Can you explain the basics of what the 3 adjustments are for and what is best for the burner to operate at peak efficiency in different climates. For instance, right now the average temp for my area is in the mid 20's. what would be the best high and low settings and how should I adjust these settings in the warmer months? From what you have told me so far the differential alows the temp to drop the designated amount below the low setting? what is the point of having the differential? why wouldnt a high and low setting be enough?
Page 7 fig 12 will explain this in greater detail
When you set the diff setting at say 10 it will fall 10 degrees below the low setting and fire up even if it is not calling for heat to maintain the water temp? so is setting the diff at larger intervals such as 20 better in certain instances? My main reason for these questions is I want to set the settings at the appropriate numbers durning different seasons so that my burner operates as efficent as possible and uses the least amount of fuel oil. I am not concerned with having to wait a minute for my hot water to heat up.
For instance it may make sense for me to set the diff at 10 durning the winter but adjust it during the summer when the heat isnt on in the house so that the burner isnt firing all the time just to heat the water that I am only using once a day.