Wotseurba wrote:How long does the boiler take to recover from 160° to 180° with no external heat load?
The S-130 holds approximately 27 gallons of water at 8 lbs per gallon or 216 lbs of water. It takes 1 BTU to raise the temperature of 1 lb of water 1 degree F. So it takes approximately 4320 BTU to raise the temperature from 160 to 180. At rated input of 130,000 BTU, which is an out put of about 110,000 BTU at an efficiency of about 85%, it should take 4320/110,000 of an hour, assuming that there is no load on the boiler, or a little less than 3 minutes.
By the way do you have a reason to be operating at 180 degrees? With solid fuel appliances it has been reported elsewhere on this board that it is desirable to have 40 to 50 degrees between the operating set point and the high limit. The manual that came with my S-130 says the maximum safe water temperature is 200 degrees. That leads me to conclude that the high limit should be set at 200 and that leads to an operating set point of 160 or less.