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<br />City of Arden Hills, MN – 25X.137753 LIFT STATION CONTROL SYSTEM <br />January 2026 PAGE 26 90 04-23 <br />©2026 Design Tree Engineering, Inc All Rights Reserved <br />PART 3 - EXECUTION <br /> INSTALLATION <br />A. Control panels shall be secured to concrete pad using stainless steel hardware. <br />B. Panels shall be constructed using fabrication techniques that allow for removal and maintenance of all <br />equipment after installation without removal of unrelated components. <br />C. Contractor shall provide all hardware required to install equipment. The Contractor shall review the <br />wiring diagrams for the equipment furnished and modify the wiring to conform to the requirements of <br />the equipment furnished. The Contractor shall not be compensated for extra labor and materials, which <br />are required to change wiring which was not confirmed with the equipment manufacturer’s drawings. <br />D. All programmable devices shall be completely programmed by the Contractor. This shall include <br />modification in the field to obtain the mode of operation as specified herein. Programming shall be <br />done in such a manner as to allow complete access to the program in the future by the Owner for <br />changes and or additions. Program locks shall not be used. <br />E. Adjust trip settings of circuit breakers and motor circuit protectors with adjustable instantaneous trip <br />elements. Initially adjust at six times the motor nameplate full-load ampere ratings and attempt to <br />start motors several times, allowing for motor cooldown between starts. If tripping occurs on motor <br />inrush, adjust settings in increments until motors start without tripping. Do not exceed eight times the <br />motor full-load amperes (or 11 times for NEMA Premium Efficiency motors if required). Where these <br />maximum settings do not allow starting of a motor, notify Engineer before increasing settings. <br />F. Install wiring between equipment and remote devices as specified and as required for the control <br />specified in other sections. <br /> CONTROL PANEL <br />A. The equipment mounted within the enclosures shall be mounted on the enclosure back panel, neatly <br />organized, and shall be in accordance with the manufacturer’s recommendations. <br />B. All wiring within the enclosure shall be through the plastic wiring ducts with maximum 60% fill. All <br />wiring not in ducts shall be in plastic spiral bindings. All I/O devices shall be wired to rail mounted <br />terminal blocks. <br />C. All field wiring shall terminate at the rail mounted terminal blocks that shall be mounted either at the <br />bottom or on the side of the enclosure back panel depending on where the I/O conduits penetrate the <br />enclosure. <br />D. The field wiring terminals shall be clearly identified as to which I/O terminals they are wired. <br />E. Jumpers between adjacent terminal blocks shall be copper jumper bars supplied by the terminal block <br />manufacturer. <br />F. Install all the system equipment including PLCs and interconnecting cabling as required. This work shall <br />include all interconnection wiring from new and existing equipment as required for the completion of <br />the system. <br />G. It shall be the responsibility of Contractor to ascertain that all field devices are compatible and <br />consistent with the new system design. This includes reviewing drawings and data to ascertain the <br />compatibility and consistency of the system with the field devices on such considerations as: <br />1. Equipment size and available space. <br />2. Power levels. <br />3. Power sources. <br />4. Logic schemes.