Honeywell MS4620F User manual

INSTALLATION INSTRUCTIONS
62-0182
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
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
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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.
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1
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3M20427
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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.