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Non-Spring Return Direct Coupled Actuator
ML6174; ML7174
SUBMITTAL SHEETS
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
FEATURES
• 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.
DIMENSIONS DIAGRAMS
1
(25)
M22990
OPTIONAL
AUXILIARY
SWITCH
T1
T2
-
+
+
24 Vac
2-10 Vdc
4-20 mA
4-7/8
(123)
4-1/4
(108)
5-9/16
(141)
11/16
(18)
1/8
(3)
5/16 (8)
1-11/16
(43)
3-3/8 (86)
1/8
(3)
15/32 (12)
1-5/16
(33)
3 (76)
2-7/8 (73)
1-11/16
(42)
1/8
(3)
1 (25)
M18016
CW
COM
CCW
OPTIONAL
AUXILIARY
SWITCH
11/16
(18)
3-3/8 (86)
4-1/4
(108)
4-7/8
(123)
2-7/8 (73)
1-11/16
(42)
1/8
(3)
1-5/16
(33)
7/8
(22)
2-1/2 (64)
M18018
5-7/8
(149)
1-13/16
(46)
1
(25)
3-5/8 (92)
1-13/16 (46)
3 IN. (76 MM)
MINIMUM SPACING
REQUIRED
FOR REMOVING
CONDUIT COVER
3-3/4 (95)
7/8
(22)