A

13. Auxiliary switch B

14. Position indicator

15. Adjustment lever with locking

screw (4 mm hex)

16. Set screw for mechanical

range stop (4 mm hex)

17. Mounting bracket

Instructions

Estimated Installation Time

30 minutes

Required Tools

- 4 mm hex wrench

- 4 mm (5/32-inch) drill bit and drill

- Small flat-blade screwdriver

- Marker or pencil

Do not open the actuator.

Place the actuator on the damper shaft so that the front

of the actuator is accessible. The label is on the front

side. A mounting bracket is included with the actuator.

1. Determine whether the damper blades will rotate clockwise or

counterclockwise to open. See Figure 3.

2. If the blades will rotate counterclockwise, slide the manual override

switch to manual, and move the adjustment lever to the right.

Return the switch to automatic. See Figure 17.

To mount a (modulating) DA-088N024Pxxxx, set the Dual In-line

Package (DIP) switches to the required positions.

1. To access the DIP switches, raise the tab on the lower left side of

the actuator. See Figure 3. The factory setting is clockwise (middle

switch), with a direct-acting feedback signal (right switch).

2. Close the tab over the DIP switches.

To mount a (3-positon) DA-088N024Fxxxx for counter-clockwise

rotation, follow the Counterclockwise Damper Rotation instructions

located in the Wiring Diagrams section when wiring the actuator to the

controller.

Figure 3. Setting the Direction of Rotation.

Mounting and Installation

Damper Shaft Sizes

- The minimum damper drive shaft length is 3/4-inch (20 mm).

- Observe the service envelope around the actuator as shown in

Figure 25.

- Detailed mounting instructions are included with each actuator.

1/2-inch Ø:

Actuators come with

a factory installed

1/2-inch shaft guide..

If shaft size is 1/2-

inch, proceed with

Figure 7.

3/8-inch Ø:

Use the shaft insert supplied

for any 3/8-inch (8 to 10mm)

diameter shaft

5/8-inch Ø

For all damper shafts with the exception of the 1/2-inch

round shaft: Remove 1/2-inch Ø guide before

installation.

When using a 3/8-inch shaft: Remove factory installed 1/2-inch guide.

See Figure 4.

3/14

Figure 4. Removing 1/2-inch Ø shaft guide for 3/8-in or 5/8-in shaft.

Figure 5. 3/8 Ø inch shaft, see Figure 2, Item f.

1. A 3/8-inch shaft adapter is provided in actuator package.

2. Hold the shaft insert so that the raised tabs are inserted last when

placing the insert into the back of the actuator.

3. Proceed to Figure 7.

When using a 5/8-inch shaft:

Figure 6. 5/8 Ø inch shaft.

1. Remove factory installed 1/2-inch guide. See Figure 4.

2. Mount actuator to shaft per Figure 7.

Figure 7. Mounting Actuator to Damper Shaft.

Figure 8. Installing the Position Indicator (b).

Figure 9. Attaching the Mounting Bracket.

Operation

A continuous 0 to 10 Vdc signal from a controller to wire 8 (Y) operates

the damper actuator. The angle of rotation is proportional to the control

signal. A 0 to 10 Vdc position feedback output signal is available

between wire 9 (U) and wire 2 (G0) to monitor the position of the

damper motor.

In the event of a power failure, the actuator holds its position. In the

event that only the control signal is lost, the actuator returns to the "0"

position.

Life Expectancy

An improperly tuned loop will cause excessive repositioning that will

shorten the life of the actuator.

4/14

Control signal adjustment

DA-088N024PAXXP and DA-088N024PA2XP: For sequencing and

the electronic limitation of the angle of rotation.

- Use the Uo potentiometer to set the offset (start point) between 0

to 5 Vdc.

- Use the U potentiometer to set the slope (span) between 2 to 30

Vdc.

The Y input is limited to a maximum of 10 Vdc. If the

sum of the offset and slope setting is greater than 10V,

the angle of rotation is reduced providing the feature of

electronic limitation of the angle of rotation.

Figure 10.

Ys: Actuator position (100% = angle of rotation

90°*)

Y: Control input signal

Uo: Offset (start point)

U: Slope

Uw: Active voltage range (Ys changes)

*When the mechanical limitation of the angle of

rotation and self-adapt function are ON, 100% does

not equal 90°.

Setting for

10V slope

0 Vdc offset

Figure 11.

Examples in

Figure 10

Offset

Vdc

U

Slope

Vdc

Active Voltage

Range

Vdc

Actuator

Position

Minimum slope

0 to 2

0 to 100%

Limitation of

rotation

5 to 10

0 to 16.7%

Limitation of

rotation

0 to 10

0 to 33.3%

Setting shown in

Figure 14

0 to 10

0 to 100%

Control signal adjustment example:

Determine the setting needed to electronically limit the angle of

rotation between 0 to 50% (0 to 45°) using a 2 to 10 Vdc input.

Calculating the value of U:

VdcVdcVdcVdcUoVdc

[%]

U16)210(

%50%100

])[][10(

[%]Ysrotationof

angleworking

100 

Settings: Uo = 2 Vdc; U = 16 Vdc

Electronic limitation:

- Angle of rotation: Ys = 50% (45°)

- Slope: U = 16V

- Active voltage range: Uw = 2 to 10 Vdc

5/14

Figure 12.

Auxilliary Switches

DA-088N024PA2XP and DA-088N024PX2XP

Figure 13 shows the adjustable switching values for auxiliary switches

A and B.

Figure 13. Adjustable Switching Values for the Dual

Auxiliary Switches.

The auxiliary switch setting shafts rotate with the

actuator. The scale is valid only when the actuator is in

the "0" position on clockwise motion

Use the long arm of the † (AUX SWITCH ADJUSTMENT) to point to

the position of switch A. Use the narrower tab on the red ring to point to

the position of switch B.

Dual in-Line Package (DIP) Switches

For: DA-088N024PXXXP

Raise the protective cover from left to right to locate the DIP switches.

See Figure 2 for the location of the cover.

The factory setting is 0 (OFF).

When mechanical angle of rotation is limited, the self-adapt switch may

be turned ON so that the limited range will become the new 0 to

100% for the actuator logic. In this case, 0 to 100% is not equal to 90°.

Figure 14. Self-adapt Switch.

When turning the self-adaptive feature on or after the

software reset with the feature on, the actuator will enter a

five-minute calibration cycle as the actuator adjusts to the

rotation limits of the system. A software reset happens after

power on or may be caused by electrostatic discharge (ESD)

at levels of 2kV and above.

The position output signal U is not influenced by the self-adapt

function. The 0 to 10V feedback signal U is always proportional to 0° to

90° (or 90° to 0°).

The factory setting is clockwise.

The direction of rotation switch should match the damper rotation

movement.

Figure 15.Direction of Rotation Switch.

The factory setting is direct acting.

As the clockwise angle of rotation increases, the output voltage

increases.

If the direction of rotation is counterclockwise, the output signal switch

should be set at reverse acting to match the direction of the rotation

switch.

Figure 16. Output Signal Switch.

Manual Override

To move the damper blades and lock the position with no power

present, do the following:

1. Slide the red manual override knob toward the back of the actuator.

See Figure 17.

2. Make adjustments to the damper position.

3. Slide the red manual override knob toward the front of the actuator.

Once power is restored, the actuator returns to automated control.

Figure 17. Manual Override.

6/14

Dual Auxiliary Switch Setting

For DA-088N024FX2XP, DA-088N024PA2XP, DA-088N024PX2XP

only.

Factory setting:

- A = 5°

- B = 85°

Use a flat-blade screwdriver to adjust the A switch. The long arm of the

†points to the setting. Manually turn the red ring of the B switch. The

narrower tab on the ring points to the setting. See Figure 18.

The auxiliary switch setting shafts rotate with the actuator.

The scale is valid only when the actuator is in the "0" position on

clockwise motion.

Figure 18. Auxiliary Switch Setting Dial.

Mechanical Range Adjustment

1. Loosen the stop set screw.

2. Move it along the track to the desired position, and fasten it in

place.

Figure 19. Moving the Mechanical Range Stop.

To use the entire 0 to 10V input signal to control the mechanically

limited range, see Figure 14 for setting self-adaptive features.

Example:

Stop set screw at 70°

Self-adapt switch ON

Input signal Y = 5 Vdc

The damper will be at 35° (50% of the adjusted range.)

Note:On versions with the slope and offset features, this example

assumes

- Offset Uo = 0 Vdc

- Slope U = 10 Vdc

Mechanical Range Limitation and

Self-Adapt Feature

1. To use the entire 0 to 10V input signal to control the adjusted range,

raise the tab located on the lower left-hand side of the actuator and

locate the DIP switches. See Figure 20.

2. Set the self-adapt DIP switch to (ON).

3. Close the tab over the DIP switches.

For example, if you set the locking screw at 70° and turn the self-adapt

switch ON, a 5V input signal will drive the damper to 35° (50% of its

adjusted range).

Factory setting 0 (OFF)

Figure 20. Self-adapt Switch in the On Position.

When turning the self-adaptive feature on, or after software

reset with the feature on, the actuator will enter a five-minute

calibration cycle as the actuator adjusts to the rotation limits

of the system. The software reset happens after power on,

or may be caused by electrostatic discharge (ESD) at levels

of 2 kV and above.

Slope (Span) and Offset Adjustment

For DA-088N024PAXXP and DA-088N024PA2XP only

Factory setting:

Slope (span) U 10

Offset Uo = 0

Use a flat-blade

screwdriver to make

adjustments. The long

arm of the †points to the

setting.

Figure 21.

7/14

Wiring

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

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

autotransformers.

The sum of the VA ratings of all actuators and all other components

transformer.

Determine the supply transformer rating by summing total VA of all

actuators used. It is recommended that one transformer power no

more than 10 actuators.

All six outputs of the dual auxiliary switch (A and B) must

only be connected to:

- Class 2 voltage (UL/CSA).

- Separated Extra-Low Voltage (SELV) or Protective

Extra Low Voltage (PELV) (according to HD384 4 41)

for installations requiring conformance.

Installations requiring Conformance

- All wiring for CE rated actuators must only be

separated extra low voltage (SELV) or protective extra

low voltage (PELV) per HD384-4-41.

- Use safety-isolating transformers (Class III transformer)

per EN 61558. They must be rated for 100% duty cycle.

- Overcurrent protection for supply lines is maximum

10A.

Wiring Diagrams

Counterclockwise Damper Rotation of DA-088N024Fxxxx

If the damper blades turn counterclockwise to open (CCW), reverse the

6 (violet) and 7 (orange) wires at the controller.

Do not wire different types of actuators (such as DA-221N

Series or DA-310N Series actuators) in parallel with these

models.

(For DA-088N floating control actuator series only) To prolong actuator

life, use a controller and/or software that provide a time-out function.

This function removes the actuator drive signal after the signal has

been on for a predefined time.

8/14

DA-088N024Fxxxx, continued

Each wire has the standard symbol printed on it. See

Table 1.

24 Vac Power Supply Floating Control.

Figure 22. Floating Control.

Table 1. 3-position Control 24 Vac.

Standard

Symbol

Function

Terminal

Designation

Color

Supply (SP)

Red

Control signal clockwise

Violet

Control signal

counterclockwise

Orange

Switch A Common

Q11

Gray/red

Switch A N.C.

Q12

Gray/blue

Switch A N.O.

Q14

Gray/pink

Switch B Common

Q21

Black/red

Switch B N.C.

Q22

Black/blue

Switch B N.O.

Q24

Black/pink

Feedback Potentiometer

0 to 100% P1 - P2

White/red

Feedback Potentiometer

Common

White/blue

Feedback Potentiometer

100 to 0% P3 - P2

White/pink

Each wire has the standard symbol printed on it. See

Table 2.

DA-088N024Pxxxx

24 Vac Power Supply, Modulating Control

Table 2. Modulating Control

Standard

Symbol

Function

Terminal

Designation

Color

Supply (SP)

Red

Neutral (SN)

Black

0 to 10V input signal

Gray

Output for 0 to 10 Vdc

position indication

Pink

Factory installed options

Switch A –Common

Q11

Black

Switch A –N.C.

Q12

Black

Switch A –N.O.

Q14

Black

Switch B –Common

Q21

Black

Switch B –N.C.

Q22

Black

Switch B –N.O.

Q24

Black

9/14

Figure 23. 0 to 10 Vdc Modulating Control.

10/14

Start-Up / Commissioning

1. Check that the wires are connected correctly.

2. Check that offset and slope are set correctly, if used.

3. Check that the direction of rotation switch/cable 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 AC V to verify that the operating voltage is within

range.

Check operation:

1. Connect wires 1 (red) and 2 (black) to the actuator.

2. Set the DMM dial to Vdc.

3. Connect wires 2 (black) and 8 (gray) to the DMM.

4. Apply a full-scale input signal (10 Vdc) to wire 8 (gray).

5. Allow the actuator shaft coupling to rotate from 0 to 90°.

6. Disconnect wire 8 (gray) and the shaft coupling returns to the “0”

position.

Check Feedback:

1. Set the DMM dial to Vdc.

2. Attach wires 2 (black) and 9 (pink) to the DMM.

3. Apply a full-scale input signal to wire 8 (gray). The reading at the

DMM should increase.

4. Remove the signal from wire 8 (gray). The reading at the DMM

should decrease and the actuator shaft coupling returns to the “0”

position.

Check the Auxiliary Switch A:

1. Set the DMM dial to ohms (resistance) or continuity check.

2. Connect wires S1 and S3 to the DMM.

The DMM should indicate open circuit or no resistance.

3. 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.

4. Connect wires S1 and S2 to the DMM. The DMM should indicate

open circuit or no resistance.

5. Stop the signal to wire 8 (gray). The DMM should indicate contact

closure as the actuator shaft coupling reaches the setting of switch

Check the Auxiliary Switch B:

1. Set the DMM dial to ohms (resistance) or continuity check.

2. Connect wires S4 and S6 to the DMM. The DMM should indicate

open circuit or no resistance.

3. 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.

4. Connect wires S4 and S5 to the DMM. The DMM should indicate

open circuit or no resistance.

5. Stop the signal to wire 8 (gray). The DMM should indicate contact

closure as the actuator shaft coupling reaches the setting of switch

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