Spring Return Direct Coupled Actuator

ML4125; ML8125

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

FEATURES

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.

SPECIFICATIONS

 

Actuator Type

Damper

Rotational Stroke

95 ±3 degrees

Fail Safe Mode

Spring Return

Rated Torque

100 lb-in. (11.3 Nm)

External Auxiliary Switches Available ..

Yes, 32003532-005

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 audible noise)

Maximum Noise Rating,

 

Driving (dBA @ 1m)

65

Timing, Nominal Driving at 60 Hz

20 sec

Power Consumption, Driving

0.18 A/18 W or 18 VA

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

120 Vac +10%, -15%

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)

Includes

Ground Screw

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

 

 

DIMENSIONS DIAGRAMS

2 (51)

1 (25)

5/8

(17) 1

6 3/8

(161)

7 1/2

(192)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 (102)

2 (51)

 

 

 

 

 

3 5/16 (84)

 

 

 

 

 

 

 

 

1/16 (2)

7/8 (22)

1 ML4135/ML8135 HAVE SHORTER HUB WITH TWO SET SCREWS. ML4125/ML8125 HAVE LONGER HUB WITH FOUR SET SCREWS.

5 1/8 (129)

M17538

 

86

Page 86
Image 86
Honeywell MS4103 manual ML4125 ML8125, NEMA1