In Figure 39-33, what is the purpose of the potential relay? ...

[MirandaLo]

In Figure 39-33, what is the purpose of the potential relay?
 
  What will be an ideal response?

Question 2

What are the advantages of thermal storage systems?
 
  What will be an ideal response?

Question 3

In Figure 39-34, what does the field control wire on the thermostat B terminal connect to on the unit?
 
  What will be an ideal response?

[wilsonbho]

Answer to Question 1

To drop out the start capacitor

Answer to Question 2

Commercial electrical rates are lower at night. It takes less energy to make ice when it is cool at night. A smaller, more efficient system can do the job of a much larger unit by running for more hours.

Answer to Question 3

The defrost board

[MirandaLo]

Thanks for the timely response, appreciate it

[connor417]

Gracias!