Hog Slat Inc. Newton Grove, NC USA February 2022 2 Evaporative Cooling System System Calculations In order to properly set up the Auto-Drain OPEN TIME must be properly set. 1. The OPEN TIME needs to be calculated. For GrowerSelect evaporative systems this is simple, the run time is the same as the total length of connected trough. For example a 100 foot system should simply flush for 100 minutes. For GrowerSelect evaporative systems flow rate should be assumed to be 2.0 gal/min and water storage capacity should be assumed to be 2.0 gal/linear foot. The system info chart provided below provides additional lengths and OPEN TIMES for GrowerSelect Evap systems. Please note that each indicator on the run time potentiometer equals 20 minutes! System Info Length of System (ft) Total Water (Gal) Run Time (min) Run Time (Setting) 20 40 20 0 40 80 40 1 60 120 60 2 80 160 80 3 100 200 100 4 120 240 120 5 140 280 140 6 160 320 160 7 180 360 180 8 200 400 200 9
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