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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
— Damper Torque Calculator 63-8437
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Applicable Literature ......................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 4
Operation .......................................................................... 6
Checkout .......................................................................... 6