A drive unit (1) for translational actuation of a diverter valve for heating devices has an electric motor (3), a gearbox which converts the rotational movement of the motor into a stroke movement for a valve shaft (4), and a switch (14) for switching off the motor when the valve ...
The adapter comprises a heat exchanger having a first fluid passageway capable of being intercommunicated to the gas water heater, and a second fluid passageway interchanging heat but physically isolated with said first fluid passageway; a first diverter valve connected to the first fluid passageway ...