Honeywell ml6284 User Manual

63-2505

4

Environmental Protection Ratings: NEMA1 standard with 

damper shaft in horizontal position.

205617 Hub Insert, 3/4 in. round.

205753 Hub Insert, 3/8 in.

205758 Hub Insert, 5/8 in.

205820A 3-Point Mounting Kit.

205685 Crank-Arm Accessory.

205850B End Stop Kit.

1. Read instructions carefully. Failure to follow them could 

damage the product or cause a hazardous condition.

2. Check ratings and description given in the specifications 

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.

Disconnect power before installation to prevent 

electrical shock or equipment damage.

1. Never turn motor output hub by hand or wrench.

2. Do not install actuator in areas with acid fumes or 

other deteriorating vapors that might attack the 

metal parts of the actuator. 

Do not install actuator in areas with escaping gas or 

other explosive vapors that could be ignited by a spark 

from the actuator or attached accessories.

Install the actuator in any location free from acid fumes or 

other deteriorating vapors that might attack the metal parts of 

the actuator. Make sure the location is not subject to escaping 

gas or other explosive vapors that could accidentally be 

ignited by a spark from the actuator or its attached parts.

Install the actuator in a location that allows enough clearance 

for mounting accessories and for servicing.

The ML6284 Non-Spring Return Direct Coupled Damper 

Actuator is designed to operate a damper by driving the 

damper shaft either cw 

 or ccw

 depending on 

damper design. All actuators are shipped in the fully closed 

position.

The ML6284 Non-Spring Return Direct Coupled Damper 

Actuator is designed with removable hub inserts to 

accommodate specific damper shaft sizes. Proper sleeve 

selection is necessary when three-point mounting is used to 

avoid excessive strain on the output gear. Most ML6284 

Actuators are shipped with a 1/2 in. hub insert. For field use, 

two hub insert sizes are available. See the Accessories listing 

in the Specifications section. Shaft sizes are stamped on the 

inserts.

The ML6284 Non-Spring Return Direct Coupled Damper 

Actuator is designed for single-point mounting when using a 

mounting bracket. Single-point mounting is typically used 

when the actuator is mounted on the damper shaft.

The ML6284 Non-Spring Return Direct Coupled Damper 

Actuator can be mounted directly on the damper shaft with the 

actuator in any position.

A mounting bracket (see Fig. 1) is provided with some models 

to aid in installing the actuator. The bracket can be bent to any 

shape to allow the bracket tab to be centered in the actuator 

slot.

The mounting bracket must not bind or clamp the 

actuator to the duct. The mounting bracket only 

prevents the actuator housing from rotating.

The ML6284 Direct Coupled Damper Actuator has a 

reversible output hub. The hub is factory mounted on the top 

of the actuator gear housing. When attaching to damper 

shafts less than 2.5 in. (64 mm) long, or for ease of mounting, 

the output hub may be mounted to the back of the actuator 

gear housing. See Fig. 3. Be careful when removing the 

retaining ring which secures the output hub sleeve to the 

actuator housing. Use a flat headed screwdriver to pry the 

retaining ring loose.