Instruction d'utilisation Honeywell ML7984B

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ML7984B

VALVE ACTUATOR

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 • Multipoise mounting
supply for multiple actuators and controllers
• Strong valve seat closing force 710 Newton (160
• Fiel

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ML7984B SPECIFICATIONS • ORDERING INFORMATION Specifications Input Impedance: IMPORTANT: 20 KΩ The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, Shipping Weight: this product is tested and calibrated under closely controlled Approx. 1 kg (2.2 lbs) conditions and some minor differences in performance can be expected if those conditions are changed. Accessor

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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. This will minimize the risk of damage to the ML7984 in the event of condensation or a valve gland leak. 3. Remove the stem button (Fig.

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ML7984B INSTALLATION FIG. 4 -- ASSEMBLY OF ML7984 TO VALVE. FIG.3 -- PREPARATION FOR VALVE ASSEMBLY. 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 ). Drop either slot headed or Allen hex type of set screw (both are included in the plastic bag ) into the top of the shaft, slot/hex side up. 6. With a 5 mm (3/16") Slotted screwdriver or 1/8"x 6" Allen wrench (

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ML7984B WIRING 4 SIGNAL 3 2 ML7984B SOURCE 1 + R T6 2-10 Vdc L1 W 24 Vac L2 B T5 PWM C OR T6 + 28 Vdc T5 - Allow 0.5 amps maximum for each device. Actuators and controller can share same transformer providing the 1 VA rating of the transformer is not exceeded and proper phasing is observed. 2 "T5" and "W" terminals are factory connected internally. Device is compatible with the 3-wire control system. Use configuration DIP switches to select device functions: Direct a

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ML7984B OPERATION AND CHECKOUT Operation and checkout Operation: The recommended valve actuator power source is a class 2, ! CAUTION: 24V transformer or 28Vdc across terminals T5 &T6 (See 1. Disconnect power supply before beginning installation to Fig.7). The internal circuitry provides dc power for the electronic sensing and drive motor circuits. The sensing prevent electrical shock and equipment damage. circuits respond to the signal across the input terminals 2. All wiring must com