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PRODUCT DATA
63- 2567- 3
® U.S. Registered Trademark
Copyright © 2000 Honeywell • All Rights Reserved
N314
ML4125, ML4135, ML8125, ML8135
Fast-Acting, Two-Position Actuators
FOR HEATING, VENTILATION AND
AIR-CONDITIONING APPLICATIONS
APPLICATION
The ML4125, ML4135, ML8125 and ML8135 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 for heating, ventilation, and
air-conditioning (HVAC) applications.
IMPORTANT
This actuator is not to be used in fire/smoke
applications requiring UL555/555S approval.
FEATURES
• Integral spring return.
• -40 to 130°F (-40 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.
ML4125, ML8125
• 100 lb-in. (11.3 N•m) minimum driving torque.
• 25 to 40 second drive timing (load dependant).
• Models available for 24, 120, and 230 Vac.
ML4135, ML8135
• 40 lb-in. (4.5 N•m) minimum driving torque.
• 20 to 25 second drive timing (load dependant).
• Models available for 24 and 120 Vac.
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
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 4
Operation .......................................................................... 6
Checkout .......................................................................... 6