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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Honeywell ML7984B, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Honeywell ML7984B one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Honeywell ML7984B. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Honeywell ML7984B should contain:
- informations concerning technical data of Honeywell ML7984B
- name of the manufacturer and a year of construction of the Honeywell ML7984B item
- rules of operation, control and maintenance of the Honeywell ML7984B item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Honeywell ML7984B alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Honeywell ML7984B, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Honeywell service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Honeywell ML7984B.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Honeywell ML7984B item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
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 commo[...]
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Page 2
ML7984B 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 differenc[...]
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Page 3
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. 2. Although[...]
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Page 4
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. 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 [...]
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Page 5
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. "T5" and "W" terminals are facto[...]
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Page 6
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. The sensing circuits respond to the signal across the input termina[...]