Honeywell ML4125 Catalog Page

Direct Coupled Damper Actuator—Spring Return

ML4125; ML8125 HVAC, Fast-Acting, Two-Position Actuators, 100 lb-in

The ML8125 Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) with an integral junction box for on/off damper control.

• Integral spring return

• -40 C to 130 F (-40 C to 54 C) operating temperature range

• No audible noise during holding

• Electronic circuitry provides efficient operation while eliminating the need for limit switches

• Ninety-five degree angle of rotation

• Die-cast aluminum housing. Housing design allows flush mounting to damper

• Integral junction box with three conduit openings eliminates need for separate wiring box

• Direct mounting to 3/8 or 1/2 in. round or square shaft

• Not intended for smoke control systems

Actuator Type: Damper Rotational Stroke: 95 ±3 degrees Fail Safe Mode: Spring Return Torque Rating: 100 lb-in. (11.3 Nm) Spring Return Torque: 100 lb-in. (11.3 Nm) External Auxiliary Switches Available: Yes, 32003532-005 Number of Internal Auxiliary Switch: 0 Electrical Connections: Two color-coded leads Electrical Connection Length: 16 in. (406 mm) Environmental Rating: NEMA1 Frequency: 60 Hz Mounting: Direct Coupled Maximum Noise Rating, Holding (dBA @ 1m): 20 (no aud ble noise) Maximum Noise Rating, Driving (dBA @ 1m): 65

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 Materials: Aluminum housing Operating Humidity Range (% RH): 5 to 95% RH, non-condensing Ambient Temperature Range: -40 F to +130 F (-40 C to +55 C) Storage Temperature Range: -40 F to 140 F (-40 C to +60 C) Weight: 6 lb (2.72 kg) Comments: Integral junction box with three 7/8 in. conduit openings

(fittings not included)

Approvals Underwriters Laboratories, Inc: UL873, Plenum Rated Canadian Underwriters Laboratories, Inc: cUL C22.2 No. 24-93

Commercial

Product Number

ML4125A1008/U Two position;

ML4125B1007/U Two position;

ML4125C1006/U Two position;

ML4125D1005/U Two position;

ML8125A1004/U Two position;

ML8125B1003/U Two position;

Control Signal

SPST

Timing (seconds) Power Consumption

Maximum Driving @ 60 Hz

40 sec 25 sec 25 sec 0.16A, 15W 0.10A, 5W 120 Vac

40 sec 25 sec 25 sec 0.12A, 18.6W 0.10A, 7W 230 Vac ±10% Mounting

40 sec 25 sec 25 sec 15.6 VA 4 VA 24 Vac

Nominal Driving @ 60 Hz

Maximum Spring Return (sec) Driving Holding

Supply Voltage Includes

+10%, -15%

+20%, -10%

Ground Screw

bracket

Mounting bracket

Spring Return Direction

CCW

Components

70-6910 389