4 Control Schematics.PDF

This document is a schematic diagram for Air Handling Units (AHU-3 and AHU-4) located at Offutt Air Force Base. The technical drawing provides a detailed control schematic with various symbols representing electrical and mechanical components, including relays, valves, and other control devices. The schematic includes a legend explaining the different symbols and markings, and is part of a larger set of engineering documentation for a controls upgrade and mechanical system documentation project.

The schematic is specifically related to the 20th IS Controls upgrade and Duct cleaning solicitation (FA460025Q0053), which aims to replace degraded and obsolete Excel 5000 series controllers. The project involves updating control components for mission-critical functions, with the existing Base Management System using Honeywell Enterprise Building Integrator version 610 and currently transitioning to Niagara 4 Workbench. The solicitation is issued by the Department of the Air Force Air Combat Command, with offers due on 14 July 2025 at 10:00 AM CST, and a site visit scheduled for 26 June 2025 at 10:00 AM CST.