Honeywell MS4103 Manual Do Utilizador

89

Non-Spring Return Direct Coupled Actuator

ml6174; ml7174

S

ubmitt

al Sheet

S

ML6174; ML7174

Used to control dampers in 
applications such as variable air 
volume (VAV) terminal units and for 
mounting on ball valves; suitable 
for use with SPDT or floating 
thermostats or building automation 
controls.

SPECIFICATIONS
Actuator Type  ....................................... Damper

Rotational Stroke  .................................. 90 degrees

Fail Safe Mode  ..................................... Non-Spring Return

Rated Torque ........................................ 70 lb-in. (8 Nm) 

External Auxiliary Switches Available  .. Yes, 201052B

Electrical Connections  ......................... Screw terminals

Environmental Rating  ........................... NEMA1

Feedback  ............................................. With accessory

Frequency  ............................................ 50 Hz, 60 Hz

Manual operation  ................................. Declutch mechanism

Mounting  .............................................. Direct Coupled

Maximum Noise Rating, 

Driving (dBA @ 1m) .............................. 45

Timing, Nominal Driving at 60 Hz ......... 90 sec., 180 sec. or 420 sec.

Power Consumption, Driving ................ 2.4 VA or 5.4 VA

Rotation to Open  .................................. By wiring

Rotational Stroke Adjustment  ............... Mechanically limited at 45 or 

60 degrees in cw or ccw 

directions

Compatible Damper Shafts .................. 3/8 to 1/2 in. square or round

(10 to 13 square/round) 

Shaft Adapter Type  .............................. Aluminum Hub, two set screws

Supply Voltage  ..................................... 24 Vac ±20%

Materials ............................................... Steel plate and Plenum rated 

plastic

Operating Humidity Range (% RH) ...... 5 to 95% RH, non-condensing

Ambient Temperature Range  ............... 20 F to 125 F (-18 C to 50 C) 

Storage Temperature Range  ................ 20 F to 130 F (-18 C to 54 C) 

Weight  .................................................. 1.5 lb (0.68 kg) 

Includes ................................................ 4074ENY Bag Assembly

APPROVALS
Underwriters Laboratories, Inc. ............ UL873, Plenum Rated

Canadian Underwriters 

Laboratories, Inc.  ................................. cUL C22.2 No. 24-93

• Control for air damper applications with up to 20 sq.ft. 

assuming 3.5 lb-in. per sq.ft. of damper area, velocity 
independent. 

• Magnetic coupling eliminates the need for mechanical 

stops or limit switch adjustments by limiting stall torque to 
130 lb-in. maximum. 

• Mount directly on 3/8 to 1/2 in. round and square damper 

shafts. All models include manual declutch lever for ease of 
mounting, and bag assembly with two minimum position 
setscrews. 90 second timing models are suitable for use 
with pressure independent VAV systems. 

• Selectable 45, 60, and 90 degree stroke in either clockwise 

or counterclockwise direction.

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M22990

T1

T2

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+

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24 Vac

2-10 Vdc

4-20 mA

4-7/8

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4-1/4

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5-9/16

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11/16

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1/8

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1/8

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15/32 (12)

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3 (76)

2-7/8 (73)

1-11/16

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1/8

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1 (25)

M18016

CW

COM

CCW

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3-3/8 (86)

4-1/4

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4-7/8

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2-7/8  (73)

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1/8

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M18018

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3 IN. (76 MM)

MINIMUM SPACING

REQUIRED 

FOR REMOVING 

CONDUIT COVER

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