When does the VP-1000 pump activate?

The VP-1000 pump is designed to activate specifically when the nozzle is lifted from its holster. This function is crucial for vapor recovery systems, as it ensures that the pump engages when a fuel dispensing operation begins. By activating in this manner, the system effectively captures vapors that would otherwise escape into the atmosphere, thus reducing emissions and complying with environmental regulations. This mechanism also helps to provide a safe and efficient refueling process.

The other scenarios presented do not align with the intended operation of the VP-1000 pump. For instance, activation upon turning off the power would be counterproductive since the system would not be operational. An activation based on temperature exceeding 40 degrees does not relate to the pump's functionality, as the pump's operation is not temperature-dependent but rather tied to user action. Additionally, requiring a manual reset for activation would hinder the automatic activation feature essential for the seamless operation of the fuel dispensing process.