Honeywell ML6174, ML7174 Catalog Page

Direct Coupled Damper Actuators—Non-Spring Return

ML6161A,B ML6161C,D ML7161

ML6174; ML7174, Non-Spring Return Direct Coupled Damper Actuators, 70 lb-in

Used to control dampers in HVAC applications and for mounting on ball valves; suitable for use with modulating (2-10 Vdc) thermostats or building automation controls.

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

3.5 in-lb 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

Actuator Type: Damper Rotational Stroke: 90 degrees Fail Safe Mode: Non-Spring Return Torque Rating: 70 lb-in. (8 Nm) External Auxiliary Switches Available: Yes, 201052B Number of Internal Auxiliary Switch: 0 Electrical Connections: Screw terminals Environmental Rating: NEMA1 Frequency: 50 Hz; 60 Hz Manual operation: Declutch mechanism Mounting: Direct Coupled Maximum Noise Rating, Driving (dBA @ 1m): 45 Rotation to Open: By wiring Rotational Stroke Adjustment: Mechanically limited at 45 or 60

degrees in cw or ccw directions

Product Number

* ML6174A2002/U On/Off; SPDT;

* ML6174A2010/U On/Off; SPDT;

* ML6174B2019/U On/Off; SPDT;

ML6174B2035 On/Off; SPDT;

ML6174D2009/U On/Off; SPDT;

ML7174A2001/U 4-20 mA;

* TRADELINE models • SUPER TRADELINE models

Control Signal Feedback

Floating

2-10 Vdc

With accessory

— 90 sec 2.4 VA — —

— 420 sec 2.4 VA — —

— 90 sec 2.4 VA — Includes two 5/8 x 7/8 in. double

— 90 sec 5.4 VA 45K ohm (2-10 Vdc signal),

Timing (seconds) Nominal Driving @ 60 Hz

90 sec 2.4 VA — —

180 sec 2.4 VA — —

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

(10 to 13 mm 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

Power Consumption, Driving Input Impedance Comments

knock-out conduit openings

536 ohm (4-20 mA signal)

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