TABLE OF CONTENTS The installation of instruments, control systems, and their accessories follows the final stage of the engineering design. The installation is then followed by commissioning and plant startup. It is important to prepare an installation specification that defines the owner's requirements this prevents misunderstandings, extra costs, and construction delays. The content of such a specification typically covers the following topics: code compliance, scope of work, installation details, equipment identification, equipment storage, work specifically excluded, approved products, pre-installation testing, execution, wiring, tubing, and checkout. All of these are discussed in this chapter. It should be noted that the following guidelines apply to the majority of installations. Certain harsh or special environments may need additional requirements.
It should be the responsibility of the installing contractor to ensure compliance even though the owner produced all engineering documentation and may be reviewing and approving all installation. All equipment and installation must comply with the codes in effect at the site. There will be cases where the drawings or specifications call for material, workmanship, arrangement, or construction of quality that is superior to that required by any applicable codes. In such cases, the drawings and specifications should prevail. Otherwise, the applicable codes and standards must always prevail.
To comply with local codes and especially with insurance requirements, all electrically operated instruments or the electrical components incorporated in an instrument should be approved and bear the approval label (UL, FM, CSA, etc.). Modifications to an approved piece of equipment may void the approval.
