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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Greenheck Extruded Backdraft Damper EM-40, 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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First and foremost, an user manual of Greenheck Extruded Backdraft Damper EM-40 should contain:
- informations concerning technical data of Greenheck Extruded Backdraft Damper EM-40
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Table of contents for the manual
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Page 1
Application and Design The EM-40 series is a horizontally mounted backdraft damper that is designed to allow vertical airflow down and prevent reverse airflow. The damper is opened by air pressure differential and closed by gravity. Standard models include adjustable counterbalance weights to assist closing. Ratings (See page 2 for specific limitat[...]
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Page 2
Specifications Backdraft dampers meeting the following specifications shall be furnished and installed where shown on plans and/or as described in schedules. Dampers shall consist of: heavy gauge 6063T5 extruded aluminum channel frame (0.125 in.[3.2mm] thick) with 3 1 Ú 8 in. (79mm) depth; blades from 0.070 in.(1.8mm) 6063T5 extruded aluminum; 3 /[...]