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Honeywell ML7984B User Manual

Valve actuator
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The ML7984B is a self-contained, self-adjusting,
linear motorized linkage that mounts directly
onto V5011 two-way or V5013 three-way valves
and provides up to 19 mm (3/4") of linear travel
(stem lift). For use with a Pulse Width Modulating
or alternately a 2-10Vdc analog signal controller.
• Allows the use of one common transformer power
supply for multiple actuators and controllers
• Field configurable DIP switches for 5 PMW modes
and 2-10Vdc signal inputs.
• Field configurable DIP switches for Direct / Reverse
action
• One device for either Vac or Vdc power supply
application
• Compatible with 3 -wire system (one common wire
for both signal & power inputs)
• For 1/2" to 3" V5011 / V5013F &G valves
• Self-contained, motorized valve linkage.
• Linkage self-adjusts to valve stroke of up to 19 mm (3/4")
PCY • 2-96 • © Honeywell Ltd. 1996 • Printed in Canada * Form number 95C-10808
ML7984B
VALVE ACTUATOR
• Multipoise mounting
• Strong valve seat closing force 710 Newton (160
lbs.)
• Compact size for easy installation in confined areas
• Electronic current sensing provides internal
protection and positive full closing force
• Field-addable auxiliary switches available
CONTENTS
Specifications.......................................... 2
Order information................................... 2
Installation.............................................. 3
Wiring Schematics.................................. 5
Operation and Checkout......................... 6

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  Summary of Contents for Honeywell ML7984B

  • Page 1: Table Of Contents

    • Linkage self-adjusts to valve stroke of up to 19 mm (3/4") Specifications.......... 2 Order information........2 Installation..........3 Wiring Schematics........5 Operation and Checkout......6 PCY • 2-96 • © Honeywell Ltd. 1996 • Printed in Canada * Form number 95C-10808...
  • Page 2: Specifications

    If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Home and Building Control Sales Office ( check white pages of your phone directory ). 2. Home and Building Control Customer Service Department Honeywell Limited/Honeywell Limitée...
  • Page 3: Installation

    ML7984B SPECIFICATIONS •INSTALLATION FIG. 1 -- DIMENSIONS OF ML7984 VALVE ACTUATOR IN MM (INCHES). Installation Mounting: 1.Ensure that the valve body is installed correctly, that is, the arrow points in the direction of the flow. 2. Although the actuator can be mounted in any position, it is preferable that the ML7984 is mounted above the valve body.
  • Page 4 ML7984B INSTALLATION FIG.3 -- PREPARATION FOR VALVE ASSEMBLY. FIG. 4 -- ASSEMBLY OF ML7984 TO VALVE. 5. Remove the plastic cover from the ML7984 by loosening the two screws located on the top (Note: These screws are captive. Rotate three complete revolutions to remove cover ).
  • Page 5: Wiring Schematics

    PWM: min. 0.59 sec + 0.00918 sec increments (max. 2.93 sec ) NOVAR Reverse Acting Analog: 2-10 Vdc Configuration DIP switches NOTE: located adjacent to the input Turn power off before setting the DIP switches. terminal block Fig. 7 Wiring for ML7984B actuators...
  • Page 6: Operation And Checkout

    (e.g. stroke mid 4. With 24Vac or 28Vdc power source connected to T5 & position is: 0.1s +128 x 0.01s = 1.38 s). The ML7984B T6, actuator operation can be verified by connecting supports 5 different PMW timebased modes.