Honeywell ML6284 User Manual
Direct Coupled Damper Actuator
APPLICATION
The ML6284 Non-Spring Return Direct Coupled Damper
Actuator provides single pole double throw (spdt) floating
control of dampers in heating, ventilation, and air conditioning
(HVAC) applications. The actuator has an internal,
electrically isolated feedback potentiometer that can be used
to provide indication of the motor output hub position or
control a slave Series 90 actuator.
ML6284
Non-Spring Return
PRODUCT DATA
FEATURES
• Mounts directly on 3/8 in. to 5/8 in. (10 to 17 mm) round
and square and 3/4 in. (19 mm) round damper shafts by
using the appropriate insert. Most models are shipped
with 1/2 in. insert.
• Provides 150 lb-in. (17 N•m) running torque.
• Magnetic coupling eliminates the need for mechanical
stops or limit switch adjustments by limiting stall
torque to 250 lb-in. (28.3 N•m) maximum.
• 95° stroke provides necessary compression of
rubber/neoprene gaskets commonly used on 90° low
leakage dampers.
• Manual clutch allows for manual adjustment.
• 92-second synchronous timing can eliminate need for
feedback position indication in closed-loop
temperature control applications.
• Removable splined output hub permits premounting of
hub on damper shaft, providing installation flexibility.
• Designed for both single-point and three-point
mounting, to allow installation flexibility.
• Available with or without a time-out feature. Models
without the time-out feature are designed to be used
with intelligent building management system and/or
controller.
• Standard models have two 8 mm by 12 mm long set
screws for securing the damper shaft. Actuator models
available for various shaft sizes that allow damper
shaft to operate centered inside the output hub.
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
POUR COMMANDER ...................................................... 2
French
Installation ........................................................................ 4
Operation .......................................................................... 6
Checkout .......................................................................... 8
63-2505
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR
SPECIFICATIONS
Models:
ML6284: Non-Spring Return Direct Coupled Damper Actua-
tors.
ML6284A: High Torque (150 lb-in.) Direct Coupled Damper
Actuator without auxiliary switches or time-out function.
ML6284C: High Torque (150 lb-in.) Direct Coupled Damper
Actuator with two low voltage rated auxiliary switches and
without time-out function.
ML6284D: High Torque (150 lb-in.) Direct Coupled Damper
Actuator without auxiliary switches and with time-out
function.
ML6284F: High Torque (150 lb-in.) Direct Coupled Damper
Actuator with two low voltage auxiliary switches and with
time-out function.
Electrical Ratings:
Power Input: 24 Vac ± 20%, 50/60 Hz.
Power Consumption:
ML6284A-C: 5 VA maximum at 24 Vac.
ML6284D,F: 6 VA maximum at 24 Vac.
Auxiliary Switch Ratings: 24 Vac, 3 AFL, 18 ALR, 1A Pilot
Duty.
Feedback Resistor: 500 ohm linear potentiometer.
Cable Ratings:
Control: Standard models include nonplenum UL/CSA rated,
30V, 60°C, 20 gauge cable.
Auxiliary Switch: UL/CSA rated 300V 90°C, 18 gauge.
Controller Type: Floating, spdt.
Torque Ratings at Rated Voltages:
Lift and Hold Minimum: 150 lb-in. (17 N•m).
Breakaway Minimum: 150 lb-in. (17 N•m).
Stall Minimum: 150 lb-in. (17 N•m).
Stall Maximum: 250 lb-in. (28.3 N•m).
Actuator Timing at 90° Stroke:
92 ± 2 seconds synchronous at 60 Hz from -4°F to 140°F
(-20°C to +60°C).
110 ± 2 seconds synchronous at 50 Hz from -4°F to 140°F
(-20°C to +60°C).
Non synchronous below -4°F (-16°C).
Ambient Temperature Range: -30°F to +140°F (-35°C to
+60°C).
Storage Temperature: -30°F to 150°F (-35°C to 65°C).
Humidity: 5 to 95 percent relative humidity, noncondensing.
Mounting:
Mounts directly on horizontal 3/8 in. to 5/8 in. (12 to 17 mm)
round or square or 3/4 in. (19 mm) round damper shaft.
Minimum shaft length required:
• 2.5 in. (64 mm) when the shaft attachment is made on the
side of the actuator opposite the duct;
• 0.65 in. (16 mm) when the hub is mounted on the shaft
before the actuator is installed.
Most actuators are shipped with specifically sized hubs. Some
models contain an assembly with assorted hub inserts.
Mounting bracket is included with most models.
Dimensions: See Fig. 1.
Device Weight: 3.0 lb (1.36 kg).
Noise Rating: Driving Only: 45 dBA maximum at 1.0m.
Position Indicator: Mounted on actuator hub.
Actuator Design Life: Full Stroke Cycles:100,000.
Repositions: 2,000,000 minimum.
Torque Deratings at 24 Vac ±20%:
150 lb-in. from -20°F to +95°F (-29°C to +35°C).
133 lb-in. from 95°F to 140°F (35°C to 60°C).
150 lb-in. from -40°F to -20°F (-40°C to -29°C) (at 24 Vac
+20% only).
Actuator Stroke: 95° Nominal ± 3°, mechanically limited.
Approvals:
UL94-5V Enclosure: Plenum rating.
UL873: Low voltage auxiliary switches.
UL Listed: File number E4436, Guide number XAPX.
CSA Listed: File number LR95329-17.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
63-2505 2
4 (102)
3-3/32 (79)
1-17/32
(39)
9/32 (7)
3 PLACES
ML6284 NON-SPRING RETURN DIRECT COUPLED DAMPER ACTUATOR
7/16 (11)
1-1/4
(32)
3-5/32
(80)
2
(51)
1-29/32
(48)
1/2
(12)
7-11/16
(196)
8-7/16
(215)
1/4 (6)
36
(914)
1
13/32 (10)
5/8 (17)
1/4 (6)
1/8 (3)
3/4
7/8 (22)
1/2
(19)
15/16
(24)
1 REMOVABLE RETAINING RING FOR
REMOVAL OF HUB SLEEVE
1/2 (13)
2-1/2 (63)
3-5/16 (84)
4-1/2 (114)
5 (127)
6 (152)
(13)
1/2 (13)1-11/16 (43)
M7618B
Fig. 1. Approximate dimensions of ML6284 Non-Spring Return Direct Coupled Damper Actuator
and mounting bracket in in. (mm).
3 63-2505
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