Illustrative Only) Installs, operates, monitors, inspects, maintains, and repairs, heating, ventilation, air conditioning and refrigeration systems throughout all County facilities; systems include state-of-the-art electric, diesel, and natural gas, general and special purpose air conditioning systems, refrigerators, and freezers; checks and monitors heating, ventilation, refrigeration, and air conditioning systems to ensure systems and controls are operating properly; reads and calibrates gauges, computerized Digital Control Systems (DCS), thermostats, and thermometers; checks expansion coils for excessive ice formation, listens for unusual noises; checks oil and refrigerant level in systems and checks piping and fittings for refrigerant leaks; checks air filters for cleanliness, check operation of fans, dampers, louvers, and controls of air movement; tests and treats water in closed heating and cooling systems and water cooled condensers to control deposits of solids and algae; conducts periodic and routine inspections of public building HVAC systems, exhaust fans and similar equipment, control systems and units. Ability to: Be exposed to exhaust, chemical fumes and hazardous materials; lift 25 pounds; work in varying extreme weather conditions; work varying shifts, weekends, and holidays; recognize hazardous conditions and react appropriately; establish and maintain effective working relationships with co-workers; follow written and verbal instructions; stand and bend (30%); walk and stoop (20%); perform the essential functions of the job specifications with or without a reasonable accommodation.