FC300 series motorized-heating two-way valves are mainly used to control the opening and closing of cold water and hot water in the terminal of the fan coil units within the air conditioning systems in order to provide a comfortable room temperature of the fan coil units of the air conditioning systems in order to provide a comfortable room temperature. When needed, the motorized heating valve will automatically turn on after receiving the control signal transmitted from the room temperature controller, then cool or warm the room as required. When temperature reaches the specified value, the room temperature controller will automatically cancel the output signal, and the motorized heating valve will turn off slowly, cutting off the water source. FC300 series motorized heating valves are set to be powered off prior to delivery.