Author Question: What is the purpose of an aquastat? What will be an ideal ... (Read 42 times)

SO00 · **on:** Jul 26, 2018

What is the purpose of an aquastat?

What will be an ideal response?

Question 2

Use the information on the data plate in Figure 89-24 to determine the minimum current rating for the unit disconnect.

What will be an ideal response?

nicoleclaire22 · **Reply #1 on:** Jul 26, 2018

Answer to Question 1

Aquastat controls are used for hot water oil fired furnaces. They maintain the furnace water at the proper temperature. There is a high limit setting and a low limit setting. The high limit will shut off the burner at a preset temperature.
When the water temperature reaches the low limit, the burner will start up again so that the water temperature does not drop too low.

Answer to Question 2

The disconnect should be sized at 115 of the minimum circuit ampacity 1.15 x 31.5 = 36.225 since disconnect sizes jump from 30 amps to 60 amps, a 60 amp disconnect will be needed.