Direct Coupled Damper Actuator (Spring-return Type) Specifications

AB-7143

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Specifications/Instructions

Direct Coupled Damper Actuator

(Spring-return Type) General Model MY6055B2001 direct coupled damper actuator is a motorized actuator to open/close air damper for ventilation and air-conditioning systems. Model MY6055B2001 has the spring-return function that automatically rotates the damper shaft to the damper closing position and shuts off the damper in the event of power shutdown. This is suitable for controlling air dampers in the systems requiring high safety.

Features Spring-return mechanism rotates the damper shaft to the

damper closing direction and then stops the shaft at the shutoff position.

Torque limit function protects the motor from overload.

Manual override function enables to adjust the actuator without being powered.

Rotating direction is reversible by turning the actuator

the other way around.

Brushless DC motor stabilize the operating time regardless of the size of the load.

The actuator contains two auxiliary contacts (SPDT). SPDT: Single pole, double throw

Model Numbers Model number Specification

MY6055B2001 Direct coupled damper actuator (two-position control, spring-return type, with auxiliary switches)

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Safety Instructions Please read instructions carefully and use the product as specified in this manual. Be sure to keep this manual near by for ready reference.

Usage Restrictions

This product is targeted for general air conditioning. Do not use this product in a situation where human life may be affected. If this product is used in a clean room or a place where reliability or control accuracy is particularly required, please contact oursales representative. Azbil Corporation will not bear any responsibility for the results produced by the operators.

Warnings and Cautions

WARNING Alerts users that improper handling may cause death or serious injury.

CAUTION Alerts users that improper handling may cause minor injury or material loss.

Signs

Alerts users possible hazardous conditions caused by erroneous operation or erroneous use. The symbol inside indicates the specific type of danger. (For example, the sign on the left warns of the risk of electric shock.)

Notifies users that specific actions are prohibited to prevent possible danger. The symbol inside graphically indicates the prohibited action. (For example, the sign on the left notifies that disassembly is prohibited.)

Instructs users to carry out a specific obligatory action to prevent possible danger. The symbol inside graphically indicates the actual action to be carried out. (For example, the sign on the left indicates general instructions.)

WARNING

Before wiring and maintenance, be sure to turn off the power to the product. Failure to do so might cause electric shock.

Do not disassemble the spring unit of the product. The spring unit might rapidly rotate or jump out of the actuator, resulting in serious injury.

CAUTION (1/2)

Store the products in package. Storing unpackaged products might damage or stain the products.

Do not send shock to the product. Doing so might damage the product.

Install and use the product in a location that meets the operating conditions (temperature, humidity, power, vibration, shock, mounting direction, atmospheric condition, etc.) as listed in the specifications. Failure to do so might cause fire or device failure.

Take anti-lightning measures based on regional and building characteristics. Lightning might cause fire or critical damage to the product without the anti-lightning measures.

Do not install the product in an environment with high heat radiation. High heat radiation might cause malfunction of the actuator.

Do not use the product in an atmosphere containing corrosive gas. Doing so might damage the actuator or its components.

Installation and wiring must be performed by qualified personnel in accordance with all applicable safety standards.

All wiring must comply with applicable codes and ordinances.

Provide a circuit breaker for the power to the product.

Provide a circuit protector (e.g., a fuse, cut-off device) for the control panel to ensure your safety.

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CAUTION (2/2)

If more than the rated power voltage is applied to the product, replace the product with new one for your safety. Failure to do so might cause fire.

Do not use the product for an application that requires extremely frequent open/close operations. Doing so might cause fire or device failure.

Do not place your hand around the product or bring your face close to the product. The product might rotates due to inappropriate installation, malfunction, or damage, causing injury.

Do not touch the moving parts of the product. Doing so might cause injury.

Do not disassemble the product. Doing so might cause electric shock or device failure.

Dispose of the product as industrial waste in accordance with your local regulations. Do not reuse all or part of this product.

IMPORTANT: After installation, check fully open, shut-off, and spring-return operations of the damper actuator. Check that the damper shaft is held by the shaft clamp without slipping inside the clamp, and that the actuator

is securely attached to the universal bracket when the actuator closes the damper from fully open position to fully closed position or opens the damper from fully closed position to fully open position..

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Specifications Item Specification

Rated power supply voltage 24 V AC, 50 Hz/60 Hz Operating voltage range 19.2 V AC to 28.8 V AC Power consumption Running 7 W, 7 VA

Holding 3.5 W Angle of rotation Max. 95° (Max. limit is adjustable from 33 % to 100 %.) Running time Motor (0→100 % position) Approx. 75 s

Spring return (100→0 % position) Approx. 25 s Torque Running 20 N⋅m

Holding 20 N⋅m Spring return 20 N⋅m

Environmental conditions

Rated operating conditions

Ambient temperature -20 °C to 50 °C Ambient humidity 95 %RH (non-condensing) Vibration 4.9 m/s2 (10 Hz to 150 Hz)

Transport/ storage conditions

Ambient temperature -20 °C to 60 °C Ambient humidity 95 %RH or less (non-condensing) Vibration 9.8 m/s2 (10 Hz to 150 Hz)

Protection rating IEC IP54 (dust-proof and splash-proof) with the cable conduit facing downward * Do not use the actuator outdoors exposed to rain.

Cable Power 0.75 mm2 x 2 cores, approx. 1 m long Auxiliary switch 0.75 mm2 x 6 cores, approx. 1 m long

Materials Housing Polycarbonate resin Clamp Galvanized steel Universal bracket Galvanized steel plate

Color Housing Gray Weight Approx. 2.4 kg Applicable damper shaft 10 mm to 25.4 mm, 15 mm long or longer

10 mm to 25.4 mm, 15 mm long or longer

Withstand voltage Between case and cable 1 mA or less at 500 V AC for 1 min. Insulation resistance Between case and cable 100 MΩ or higher at 500 V DC Auxiliary switches SPDT x 2 (at 10 % and 10–90 %)

1 mA to 3 (0.5) A, 250 V AC or lower (resistive load: 3A, inductive load: 0.5A)Accessories Universal bracket x 1 (Part No. 12596-00001)

Plastic bag for protection M4 tapping screws x 2 Crank handle for manual operation x 1 Installation instruction sheet (71382-00001.A) x 1

Optional items (Order separately.)

Auxiliary device Transformer (if needed) Attachment Attachment (Model Z-AF) for replacing the former models*

IEC: International Electrotechnical Commission Note: * Mounting dimensions of Model MY6055B2001 differ from the mounting dimensions of Model MY6045 series. This attachment allows to

replace Model MY6045 series with Model MY6055B2001 without changing the mounting position of the universal bracket.

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Dimensions and Maintenance Clearance

IMPORTANT: Besides the below maintenance clearance, leave enough clearance for a tool, such as a torque wrench, to

tighten the hexagonal nuts of the shaft clamp. Side view

Figure 1. Dimensions and maintenance clearance (mm): Side view

Front view

Figure 2. Dimensions and maintenance clearance (mm): Front view

Universal bracket (Part No. 12596-00001)

Figure 3. Dimensions (mm): Universal bracket

98

80

49

100

(Mai

nten

ance

cl

eara

nce)

100

(Mai

nten

ance

cl

eara

nce)

32 27 162172182236100

(Maintenance clearance)

229

4.4

20

12 5

2

7

2

R2.2R2.2

R2.2

4 4 5 10 1312

12

11.2512.75 12

22

85

59

20

6

200

(Mai

nten

ance

cle

aran

ce)

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Parts Identifications

Figure 4. Parts identifications

Setting dialfor auxiliary switches

Clamp

Insertion part

Mechanical stopper

Lock switch

Hexagonal hole for crank handle

Housing

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Installation

CAUTION

Do not send shock to the product. Doing so might damage the product.

Install and use the product in a location that meets the operating conditions (temperature, humidity, power, vibration, shock, mounting direction, atmospheric condition, etc.) as listed in the specifications. Failure to do so might cause fire or device failure.

Take anti-lightning measures based on regional and building characteristics. Lightning might cause fire or critical damage to the product without the anti-lightning measures.

Do not install the product in an environment with high heat radiation. High heat radiation might cause malfunction of the actuator.

Do not use the product in an atmosphere containing corrosive gas. Doing so might damage the actuator or its components.


IMPORTANT: • Avoid application that keeps the actuator open and close operations excessively frequent. • Meet the actuator rotating direction with the damper rotating direction. • For perfect installation, firmly tighten the screws of the actuator without loose connection. • Leave clearance for maintenance as shown in Figs. 1 and 2. Besides, leave a clearance for a tool (e.g., torque

wrench) to tighten the hexagonal nuts of the clamp. Prior to installation

1) Check the shape and size of the damper shaft. Depending on the shape and size of the shaft, the insertion part of the clamp needs to be removed. See the Removal of the clamp insertion part section.

Figure 5. Clamp types corresponding to shape and size of damper shaft

2) Check the length of the damper shaft. Installation steps differ depending on the length of the damper shaft.

3) Check the rotating direction of the damper shaft and meet the actuator rotating direction with the shaft rotating direction. Actuator mounting orientation differ depending on the damper shaft rotating direction. Spring-return direction of the actuator is indicated with "L" (left) or "R" (right) printed on the actuator front or rear face. "L" face must face the front for the counterclockwise spring-return direction, and "R" face must face the front for the clockwise spring-return direction.

10–22 mm 19–25.4 mm

Clamp with insertion part

Damper shaft Damper shaft

Clamp without insertion part

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AB-7143

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3) Attach the universal bracket (accessory) to the duct. Position the universal bracket so that its mounting screws do not touch the damper blade.

<Precautions for mounting the universal bracket> Follow the below instructions for bending the universal bracket at the specified positions to mount.

a. Position the actuator on the damper shaft as near the damper blade as possible in order to bend the universal bracket as little as possible.

b. Bend the universal bracket at the specified positions (once for each position). Note that the bending angle must be 45° or less. See the figure below.

Figure 10. Bending the universal bracket 4) Fix the actuator with the universal bracket on the duct.

Insert the pin of the universal bracket into the notch of the actuator to fix the actuator on the duct. Note: * The universal bracket prevents the actuator from rolling. * The actuator will slightly pitch when actuating the damper

shaft.

Figure 11. Fixing the actuator with the universal bracket

Jump to the Installation steps: Common to any length of the damper shaft section.

Installation steps: Mounting on 15–85 mm long damper shaft Installation steps differ depending on the damper shaft rotating direction. See 3) of Prior to installation section, and go to the corresponding installation steps.

Figure 12. Installation image for 15–85 mm long damper shaft Mounting on the damper shaft rotating counterclockwise ("L" direction) to close

1) Pull out the C-clip and remove the clamp from the "L" face of the actuator.

2) Attach the clamp to the damper shaft as near the damper blade as possible. (Make sure that the clamp does not touch the damper.)

3) Temporarily fix the clamp on the damper shaft. Set the clamp mounting orientation so that the mounting hole line of the actuator to be mounted at the steps 7) and 8) is parallel to the damper shaft, and tighten the hexagonal nuts of the clamp.

4) Pull out the C-clip and remove the position indicator from the "R" face of the actuator.

5) Meet the mark of the position indicator with the mark on the shaft mounting hole, and attach the position indicator to the "L" face of the actuator.

6) Fix the position indicator with the C-clip pulled out at the step 4).

7) Mount the actuator on the damper shaft so that the "L" face of the actuator faces the front.

Insert the pin..

Universalbracket

15–85 mm

Damper blade

Actuator

ClampPosition indicator

Damper blade

Damper shaft

45°

a. Position the actuator onthe damper shaft near thedamper blade.

b. Bend the universal bracketat these positions.

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AB-7143

12

Wiring

WARNING


CAUTION


All wiring must comply with applicable codes and ordinances.

Provide a circuit breaker for the power to the product.

Provide a circuit protector (e.g., a fuse, cut-off device) for the control panel to ensure your safety.

Wiring diagrams

Wiring numbers are indicated on the lead wire insulating jackets.

Note: *1 S1-S2 contact is ON at 10 % or smaller position. *2 Position for S4-S5 contact is adjustable within 10 % to 90 %

range. S4-S5 contact is ON at the set position or smaller than the set position.

Figure 22. Wiring diagram

Setting (Angle of Rotation)

WARNING


Do not disassemble the spring unit of the product. The spring unit might rapidly rotate or jump out of the actuator, resulting in serious injury.

CAUTION

If more than the rated power voltage is applied to the product, replace the product with new one for your safety. Failure to do so might cause fire.



IMPORTANT: After changing the mechanical stopper position,

make sure that the damper shaft is stopped at the changed mechanical stopper position.

Check that the set screws of the mechanical stopper are not loose.

Setting the maximum position

To set the maximum angle to 95° or smaller, change the mechanical stopper position within 33–100 % range. Mechanical stopper changed to the desired position must be fixed with the M4 screw.

Figure 23. Setting the angle of rotation

1 2

M

N L24 V AC

10 % 10–90 % adjustable

*1 *2

Maximum position:Adjustable from 33 % to 100 %

Mechanical stopper

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13

Manual Override

WARNING


CAUTION



To lock the damper at the desired position, use the crank handle (accessory).

1) Insert the crank handle into the hexagonal hole provided on the "L" or "R" face of the actuator, and rotate the crank handle to the direction the arrow (printed above the hexagonal hole) indicates.

Figure 24. Manually opening the damper

2) When the damper blade reaches the desired position, lock the actuator with the lock switch and remove the crank handle.

IMPORTANT: After using the crank handle, attach the crank

handle as "A" in the below figure shows. Completely attach the crank handle to the hexagonal hole so that it does not come off.

Figure 25. Locking the damper position

Auxiliary Switch Setting The actuator is equipped with two SPDT switches (fixed at 10 % position and adjustable from 10 to 90 % position). To set the adjustable switch, attach the crank handle to the auxiliary switch setting dial and rotate the dial to the setting position. After setting the dial, make sure that the auxiliary switch operates at the set position.

Figure 26. Setting the auxiliary switch

Crank handle

Rotating direction of crank handle

Crank handle

Auxiliary switch setting dial

Lock switch

Lock.

A Crank handle

Attach.

Rotate.

AB-7143

14

Blank page added for editing purpose.

AB-7143

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Blank page added for editing purpose.

AB-7143

Specifications are subject to change without notice.

Building Systems Company http://www.azbil.com/ Rev. 0.0 Jun. 2014 AB-7143(J: AI-7143 Rev. 1.0)

16

Documents

Direct Coupled Damper Actuator (Spring-return Type) Specifications