The government requires testing and troubleshooting of the communications BUS to all controllers and terminal equipment, including minor wiring repairs such as re-terminating controllers and devices. Major repairs are excluded, such as high-bay/ceiling wire replacement or device terminations over 10 feet in height and long runs over 25 feet. The work includes testing network and field controller I/O control/monitoring points and equipment responses, and coordinating with remote software engineers to verify points and equipment in graphic utility interface systems. Covered systems include paint booth air handlers, exhaust fans, breathing air, chilled water, heating water, machine shop air handler and terminal units, office air handler and