Honeywell MS4620F User manual

INSTALLATION INSTRUCTIONS

62-0182

® U.S. Registered Trademark

MS4120F, MS4620F, MS8120F

Fast-Acting, Two-Position Actuator

TANDEM MOUNTING

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazardous

condition.

2. Check the ratings given in the instructions and on the

product to make sure the product is suitable for your

application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

NOTES:

— Individual actuator specifications do not change

when tandem mounted. For specification details

see form 63-2584.

— A tandem mounted pair of actuators provides a

driving/spring return torque of 350 lb-in. and a

maximum stall torque of 850 lb-in. (96 N•m).

Required Accessories (not supplied with actuator):

205649 Mounting Bracket.

1/4 in.-20 bolt, 1 in. long, SAE grade 5 minimum.

1/4 in.-20 nut, SAE grade 5 minimum.

Location

MS4120F, MS4620F, and MS8120F DCA are designed to

operate a damper by driving the shaft in either clockwise

or counterclockwise direction. Each actuator housing

has two slots on the bottom, either of which, with a 205649

Mounting Bracket, secures it flush to a damper box.

NOTE: When mounted correctly, these slots allow actuators

to float without rotating relative to the damper shaft.

Preparation

Before mounting actuators, determine the damper opening

direction for correct spring return rotation. The actuators can

be mounted to provide clockwise or counterclockwise spring

return.

Determine Appropriate Mounting Orientation

See actuator instructions (form 63-2584) for mounting

orientation details.

IMPORTANT

Be sure to mount both actuators to spring return in

the same direction.

Measure Shaft Length

IMPORTANT

Minimum required shaft length for tandem mounting

is 4 in. Honeywell recommends a shaft length of at

least 6-1/4 in.

If the shaft is less than 6-1/4 in. long, the shaft coupling must

be located between the damper and actuator housing. If the

shaft length is more than 6-1/4 in., the shaft coupling may be

located on either side of the actuator housing.

If the coupling must be moved from one side of the actuator to

the reverse, follow the instructions provided with the actuator

(form 63-2584).

Mounting

CAUTION

Equipment Damage Hazard.

Tightly securing an actuator can damage the

actuator and reduce the output torque.

Mount each actuator to allow it to float independently

along its vertical axis.

CAUTION

Device Malfunction Hazard.

Improper shaft coupling tightening causes device

malfunction.

Tighten shaft coupling with proper torque to prevent

damper shaft slippage.

CAUTION

Actuator Damage Hazard.

Using actuator as shaft bearing causes device

damage.

Use actuator only to supply rotational torque. Avoid

any side loads to actuator output coupling bearings.

62-0182 B.B. 3-02 www.honeywell.com

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

MS4120F, MS4620F, MS8120F FAST-ACTING, TWO-POSITION ACTUATOR

Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American

Honeywell Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget Region

1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway

Golden Valley, MN 55422 Scarborough, Ontario 17 Changi Business Park Central 1 Belgium Suite 200

M1V 4Z9 Singapore 486073 Sunrise FL 33325

To tandem mount actuators, proceed as follows:

1. Attach the bolt to the inner actuator’s outer slot with the

nut. See Fig. 1.

2. Place inner actuator over damper shaft; and hold

mounting bracket in place.

3. Mark screw holes on damper housing.

4. Remove actuator and mounting bracket.

5. Drill or center-punch holes for mounting screws (or use

no.10 self-tapping sheet metal screws).

6. Turn damper blades to desired normal (closed) position.

7. Place actuator and mounting bracket back into position.

8. Secure bracket to damper box with sheet metal screws.

9. Using 10 mm wrench, tighten shaft coupling securely

onto damper shaft using minimum 120 lb-in., maximum

180 lb-in. torque.

10. Place outer actuator over damper shaft using the bolt as

an anti-rotation tab.

NOTE: Maintain equal spacing between actuators

along the length of the housings. See Fig. 1.

11. Using 10 mm wrench, tighten shaft coupling securely

onto damper shaft using minimum 120 lb-in., maximum

180 lb-in. torque.

Fig. 1. Tandem mounting actuators to damper housing.

IMPORTANT

Attach the bolt only to the inner actuator. Ensure the

outer actuator is free to float, affixed only to the shaft.

ENSURE MOUNTING ASSEMBLIES (BRACKET AND BOLT) ALLOW ACTUATORS TO FLOAT INDEPENTLY ALONG

INDICATED AXIS. WHEN NOT ALLOWED TO FLOAT, THE RESULTING BINDING AND/OR COMPETITION CAN

DAMAGE THE ACTUATORS AND REDUCE TORQUE OUTPUT.

ACCESSORY BRACKET, BOLT, AND NUT ARE NOT SUPPLIED WITH THE ACTUATOR.

MAINTAIN EQUAL SPACING BETWEEN ACTUATORS ALONG THE LENGTH OF THE HOUSINGS.

3M20427

By using this Honeywell literature, you agree that Honeywell will have no liability

for any damages arising out of your use or modification to, the literature. You will

defend and indemnify Honeywell, its affiliates and subsidiaries, from and against

any liability, cost, or damages, including attorneys’ fees, arising out of, or

resulting from, any modification to the literature by you.

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