Honeywell ML6185 User Manual
Direct Coupled Actuator
The ML6185 Spring Return Direct Coupled
Rotary Actuator is a floating control motor that can
be used with controls that provide switched or
floating single pole double throw (spdt) control
output to operate dampers in heating, ventilation,
and air conditioning (HVAC) applications.
ML6185
Spring Return
■ Mounts directly on horizontal 3/8 in., 1/2 in., and
5/8 in. round and square damper shafts by using the
appropriate insert. Most models are shipped with 1/
2 in. insert.
■ Provides 50 lb-in. running and spring return torque.
■ Magnetic coupling eliminates the need for mechani-
cal stops or limit switch adjustments by limiting
stall torque to 130 lb-in. maximum.
■ 95° stroke provides necessary compression of rub-
ber/neoprene gaskets commonly used on 90° low
leakage dampers.
■ 88 second synchronous timing can eliminate need
for feedback position indication in closed-loop tem-
perature control applications.
■ Removable splined output hub permits premounting
of the hub on the damper shaft, providing installation
flexibility.
■ Reversible mounting allows actuator to be used for
either clockwise (cw) or counterclockwise (ccw)
spring rotation.
■ Designed for both single-point and three-point mount-
ing, providing 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 x 12 mm long set
screws for securing the damper shaft. Actuator
models are available for various shaft sizes that will
allow the damper shaft to operate centered inside the
output hub.
■ Standard one-meter cable with color-coded lead-
wires allows external wire connections with 1/2 in.
conduit connectors.
■ Can mount two or more actuators on one damper
shaft to increase output torque for use on dampers
larger than 16 square feet.
CONTENTS
Specifications .................................................2
Ordering Information..................................... 2
Installation .....................................................4
Operation .......................................................9
Checkout.......................................................11
1 63-2483—2G.R. • Rev. 4-95 • ©Honeywell Inc. 1995
63-2483-2
ML6185
SPECIFICATIONS • ORDERING INFORMATION
Specifications
MODELS: ML6185 Spring Return Direct Coupled Rotary
Actuators.
ML6185A: Medium Torque (50 lb-in.) Direct Coupled
Rotary Actuator without auxiliary switches and
without time-out function.
ML6185C: Medium Torque (50 lb-in.) Direct Coupled
Rotary Actuator with two line voltage rated auxiliary switches, without time-out function.
ML6185D: Medium Torque (50 lb-in.) Direct Coupled
Rotary Actuator without auxiliary switches and
with time-out function.
ML6185F: Medium Torque (50 lb-in.) Direct Coupled
Rotary Actuator with two line voltage auxiliary
switches and time-out function.
ELECTRICAL RATINGS:
Power Input: 24 Vac ± 20%, 50/60 Hz.
Power Consumption:
ML6185A-C: 12 VA maximum at 24 Vac.
ML6185D,F: 12 VA maximum at 24 Vac.
Auxiliary Switch Ratings: 120, 240 Vac: 3 AFL, 18 ALR,
1A pilot duty.
Control: Standard models include nonplenum UL/
CSA rated, 30V, 60°C, 20 gauge cable.
Auxiliary Switch: UL/CSA rated 300V 90°C, 18
gauge.
TORQUE RATINGS (at Rated Voltages):
Lift and Hold: 50 lb-in. (6 N•m).
Breakaway Minimum: 50 lb-in. (6 N•m).
Stall Minimum: 50 lb-in. (6 N•m) spring return.
Stall Driving Maximum: 130 lb-in. (15 N•m).
ACTUATOR STROKE: 95° Nominal ± 2°, mechanically
limited.
ACTUATOR TIMING at 90° Stroke:
88 +/- 2 seconds synchronous at 60 Hz from 0°F to
140°F;
106 +/- 2 seconds at 50 Hz;
100 seconds at -30°F.
Spring Wind Timing (Upon Power Restoration Only):
100 seconds nominal at 60 Hz, 120 seconds at 50 Hz.
Spring Return Timing:
10 seconds minimum per 90° at 72°F no load;
30 seconds maximum per 90° at 72°F at rated load;
5 minutes maximum at -30°F at rated load.
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 16 mm) round or square damper shaft.
Minimum shaft length required: 3.5 in. (76 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.
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, or specify:
1. Model number.
2. Application.
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 Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Logistics
Honeywell Inc., 1885 Douglas Drive North,
Minneapolis, Minnesota 55422-4386 (612) 951-1000
In Canada—Honeywell Limited/Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9. International Sales and Service
offices in all principal cities of the world.
63-2483—2 2
®
Fig. 1—Approximate dimensions of ML6185 Spring Return Direct Coupled Actuator and mounting
bracket in in. (mm).
1-5/32 (29)
1-17/32 (39)
3-1/16
(79)
3-29/32
(99)
6-25/32 (173)
8-9/32 (210)
23/32
(18)
3-15/16 (100)
ML6185
SPECIFICATIONS
3-29/32
(99)
3/4 (19)
1-21/32
(42)
1-5/8
(41)
3/8
(10)
13/64 (5)
1-13/32 (36)
4-13/32 (112)
135o
o
± 15
1-5/8 (41)
10-13/32 (264)
CLEARANCE
REQUIRED
FOR SPLINED
HUB MOUNTING
3-1/2
(89)
1-9/32
(32)
1-13/32
(36)
1/2 (13)
1-3/32
(28)
13/32
5/16
(8)
(10)
MOUNTING BRACKET
3 63-2483—2
M8257
ML6185
SPECIFICATIONS • INSTALLATION
DEVICE WEIGHT: 4.0 lb (1.82 kg).
NOISE RATING : (Driving only) 45 dBA maximum at
0.9m.
SPRING ROTATION: Clockwise (cw); counterclockwise
(ccw) by reverse mounting.
POSITION INDICATOR: Mounted on actuator hub.
ACTUATOR DESIGN LIFE:
Full Stroke Cycles: 60,000.
Repositions: 1,500,000.
Spring Return Cycles: 7,500.
APPROVALS:
UL94-5V: (Enclosure) Plenum rating.
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 and description given in this specification 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.
CA UTION
1. Disconnect power before installation to prevent
electrical shock or equipment damage.
2. Never turn motor output hub by hand or with a
wrench.
3. Do not install actuator in areas with acid fumes
or other deteriorating vapors that might attack
the metal parts of the actuator.
4. 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.
LOCATION
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.
MOUNTING
The ML6185 Direct Coupled 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 ML6185 Direct Coupled Actuator is designed for
single-point mounting when using an adapter bracket. Singlepoint mounting is typically used when the actuator is mounted
on the damper frame.
UL873: (Line voltage auxiliary switches).
CSA: FILE NUMBER E4436, Guide Number XAPX.
ENVIRONMENTAL PROTECTION RATINGS: NEMA1
standard with damper shaft in horizontal position.
MOUNTING TAB: For use with Universal mounting bracket.
ACCESSORIES:
205820A 3-Point Mounting Kit.
205830A Crank-Arm Accessory.
205753 Hub Sleeve, 3/8 in.
205758 Hub Sleeve, 5/8 in.
Installation
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 support the actuator at the correct
height.
The ML6185 Direct Coupled Actuator can also be threepoint mounted using the two front gear housing slots and
the adapter bracket. Secure two screws through the two
front gear housing slots and position the adapter bracket to
secure the rear of the actuator. Three point mounting is used
for foot mounting the actuator or internally mounting the
actuator in the duct, when direct shaft coupling is not
possible.
CAUTION
Do not use the actuator as a shaft bearing. The
actuator must be used only to supply rotational
torque. To prevent damage to the actuator, avoid
any side loads to the actuator output coupling
bearings.
PREPARATION
Before installing the ML6185 on the damper shaft,
determine the opening direction of the damper shaft to
determine the correct spring return rotation and correctly
connect the wiring. The ML6185 can be mounted to provide clockwise or counterclockwise spring return. Reverse
the actuator, if necessary, to provide the desired spring
action.
INSTALLATION
Installing the Actuator and Mounting Bracket (Single
Point Mounting)
When the direction of the damper shaft rotation is determined (either cw or ccw ), proceed as follows:
1. Place the ML6185 Direct Coupled Actuator over the
damper shaft.
2. Position the actuator for best access to the actuator
damper shaft locking screw.
3. Install the mounting bracket (see Fig. 2) and adjust it
to support the actuator at the correct height. Mark the screw
holes for installing the mounting bracket on the damper
housing.
63-2483—2 4
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