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Tools Required:

Wrenches:

(1) 

3

8

 in., (1)

 7

16

 in., and (1) 10mm

Mounting shown for damper in 
vertical position.

Note: Torque actuator shaft clamp 
screw to 88 in./lbs. (9.9Nm).

No.

Part Number

Qty

Description

1

MS actuator

2

415455

4

1

4

 - 20 spinlock nut

3

415586

4

#14 x 

3

4

 TEK SMS

4

415934

1

#10-24 nylock nut

5

416048

1

1

4

 x 

3

8

 shoulder bolt

6

815027

1

standoff bracket

7

723089

1

mounting bracket

8

415609

4

thread stud

Safety Warning

Equipment damage or electrical power hazard. Line 
voltage can cause death or serious injury and short 
equipment circuitry. Disconnect power supply before 
installation.

These instructions apply to the external field installation of Honeywell actuators on Greenheck model VCD control 
dampers when they are duct mounted or sleeved. 

®

Honeywell MS4120 MS4620 MS8120

1

®

Document 464287

Honeywell Actuators Direct Drive

MS4120, MS4620, MS8110, MS8120, 

MS7510, and MS7520

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, 
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure 
to comply with these instructions will result in voiding of the product warranty and may result in personal injury 
and/or property damage.

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