Assume a single-zone constant-volume system with an economizer is installed. In the occupied mode, when
the thermostat calls for cooling, which of the following occurs?
a. The supply air fan stops.
b. The outdoor dampers move to fully closed.
c. The economizer acts as the first stage of cooling, if conditions permit.
d. The relief fan cycles on.
c
You might also like to view...
In Figure 17-9, explain why FIC-402B is opening the valve to 100%.
What will be an ideal response?
How can you tell the difference between humus peat (muck) and sphagnum peat moss? Which is preferable for use in potting media and why?
What will be an ideal response?
A sow in estrus will display standing heat and winking of the vulva when a boar approaches.
Answer the following statement true (T) or false (F)
A current magnetic relay opens and closes its contacts based on the ____.
A. current in the start winding B. voltage across the start winding C. voltage across the run winding D. current in the run winding