Oil furnace question

You can get an aquastat that has 2 heat-sensitive bulbs... One goes outside, and one senses the boiler water temperature. These units track the outside temperature, and raise and lower the boiler water temperature as the outside temperature changes. They can be a real fuel saver.

How are the controls on your boiler wired... does it always stay at a fixed temperature as long as it's turned on, or does it only fire as long as the circulator pump(s) is running, and only heat up to full limit temperature if the pump(s) stay on long enough?

Here's a link to an energy conservation site that gives some suggested temperatures... see "Aquastats", the last paragraph on the page.

Link