This includes the knowledge of the operation of automatic temperature control systems, analog control devices, air compressors, air driers, valves, actuators, relays, fire dampers, air handling units, building air flow systems, fan sequence, control inputs and outputs, VAV controllers, VMA controllers and networked control systems. General Summary of Position: Incumbents in this series test, repair, install and/or maintain various types of electrical systems and equipment; troubleshoot electrical and related equipment; maintain adequate inventory of equipment and materials; inspect the work of outside contractors; and determine materials and/or equipment necessary for a job and on-the-job procedure changes.