HVAC Controls quiz Flashcards
1
Q
Define deadband
A
range between heating and cooling in which neither will turn on
2
Q
List two types of control mediums
A
water, air
3
Q
What is set point ?
A
the desired temperature
4
Q
describe proportional band?
A
change in controlled variable required to change controller output from fully open to fully closed
5
Q
List different control loops and describe each one?
A
open - no feedback
closed- feedback
6
Q
What does RTD stand for and is it a positive or negative coefficient?
A
resistance temperature device, positive
7
Q
List two different control elements
A
actuator, valves, dampers
8
Q
Name two different drive types of actuators?
A
electric, pneumatic
