Central heating boiler operating system - directs discharged heating medium to low temp. detection equipment

摘要

The operating system of a central heating boiler has protection against fuel flow where temp. in the vicinity of the burner is not high enough to itnite it, and also against overheating, shutting off the fuel supply parly or entirely on excess temp. or pressure and allowing discharge of heating medium from the boiler under these conditions. On such discharge, the medium is directed to the position where temp. is measured in order to operate the protective device preventing fuel outflow at too low temps.