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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.
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.
G.R. • Rev. 4-95 • ©Honeywell Inc. 1995
Direct Coupled Actuator
1
ML6185
Spring Return
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
63-2483-2
63-2483-2
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Summary of Contents for Honeywell ML6185
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Page 1: Table Of Contents
(cw) or counterclockwise (ccw) Specifications ..........2 spring rotation. Ordering Information ........2 Designed for both single-point and three-point mount- Installation ............. 4 ing, providing installation flexibility. Operation ............9 Checkout ............11 G.R. • Rev. 4-95 • ©Honeywell Inc. 1995 63-2483—2 63-2483-2... -
Page 2: Specifications
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,... - Page 3 ML6185 SPECIFICATIONS Fig. 1—Approximate dimensions of ML6185 Spring Return Direct Coupled Actuator and mounting bracket in in. (mm). 1-5/32 (29) 6-25/32 (173) 1-17/32 (39) 3-1/16 (79) 8-9/32 (210) 3-29/32 (99) 23/32 3-15/16 (100) (18) 1-21/32 (42) 3-1/2 (89) 1-5/8 1-9/32...
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Page 4: Installation
The ML6185 can be mounted to pro- LOCATION vide clockwise or counterclockwise spring return. Reverse Install the actuator in any location free from acid fumes or... - Page 5 Proper sleeve selection is necessary when three- point mounting is used to avoid excessive strain on the output gear. Most ML6185 Actuators are shipped with a 1/2 in. hub sleeve. For field use, several hub sleeve sizes are available.
- Page 6 Other possible mounting configurations and standard connections are shown in Fig. 4 through 7. Fig. 4—ML6185 Actuator mounted for counterclockwise spring rotation with the output hub inside the actuator. (NOTE: NEMA rating applies only with damper shaft in the horizontal position.)
- Page 7 ML6185 INSTALLATION Fig. 5—Standard direct coupled mounting of ML6185 to a damper with counterclockwise spring rotation. M7229 63-2483—2...
- Page 8 See Fig. 8 for a typical wiring connection. The ML6185 has an aluminum die cast housing with two integral cast bosses on the end of the device, tapped for 1/2 in. conduit fittings. Some models are shipped with a water seal in the conduit opening.
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Page 9: Operation
Connecting ML6185 Actuators in Parallel leadwires (red, black, yellow and blue) in parallel. The ML6185 Actuators can be stacked on one damper shaft number of actuators that may be wired in parallel is depen- to increase the output torque required to drive dampers dent on the transformer VA rating. - Page 10 ML6185 OPERATION Fig. 12—ML6185 indicator start positions. FULLY COUNTERCLOCKWISE SPRING RETURN INDICATOR START POSITIONS POINTER AT 90° POINTER AT 0° DETENT IN INSERT DETENT IN INSERT DRIVE CLOCKWISE TO CLOSE DRIVE CLOCKWISE TO OPEN (REVERSE ACTING) (DIRECT ACTING) FULLY CLOCKWISE SPRING RETURN INDICATOR START POSITIONS POINTER AT 90°...
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Page 11: Checkout
ML6185 CHECKOUT Checkout The ML6185 Direct Coupled Actuator can be checked 4. Connect 24 Vac to the appropriate leadwires (red to out either directly or by using a controller. blue or red to yellow) to move the damper to the opposite position. - Page 12 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 QUALITY IS KEY 63-2483—2 Printed in U.S.A.