Calorific value heating boiler has feed and return coils connected to end plates of housing which have water connections

摘要

The heating boiler has a burner housing (1) and a heat exchanger with feed and return coils (VL,RL) which are intercalated and extend in parallel. The coils define a serpentine gap for the flow of heating gas. The return and feed channels are formed in the housing front and rear walls with water feed plates (7,8) and water connections.