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Honeywell ML4125 Product Data

Fast-acting, two-position actuators for heating, ventilation and air-conditioning applications
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ML4125, ML4135, ML8125, ML8135
Fast-Acting, Two-Position Actuators

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.
® U.S. Registered Trademark
Copyright © 2000 Honeywell • All Rights Reserved
FOR HEATING, VENTILATION AND
AIR-CONDITIONING APPLICATIONS

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
- Engineering Manual of Automatic Control
(also called The Gray Manual)
- Direct Coupled Actuator
Quick Selection Guide
- Damper Torque Calculator
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Operation ..........................................................................
Checkout ..........................................................................
N314
PRODUCT DATA
63-8419
77-1100
63-8553
63-8437
Contents
1
1
2
2
4
6
6
63- 2567- 3

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  Summary of Contents for Honeywell ML4125

  • Page 1: Table Of Contents

    • 20 to 25 second drive timing (load dependant). • Models available for 24 and 120 Vac. 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 APPLICABLE LITERATURE damper control.
  • Page 2: Specifications

    Honeywell, 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 (612) 951-1000 In Canada—Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, Ontario M2H 3N7. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
  • Page 3 Minimum Damper Shaft Length: 1-3/4 in. (45 mm). (17) Timing: Drive Open: 6 3/8 ML4125, ML8125: 25 to 40 seconds (load dependant). (161) ML4135, ML8135: 20 to 25 seconds (load dependant). Spring Close: ML4125, ML8125: 20 to 25 seconds. ML4135, ML8135: 15 seconds.
  • Page 4: Installation

    ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS INSTALLATION When Installing this Product... 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
  • Page 5 ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS Installation IMPORTANT 1. All wiring must comply with local electrical codes, ordinances and regulations. 2. Voltage and frequency of transformer used with CAUTION ML8125 or ML8135 must correspond with the characteristics of power supply and actuator.
  • Page 6: Operation

    ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS OPERATION CHECKOUT The actuators are operated by an spst two-position controller. ML4125A,B, ML4135 (120 Vac model) When using an spst two-position controller, the actuator drives 1. Check damper position. to the damper fully open position when controller contact makes and spring returns to the damper fully closed position 2.
  • Page 7 ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS Montageanweisung Instructions d’Installation Istruzioni per I’Installazione Installatievoorschrift Installasjonsinstruks Installationsinstrukioner Asennusohje Installations Instrukioner Instrucciones de montaje A1, A4 24 VAC 230 VAC ASSEMBLY EINBAU MONTAGE MONTAGGIO MONTAGE MONTERE MONTERING ASENTAMINEN MONTERA MONTAJE M11874 M11875...
  • Page 8 ML4125, ML4135, ML8125, ML8135 FAST-ACTING, TWO-POSITION ACTUATORS 24 VAC 230 VAC M11887 DISASSEMBLY AUSBAU M11886 DÉMONTAGE SMONTAGGIO DEMONTAGE AFMONTERE DEMONTERE PURKAMINEN NEDMONTERA M11884 DESMONTAJE M11885 M11888 Home and Building Control Home and Building Control Honeywell Asia Pacific Inc. Honeywell Europe S.A.

This manual is also suitable for:

Ml4135Ml8125Ml8135