Features 12-zone base model, expandable to 48 zones using SLM12 hot-swappable modules (Indoor/Outdoor rated) Internal transformer with commercial terminal block, On/Off power switch and LED status indicator Large backlit LCD display 2 run modes: Standard mode runs user input zone run times; Auto Adjust mode requires SLW Series On-Site Weather Station to calculate weather based run times Rain/Freeze sensor bypass/active button displays sensor status with tricolor LEDs (red indicates sensor is prohibiting irrigation; orange indicates an extended rain delay; green indicates normal operation) 4 programs: A, B, C; program D can operate concurrently 8 start times per program Nonvolatile memory and real time clock/calendar to retain programs and current date and time - no battery required Zone run times from 1 min. to 9 hrs. 55 min. with operation countdown displayed in hours, minutes, and seconds Watering day selections of custom days of the week, odd/even, or interval days (1 - 30 days) Omit settings: omit time of day window, omit day(s) of week, and omit up to 7 calendar dates Monthly % adjust by program, for simple year round water budgeting Advanced Functions Fault review displays all faults, including open and shorted zones On-board multi-meter displays transformer voltage; milliamp measurement for each zone Built-in valve locator chatters the solenoids (U.S. Patent No. 7,406,363) Review menu displays ET deficits by zone , and corresponding zone run times Review menu displays maximum run time and minimum soak times Review menu displays temperature readings (daily high/low) for previous 5 days Review menu accumulates total run times by zone Programmable rain delay of 1 - 7 days SLW Weather Station extended rain delay programmable from 0 - 99 hours Run/Soak cycles allow setting of maximum run time and minimum soak time by program for use in Standard mode only Programmable zone-to-zone delay 1 min. - 3 hrs. Programmable master valve timing sequence with ??On Delay" (1 sec. - 1 min.; 2 sec. default) and ??Off Delay" (1 sec. - 3 min.; 5 sec. default) to allow for line fill and slow-closing valves Master valve/pump start operation assignable On/Off by zone Clear program function to selectively delete an individual program Clear all function to delete all programs Backtrack stored program feature allows contractor to easily store a default program and retrieve the saved program in the event a customer improperly reprograms the SL4800 Auto Adjust Features ZIP Code input (5 digit) or Latitude input (ñ60ø from EQUATOR) establish location of site for solar radiation calculation Sprinkler type input allows selection for zone sprinkler type (SPRAY, ROTOR, DRIP, BUBBLER) with preset precipitation rate or specific input of the zone precipitation rate (.2 - 3.0" per hour) Plant type input allows selection for zone plant type (COOL TURF, WARM TURF, SHRUBS, ANNUALS, TREES, NATIVE) with preset crop factors or specific input of the zone crop factor (10 - 300%) Soil type input allows selection for the soil type (CLAY, SAND, LOAM) and slope (0 - 25ø) for the purpose of automatically calculating a run/soak period to virtually eliminate run off More/Less is settable by zone (-50% to +25%) for the purpose of fine tuning Auto Adjust run times to accommodate factors like shade, wind, and sprinkler inefficiencies Manual Operation Manual test runs each zone with zone run times from 10 sec. up to 10 min. Manual zone operation of a single zone (1 min. to 9 hrs. 55 min.) Push button manual start of a program from control panel Electrical for SL4800 Input: 120VAC/60Hz @ 400mA for 5 valves Output: 28VAC, 1.2A maximum Fuse: 1.5A, slow blow
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