APPARECCHIATURA DI RISCALDAMENTO A COMBUSTIBILE SOLIDO DOTATA DI UN CIRCUITO DI SICUREZZA E RELATIVO PROCEDIMENTO DI FUNZIONAMENTO IN CONDIZIONI DI EMERGENZA

Present invention refers to a solid fuel heating apparatus (100) comprising a combustion chamber for accommodating the fuel, at least a first fan with an adjustable speed electric motor (15) for allowing the inlet of combustion air into said combustion chamber and the expulsion of combustion fumes, first command and control means (10) for controlling the functioning of said apparatus (100) under normal operating conditions and under emergency conditions and an uninterruptable power supply (8) for powering said first fan (15) under emergency conditions. In particular, said apparatus also comprises a safety circuit (9) provided with at least a first capacitor (C1) associable with said first fan (15), said safety circuit (9) being electrically interposed between said uninterruptable power supply (8) and said first fan (15) for determining, under emergency conditions, a capacitive drop of the power supply provided to said first fan (15) by the uninterruptable power supply (8) to an operation value preset for the emergency condition. Present invention also refers to an operating procedure under emergency condition of a solid fuel heating apparatus (100).