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Honeywell ML6874 Product Data

Valve actuator
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GENERAL
The ML6874 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 low voltage 3-wire SPDT
Series 20 (on-off) or Series 60 (floating) controllers.
PCY 02/98
© Honeywell Ltd. 1998 Printed in Canada
Valve Actuator
FEATURES
• Allows the use of one common transformer
power supply for multiple actuators and
controllers
• Self-contained, motorized valve linkage
• Linkage self-adjusts to valve stroke of up to
19mm (3/4")
• Multipose mounting
• Strong valve seat closing force 710 Newton
(160 lbs.)
• Compact size for easy installation in
confined area
• Field-configurable DIP switches for
Direct/Reverse action
• One device for either Vac or Vdc power
supply application
• Electronic current sensing provides internal
protection and positive full closing force
• Field-addable auxiliary switches available
Specifications..........................................2
Order information................................... 2
Installation.............................................. 3
Wiring Schematics..................................5
Operation and Checkout.........................6
ML6874
PRODUCT DATA
Contents
95C-10865

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Summary of Contents for Honeywell ML6874

  • Page 1: Table Of Contents

    GENERAL The ML6874 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 low voltage 3-wire SPDT Series 20 (on-off) or Series 60 (floating) controllers.

  • 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 Relations Honeywell Limited/Honeywell Limitée...

  • Page 3: Installation

    Assembly of ML6874 to the valve: 1. The drive shaft of the ML6874 has a threaded hole to link with the valve stem. Slide the yoke over the valve bonnet (Fig. 4) 2.
  • Page 4 ML6874 INSTALLATION FIG.3 -- PREPARATION FOR VALVE ASSEMBLY. 5. Remove the plastic cover from the ML6874 by loosening the two screws located on the top (Note: These screws are captive. Rotate three complete revolutions to remove cover ). Drop either Slot Headed or Allen Hex type of set screw (both are included in the plastic bag ) into the top of the shaft, slotted/ Hexed side up.

  • Page 5: Wiring Schematics

    Reverse Acting Mode NOTE: Turn power off before setting the DIP switches. Fig. 7 Wiring for SPDT controller to ML6874 actuators ML6874 24 Vac ML6874 In multiple actuators connection, power supply to all actuators must be connected in a TRUE parallel fashion to reduce excessive voltage drop.

  • Page 6: Operation And Checkout

    GENERAL NOTE: 1. For correct valve operation, the ML6874 must be field configured with the DIP switches which are located beside the terminal block, see wiring diagrams for details.