I recently picked up this burner and was excited to use it to bring my wort to a boil. I had it cranked up pretty high and it took about 15 minutes to bring 6 gallons of wort to a rolling boil in a stainless steel kettle. Is there an ideal time it should take to bring the wort to a boil? If I boil it too quickly is it possible that I'll burn the wort? Is there a way to tell if I am burning my wort?
Commercial micro-brewers can bring 10 barrels (2880 pints) to the boil in 30 - 45 mins using a gas jet of flame in a pipe that passes through the kettle - can't remember the technical name for it. What they do do, though, is recirculate the wort whilst they heat. This will keep it on the move and prevent hot spots/scorching/caramelising and any other problems that might occur from high temperatures acting on the wort.
So, I think you should be careful if you use too high a heat to boil it quickly. Consider keeping it on the move. I am sure overheating will be apparent by dark deposits on the 'hot' zone of your kettle. These deposits can contain carcinogens, so it is best not to let them build up.