Instruction/ maintenance manual of the product ML7984B Honeywell
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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.
ML7984B SPECIFICATIONS • ORDERING INFORMATION Specifications IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances.
Installation ML7984B SPECIFICATIONS •INSTALLATION FIG. 1 -- DIMENSIONS OF ML7984 VALVE ACTUATOR IN MM (INCHES). FIG.2 -- MINIMUM MOUNTING CLEARANCE. ! CAUTION 1. Installer must be a trained service technician. 2. DO NOT electrically operate the ML7984 before assembly to the valve because damage not apparent to the installer may occur.
ML7984B INSTALLATION 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.
ML7984B WIRING 4 24 Vac 1 2 ML7984B L1 L2 T5 T6 R W C 3 SIGNAL SOURCE B + 2-10 Vdc PWM OR + T6 28 Vdc - T5 1 3 2 4 Allow 0.5 amps maximum for each device. Actuators and controller can share same transformer providing the VA rating of the transformer is not exceeded and proper phasing is observed.
ML7984B 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 (See Fig.7). The internal circuitry provides dc power for the electronic sensing and drive motor circuits.
An important point after buying a device Honeywell ML7984B (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell ML7984B yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell ML7984B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell ML7984B you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell ML7984B will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell ML7984B, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell ML7984B.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell ML7984B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell ML7984B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
