Marathon combination boiler

Does anyone have an information or help with heating house with in-floor heat using coal? I just can't seem to keep my water temperature around the 180 degree mark. Any suggestions? Thanks
http://www.marathonheaterco.com/boilers.html This is a link to a pic of my boiler...YCOB24.

Please don't DOUBLE POST, everyone is already answering your questions in the other posting you already did.

Just use the NEW TOPIC search at the top.

Marathon wood/coal/oil boiler