Hog Slat Inc. Newton Grove, NC USA January 2023 REV A1 6 Pit Scraper Systems Maximum Run Timer Set-up REFER TO FIGURE 2 The Maximum Run Timer limits the amount of time the scraper motor is enabled to run. As a safety precaution, the max run timer disables the power going to the scraper motor while it rests idle between cycles as well as stops the scraper motor in case of a limit switch, belt, cable, or other malfunctions. Max Run Timer starts at the beginning of an event. Once time has elapsed, the scraper motor will not run until the next “OFF” or “ON” event. The Max Run Timer should be set for approximately 2 minutes more than the time it takes the scraper to travel one full length of the barn plus the pre-soak delay time. This will allow the scraper to travel and contact limit switch. If the maximum run timer elapses, the motor will shut off. Max Run Timer will reset once the next event has occurred to move the scraper in opposite direction. See FIGURE 2 for Maximum Run Timer Relay Adjustment dial identification. The “Range” Dial represents the range of time in minutes. Most cases this will be set to .1H which equals 6 minutes. The “Time” dial is the number to multiply by the range value. Maximum run time value = “Range setting” x “Time” setting. For example: Range setting: .1 H Time setting: 3 Maximum run time = .1 x3 = .3 H or 18 minutes Barn example: A 200FT[60M] barn requires 8 minutes to travel full length and pre-soak delay of 10 minutes. Max Run Timer should be set for approximately 20 minutes, (8 min. travel time+10 min pre-soak + 2min. = 20 minutes.) Range Dial set to .1h, Time dial set to around 3.5. This would equal approximately 21 minutes
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