Brown86 wrote:This is my first year burning coal. I have an early 1900s 2 story home in the Northeast. I have always burned wood as my primary heat with oil backup. With getting older and time restraints do to my job, taking care of wood was becoming more difficult. So, I did some research and decided on coal over wood pellets. Many people I know are also burning coal and love it. I purchased a LL Hyfire II and have it in my basement. I had a plenum and some new duct work professionally installed. It works really well. My house is at a consistent 74. The problem that I am having is that I feel I am burning more coal than I should. I am basing this only on what others who burn coal have told me. I am going through 3-4 bags/day during our current cold snap (some nights -10 degrees). So, is this the norm or is there something in my coal-trol that needs to be changed? I have it mounted on a first floor inside wall where my oil therm. has always been. I have the min at 6, max 40, and cft 8. It's in the round robin mode. This is pretty much the factory settings. I have both burners running at the present time and the feed rate rarely ever gets above 50. Usually is much lower. 1 burner works too hard at our current temps and coal is wasted by falling into ash pan before completely burning. I freely admit that I don't understand all the different settings. Any ideas would be greatly appreciated.
pvolcko wrote:HI Dave,
Nice crib sheet.
FR is 0-99 and it is in fact 0-99 in the stoker time control logic. You will notice that when FR is at 99 and MAX is at 99 there is at least a 1 second period where the stoker motor turns off. There are historical reasons why it is this way in the current software, but I fully expect that in the next rev we will be switching this over to a full 0-100 display and updating the control logic to allow for a full on cycle.
Also, while fan speed % will track more or less directly to FR, there is a delay possible when there is a step change in the FR and the fan speed is catching up to that new percentage. For instance, if you make a large setpoint change the FR will jump some amount. It can take up to 15 minutes for that new FR percentage to be reflected in the fan speed observed. But, while FR is tracking gradual changes throughout the day there is effectively no delay between FR and fan speed. The greater any change in the FR the more delay there is for the fan to catch up.
I'd have to check the code to be sure if it is a 100 second cycle or a 120 second cycle. For some reason I'm thinking it is 120 seconds now, where as V1 and some earlier V2 models may have had a 100 second cycle. I'll check and report back on a definitive answer.
I am basing this only on what others who burn coal have told me. I am going through 3-4 bags/day during our current cold snap (some nights -10 degrees). So, is this the norm or is there something in my coal-trol that needs to be changed?