There is leakage from the boiler

Dodano: 09:01, 17/01/2017

This is the result of condensation, “sweating” of the boiler (condensation), usually noticeable in the ash pan.

– the boiler operates at low temperatures (the recommended temperature is 60 degrees of Celsius), which causes “sweating” on back envelopes or in the chimney
– the boiler or chimney “overgrew” with soot.

You should clean and then burn the boiler at higher temperatures, using high-energy fuel. If it is not possible to maintain the recommended temperature, you should install the three- or four-way valve.