Installs, maintains, adjusts and calibrates instrument and controls for the heating maintenance unit such as gauges, meters, thermometers, pyrometers, liquid level controls, pressure controls, carbon dioxide indicators, draft and smoke indicators, oil burner smoke scale indicators, analyzers, recorders, safety valves and heating controls operated electrically, electronically and pneumatically. Working knowledge of the functioning, purpose and location of all air conditioning equipment in the system operated, including but not limited to: absorbers, or centrifugal compressors, starters, circuit breakers, condensers, evaporators, heat exchanges, chilled water and condenser water pumps, filters, fans, controls, motors, thermostats, humidifiers, cooling towers, heating and cooling coils, recorders, and alarms.