HVAC Controls & BMS: Sensors, Valves, Setpoints & Trends | Lesson 4.3

The chiller plant can be in perfect mechanical condition — and the building can still be uncomfortable, because a single sensor is reading wrong. In this lesson you will learn how HVAC controls sense, decide and act, and how the Building Management System ties it all together — explained the way it works on site, not just in theory. In this lesson: Controls as the nervous system of HVAC: sense, decide, act Sensors and thermostats — and why bad data in means bad decisions out Control valves: 2-way vs 3-way, and why modern systems favor 2-way Actuators: the overlooked fault behind "the valve isn't where the system thinks it is" Setpoints: the target the whole system chases — and how temporary changes become permanent Schedules: one of the most common, and most expensive, controls mistakes Alarms: early warning system vs nuisance noise What a BMS is, and how it talks to the plant: controllers, points, BACnet and Modbus Reading BMS trends: how to spot a developing fault before the complaint arrives A site example: temperatures swinging every 20 minutes — a control loop problem, not a breakdown Four controls mistakes to avoid FM manager tip: check the trend before you send the technician Next lesson: 4.4 — Common HVAC Failures & Troubleshooting Method. #TheFMMentor #FacilitiesManagement #HVAC #BMS #BuildingAutomation #BACnet #HVACControls #BuildingServices #MEP #FMcareers