Adjustable inert gas generation assembly for water-based fire protection systems

A method of supplying an inert gas to a pipe network of a fire protection system, comprising the steps of:

• providing an inert gas generation assembly, comprising:
• an inert gas generator having an outlet in fluid communication with the pipe network and configured for selectively producing a flow of inert gas to the pipe network at a first purity and a first flow rate while in a first mode and a second purity and a second flow rate while in a second mode, wherein the second purity is higher than the first purity and the first flow rate is higher than the second flow rate, the first flow rate raising a current pressure within the pipe network to a supervisory pressure within a supervisory pressure fill requirement;
• and
• a control circuit in electrical communication with the inert gas generator and configured to selectively switch the inert gas generator between the first and second modes;
• sensing the current pressure within the pipe network;
• generating an input signal based on the current pressure;
• transmitting the input signal to the control circuit;
• determining in the control circuit whether the current pressure within the pipe network is less than or at least equal to or greater than the supervisory pressure and generating in the control circuit an output signal based on the determination of whether the current pressure within the pipe network is less than or at least equal to or greater than the supervisory pressure;
• and
• transmitting the output signal to the inert gas generator to selectively initiate the first mode when the current pressure within the pipe network is less than the supervisory pressure and to selectively initiate the second mode when the current pressure within the pipe network is at least equal to or greater than the supervisory pressure.