Honeywell ML4105 User Manual

For fire/smoke control applications, Application, Features

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PRODUCT DATA

® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved

N314

63-2540-9

ML4105, ML4115, ML8105, ML8115

Fast-Acting, Two-Position Actuators

FOR FIRE/SMOKE CONTROL APPLICATIONS

APPLICATION

The ML4105, ML4115, ML8105, and ML8115 Fast-Acting,

Two-Position Actuators are spring return direct coupled

actuators (DCA) with an integral junction box for on/off

damper control. The actuator accepts an on/off signal from a

single-pole, single-throw (spst) controller. Models are

available with clockwise (cw) or counterclockwise (ccw) spring

return and are designed to operate reliably in smoke control

systems requiring Underwriter’s Laboratories Inc. UL555S

ratings up to 350°F.

FEATURES

• 30 lb-in. (3.4 N•m) or 50 lb-in. (5.7 N•m) minimum

driving torque at 350°F (176°C).

• Integral spring return ensures level of return torque.
• Fifteen-second spring return timing.
• No special cycling required during long-term holding.

(See Operation section.)

• No audible noise during holding.
• Patent pending design eliminates need for limit

switches to reduce power consumption.

• Models available for 24, 120, and 230 Vac.
• Ninety-five degree angle of rotation.
• Actuator holds rated torque at reduced power level.
• Die-cast aluminum housing.
• Housing design allows flush mounting to damper.
• Integral junction box with three conduit openings

eliminates need for separate wiring box.

• High-temperature indicator included.

APPLICABLE LITERATURE

— Motor/Actuator Selection Guide

for Damper Applications

63-8419

— Engineering Manual of Automatic Control

(also called The Gray Manual)

77-1100

— Direct Coupled Actuator

Quick Selection Guide

63-8553