How do you connect a push-button (impulse switch) to a bathroom fan?

A push-button is used to manually start the bathroom fan for a predefined time period. The push-button is connected between L, which is the live phase, and LT, which is the control signal on the fan. When the button is pressed, the fan starts and runs for the number of minutes set on the built-in timer, typically adjustable from 2 to 30 minutes. When the set time has elapsed, the fan switches off automatically. This provides a simple and energy-efficient way to ventilate the bathroom as needed. If you are not comfortable with electrical wiring, we recommend contacting the service company that installed the system or the retailer where the product was purchased.