Marcuss wrote:Still cant get temp over 160.
How often are you shaking down and reloading
Are you getting rid of all possible ash during shake down (ash bound) red coals falling thru during shake down
how much coal are you loading in,you want to fill it to top of fire brick at least 6" or 8" thick firebed covering the entire width of fire box
how much combustion air and how much over fire air are you giving it
what are you aqua stats set at
Marcuss wrote:Once I get a decent fire going with wood I add the coal a spade shovel at a time until I get about a 5 gallon bucket full. The fire burns well until I damper it down then about 30 minutes later it is almost out.
sounds like too much secondary air or not letting the new load of coal fully ignite
Marcuss wrote:Damper control works good. Load is Hydronic tubing and fin tube. Over the weekend it worked great had 180 water temp over the weekend for the first time. Every Sunday I remove cap at clean out tee and there was a slight obstruction in flue. Cleaned flue and now water will not rise above 130. I installed a manual damper on Monday water temp still low and fire goes out.
what is your draft reading,do you have a manometer
what happened differently over the weekend to get a 180* hot boiler(any clue?)
Marcuss wrote:Burning coal. Not sure how you size coal but pieces are fist size.
have you tried using smaller size coal,like nut size.Try to sort thru your coal pile and get 2 buckets full of smaller size coal and try that also
GOOD LUCK AND KEEP AT IT