presostato caldera saunier duval 7 wn864wo/s Reference: 4919820300 / C00864886

Reference: 4919820300 / C00864886

so it must be installed together with the appropriate safety system

HB76AS550E/04 SIEMENS

Home ventilation

presostato caldera saunier duval 7 wn864wo/s Reference: 4919820300 / C00864886The pressure switch is an electronic safety component for Saunier Duval boilers that detects the pressure or airflow in the combustion system. Its function is to ensure that the fan properly expels the burnt gases before the boiler ignites the burner, thus preventing risks of malfunction or accumulation of dangerous gases. What problem does this replacement part solve? The boiler does not start due to lack of airflow detection. Unexpected shutdown of