Why is the positioner for the outdoor air damper of an HVAC air handling unit interlocked with the supply fan?
a. So the damper will close when the fan starts
b. So the damper will open when the fan starts
c. So the fan starts when the damper opens
d. To ensure the fan stops when the damper is fully open
e. To ensure the fan starts when the damper is fully closed
Answer: B