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ML6144
Direct Coupled Actuator
INSTALLATION INSTRUCTIONS
DESCRIPTION
CONDUIT CONNECTION
The ML6144 Direct Coupled Actuator (DCA) is a
360 degree rotary actuator without end-stops. It mounts
directly to a threaded shaft that drives a damper blade
back and forth along the entire length of a Modular
Integrated Terminal (MIT) air delivery box that is installed
under the floor.
3-1/16
(77)
2-1/16
(53)
7/8 (22)
3-9/16 (91)
3-11/16 (93)
SPECIFICATIONS
FIXED-PLUG CONNECTION
3/8
(9)
1-13/16 (45)
Models:
ML6144A1007: Enclosure includes conduit connections.
ML6144A1015: Standard enclosure (fixed-plug
connections).
5-1/8
(130)
Dimensions: See Fig. 1.
3-1/4
(83)
Stroke: 360° cw or ccw.
Electrical Ratings:
Supply Voltage: 24 Vac ±20%, 50/60 Hz, Class 2 wiring.
Connection: Four-pin Molex® connector.
Nominal Power Consumption (at 24 Vac): 4.8 VA.
Temperature Ratings:
Operating: 40°F to 115°F (6°C to 46°C).
Shipping: -40°F to 150°F (-40°C to 65°C).
Humidity Rating: 5 to 95 percent RH (non-condensing).
Noise: 35 dBA (maximum) at 1m.
Torque Ratings (Breakaway and Stall):
Minimum: 3.0 lb-in.
Maximum: 6.0 lb-in.
Timing:
At 60 Hz
M17373
Fig. 1. ML6144 Dimensions in in. (mm).
Accessories:
32002031-002 Shaft Adapter (“clothespin” only).
32003303-001 Actuator to Actuator Cable, 25 ft.
32003303-002 Thermostat to Actuator Cable, 50 ft.
32003303-005 Actuator to Actuator Extension Cable, 25 ft.
32003303-006 Splitter Cable to parallel two strings of actuators, 12 in.
Approvals:
Underwriter Laboratories, Inc. Listed:
Meets UL873 plenum requirements.
Canadian Underwriter Laboratories, Inc. Listed.
NEMA1 rated.
Meets CE requirements.
Weight: 2.5 lb.
Load
1-3/4
(45)
At 50 Hz
None
10 rpm ±10%
8.3 rpm ±10%
3.0 lb-in.
9.5 rpm ±10%
7.9 rpm ±10%
Actuator Shaft Mounting: 3/8 in. Acme threaded shaft
coupled to actuator using included shaft adapter
(“clothespin”) and roll pin (not included).
Actuator Life Ratings (at 3.0 lb-in. Continuous Load):
Full Revolutions: 3,200,000.
Repositions: 1,500,000.
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
INSTALLATION
Mounting
The actuator mounts on a 3/8 in. threaded shaft that
drives a damper blade back and forth along the entire
length of an MIT box:
1. Align actuator guides with horizontal runners on
box, see Fig. 2.
NOTE: Ensure actuator is oriented as shown in
Fig. 2.
63-2545-2
ML6144 DIRECT COUPLED ACTUATOR
2.
3.
4.
Slide the actuator into the MIT box until it comes in
contact with the cross beam, see Fig. 2.
Slide the shaft adapter onto the threaded damper
shaft and secure using a roll pin (not supplied).
(See Fig. 3.)
Attach the adapter to the actuator by sliding it into
the square hole in the hub until the circular
shoulder is flush with the actuator hub and the
adapter snaps into place.
2
1
M21011
Fig. 3. Mounting the shaft adapter (“clothespin”).
2
SERIES 60
CONTROLLER
CCW
CW
L2
1
L1
(HOT)
1
2
3
4
1= GROUND
2= CW
3= CCW
4= COMMON
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
A MAXIMUM OF EIGHT ML6144 ACTUATORS CAN BE WIRED IN
A SINGLE DAISY CHAIN.
M16044A
Fig. 4. ML6144 wiring.
CHECKOUT AND
TROUBLESHOOTING
M17017
Fig. 2. Mounting the ML6144.
Wiring
The ML6144 wiring design facilitates trouble-free
installation. Circuitry of both ML6144 Molex connectors is
identical. So, either connector can serve as the input:
1. Connect the input (a Molex plug wired with
Series 60 spdt wiring) to one ML6144 connector,
see Fig. 4.
2. Use the second Molex connector, as needed, as
output to another ML6144 to daisy-chain up to
eight motors, see Fig. 4.
Home and Building Control Home and Building Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
63-2545—2
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
B.B. Rev. 10-01
To check out the ML6144:
1. Operate the device through one full cycle.
2. Drive the damper fully closed.
3. Drive the damper fully open.
4. If the actuator does not run:
a. Ensure the actuator is mounted properly.
b. Check power supply for the presence of 24 Vac.
c. Check for binding.
5. If the mounting is correct, 24 Vac input is present,
the drive shaft is clear from obstruction, but the
actuator does not run, replace it.
Molex® is a registered trademark of Molex Inc.
By using this Honeywell literature, you agree that Honeywell will have no
liability for any damages arising out of your use or modification to, the literature.
You will defend and indemnify Honeywell, its affiliates and subsidiaries, from
and against any liability, cost, or damages, including attorneys’ fees, arising out
of, or resulting from, any modification to the literature by you.
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