Honeywell ML6194, ML6294 User Manual

Direct Coupled Actuators

APPLICATION

The ML6194 and ML6294 Non-Spring Return Direct Coupled Actuators (DCA) provide floating single-pole, double-throw (spdt) control of dampers or valves in heating, ventilating, and air conditioning (HVAC) applications. The ML6294 has an internal, electrically isolated feedback potentiometer that can be used to provide indication of motor output hub position or slave a Series 90 actuator.

ML6194, ML6294

Non-Spring Return

PRODUCT DATA

FEATURES

• Mount directly on 1/2 in. to 3/4 in. (13 to 19 mm) round or square shaft. Mount on 1 in. (26 mm) round shafts with appropriate insert. All models shipped with 1 in. insert.

• 300 lb-in. (34 N•m) torque.

• Magnetic coupling eliminates need for mechanical stops or limit switch adjustments by limiting stall torque, which is dependent on temperature. Nominal stall torque at room temperature of 68°F (20°C) is 410 lb-in.

• 95° stroke provides necessary compression of rubber/neoprene gaskets commonly used on 90° low leakage dampers.

• Declutch feature allows manual adjustment.

• 165 second synchronous timing can eliminate need for feedback position indication in closed-loop temperature control applications.

• Both single-point and three-point mounting compatibility to allow installation flexibility.

• Models available with or without time-out feature.

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Ordering Information ........................................................ 2

Installation ........................................................................ 4

Wiring ............................................................................... 6

Operation .......................................................................... 7

Checkout .......................................................................... 8

Troubleshooting ................................................................ 8

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ML6194, ML6294 NON-SPRING RETURN DIRECT COUPLED ACTUATORS

SPECIFICATIONS

Models:

ML6194/ML6294 Non-Spring Return DCA: ML6194A/ML6294A: High Torque (300 lb-in.) DCA without

auxiliary switches or time-out feature.

ML6194C/ML6294C: High Torque (300 lb-in.) DCA with two

low voltage rated auxiliary switches and without time-out feature.

ML6194D/ML6294D: High Torque (300 lb-in.) DCA without

auxiliary switches and with time-out feature.

ML6194F/ML6294F: High Torque (300 lb-in.) DCA with two

low voltage rated auxiliary switches and with time-out feature.

Electrical Ratings:

Power Input: 24 Vac, ± 20%, 50 or 60 Hz. Power Consumption:

ML6194A,C/ML6294A,C: 5 VA at 24 Vac. ML6194D,F/ML6294D,F: 6 VA at 24 Vac.

Auxiliary Switch Ratings: 24 Vac, 3 AFL, 18 ALR, 1A Pilot

Duty.

Feedback Resistor (ML6294 only): 500 ohm linear

potentiometer.

Cable Ratings:

Control: Standard models include nonplenum UL/CSA rated,

30V, 140¡F (60¡C), 20 gauge cable.

Auxiliary Switch: UL/CSA rated 300V, 194°F (90°C), 18 gauge

cable.

Conduit Fittings: Plastic housing has two tapped holes for

1/2 in. (13 mm) conduit fittings.

Controller Type:

Floating, spdt.

500

480

460

440

420

400

380

360

340

TORQUE-LB. IN

320

300

280

260

240

220

-50 -25

Voltage Requirements at Cold Temperatures: At -40°F to

-20°F (-40°C to -29°C), minimum voltage is 24 Vac, +20%,

-0%.

Actuator Stroke: 95° nominal ±3°, mechanically limited.

Actuator Timing at 90° Stroke:

165 ±3 seconds synchronous at 60 Hz from -4°F to +140°F

(-20°C to +60°C).

200 ±3 seconds synchronous at 50 Hz from -4°F to +140°F

(-20°C to +60°C).

Non-synchronous below -4°F (-20°C).

MAXIMUM TORQUE

MINIMUM TORQUE

TEMPERATURE F

75 100

Fig. 1. Minimum and maximum torque

versus temperature.

125

150

M11266A

Torque Ratings at Rated Voltages:

Lift, hold, and breakaway ratings are temperature dependent;

Ambient Temperature Range: -40°F to +140°F (-40°C to

+60°C).

from 250 lb in. to 350 lb-in. (28 N•m to 40 N•m). See Fig. 1.

Stall Maximum: Temperature dependent; 365 lb-in. to 495 lb

in. (41 N•m to 56 N•m). See Fig. 1.

Torque Derating at 24 ±20% Vac: See Fig. 1.

Storage Temperature Range: -30°F to +150°F (-35°C to

+65°C).

Humidity: 5 to 95 percent relative humidity, noncondensing.

Mounting:

Mounts directly on 1/2 in. to 3/4 in. (13 mm to 19 mm) round or

square and 1 in. (26 mm) round shaft, using appropriate hub insert.

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.

63-2511—1 2

ML6194, ML6294 NON-SPRING RETURN DIRECT COUPLED ACTUATORS

Minimum shaft length required is 2.5 in. (64 mm). Mounting bracket included with all models. All actuators shipped with 1 in. (26 mm) hub insert. See

Accessories section for additional hub sizes.

4 (102)

3-3/32 (79)

1-17/32 (39)

9/32 (7) 3 PLACES

7/16 (11)

1-1/4 (32)

7-11/16 (196)

8-7/16 (215)

Dimensions: See Fig. 2.

3-5/32 (80)

1-29/32 (48)

2 (51)

15/16 (24)

1 REMOVABLE RETAINING RING FOR HUB SLEEVE REMOVAL.

1/2 (12)

1/4 (6)

36 (914)

4-1/2 (114)

6 (152)

13/32 (10)

1/4 (6)

1/8 (3)

1/2 (13)

2-1/2 (63)

3-5/16 (84)

5 (127)

5/8 (17)

1/2 (13)

1/2 (13)1-11/16 (43)

3/4 (19)

7/8 (22)

M11270A

1 (25)

Fig. 2. Approximate dimensions of ML6194/ML6294 Non-Spring Return DCA and mounting bracket in in. (mm).

3 63-2511—1

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