5901 23RD DR W ZAP ENERGY 2024-04-12

Background Extended Discharge Model This procedure predicts the extended discharge rate that is required for the extinguishing agent to maintain the Design Concentration for the specified hold time, based on the variables shown in this report. Due to the conservative assumptions regarding leakage distribution, this prediction model usually predicts a higher extended discharge rate than should be required, but not always. This prediction only applies to conditions as found at the time of the test. Additional penetrations, weather, open doorways, HVAC modifications, malfunctions and the inherent assumptions in the enclosure integrity procedure could all combine to give very different results in a real discharge. Leakage area defined for extended discharge rate The Total Enclosure Leakage test measures all unintentional holes in the enclosure, the sub -floor and the above - ceiling space, whether or not extinguishing agent will leak out of these holes. All intentional openings (such as installed pressure relief vents) must be held in their closed position but not sealed. The extended discharge rate (also the extinguishing agent leakage rate) is calculated from the Total Enclosure Leakage test assuming that half of the measured leakage is located in the ceiling and the other half is located in the floor. The measurement is performed over a range of pressures so that the exact leakage rate at lower pressures for agent loss will be known. The extended discharge rate that results from this test is worst case since it is assumed that half of the measured leakage is located in the ceiling and the other half is located in the floor. Leakage area defined for Peak Pressure Leakage for peak pressure does not depend on leak location, making the area from the Total Enclosure Leakage test accurate for use in peak pressure prediction. All intentional openings (such as installed pressure relief vents) must held in the positions they are expected to be in during the positive peak pressure spike during discharge. For halocarbons, this test must be repeated where all intentional openings (such as installed pressure relief vents) must held in the positions they are expected to be in during the negative peak pressure spike during discharge. The measurement is performed over a range of induced test pressures so that the exact leakage rate at the higher reference pressure of 125 Pa for venting will be known. The predicted peak pressure will then be based on an enclosure leakage that accurately represents the free vent area faced by the agent discharge. Page 4 of 12