Honeywell ML6874 manual

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Table of contents for the manual

  • Page 1

    ML6874 Valve Actuator PRODUCT DATA 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. FEATURES[...]

  • Page 2

    ML6874 SPECIFICATIONS • ORDERING INFORMATION Specifications IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions and some minor difference[...]

  • Page 3

    ML6874 SPECIFICATIONS •INSTALLATION FIG. 1 -- DIMENSIONS OF ML6874 VALVE ACTUATOR IN MM (INCHES). Installation FIG.2 -- MINIMUM MOUNTING CLEARANCE. ! CAUTION 1. Installer must be a trained service technician. 2. DO NOT electrically operate the ML6874 before assembly to the valve because damage not apparent to the installer may occur. Mounting: 1.[...]

  • 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 t[...]

  • Page 5

    ML6874 WIRING 3 SPDT Controller 2 ML6874 28 Vdc OR + T6 T5 24 Vac 1 L1 L2 T5 T6 W R B Caution: In multiple actuators connection, power supply to all actuators must be connected in a TRUE parallel fashion to reduce excessive voltage drop. DO NOT "daisy chain" i.e. connected to one actutator then branched to another. ! ML6874 2 W B R W B R [...]

  • Page 6

    ML6874 OPERATION AND CHECKOUT Operation and checkout Operation: The recommended valve actuator power source is a class 2, 24V transformer or 28Vdc across terminals T5 &T6. Internal circuitry provides dc power for the electronic sensing and drive motor circuits. The motor is controlled by a microprocessor. Connecting B to R tells the microproces[...]