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A pneumatic system uses what to control components?
A controller sends what to a controlled device?
What do closed loop systems have but open loop systems do not?
What is the main difference between primary controllers and secondary controllers?
Unlike switches, relays do not control what?
Which of the following control types is not one of the 4 main modes of operation?
What must be done when a patient room temperature setpoint is overridden using the building automation system?
What does a diamond symbol in the building automation system graphics user interface indicate?