Laserfiche WebLink
OSTP Pump Tank <br />Design Worksheet <br />TIMER or DEMAND FLOAT SETTINGS <br />Select Timer or Demand Dosing: <br />A. Timer Settings <br />12. Required Flow Rate : <br />A. From Design (Line 12 of Pressure, Line 10 of Non-Level or Line 6 of Pump*): GPM <br />B. Or calculated: GPM = Change in Depth (in) x Gallons Per Inch / Time Interval in Minutes <br />min = GPM <br />13. Flow Rate from Line 12.A or 12.B above.GPM <br />14. Calculate TIMER ON setting: <br />Total Dosing Volume/GPM <br />Minutes ON <br />15. Calculate TIMER OFF setting: <br />Minutes Per Day (1440)/Doses Per Day - Minutes On <br />÷ doses/day - min =Minutes OFF <br />16. Pump Off Float - Measuring from bottom of tank: <br />Distance to set Pump Off Float=Gallons to Cover Pump / Gallons Per Inch: <br />gal ÷ Inches <br />17. Alarm Float - Measuring from bottom of tank: <br />Distance to set Alarm Float = Tank Depth(4A) X 90% of Tank Depth <br />in <br />B. DEMAND DOSE FLOAT SETTINGS <br />18. Calculate Float Separation Distance using Dosing Volume . <br />Total Dosing Volume /Gallons Per Inch <br />Inches <br />19.Measuring from bottom of tank: <br />A.Distance to set Pump Off Float = Pump + block height + 2 inches <br />in + in = <br />Inches <br />B. <br />in + in = <br />Inches <br />C.Distance to set Alarm Float = Distance to set Pump-On Float + Alarm Depth (2-3 inches) <br />in + in = <br />Inches <br />Inches for Dose: in <br />in 43.2 in <br />Pump On in Gal <br />Pump Off in Pump Off 14.0 in Gal <br />Gal <br />DEMAND DOSING <br />in X 0.90 = <br />5 <br />18.8 <br />18.8 <br />43.2 <br /> <br />92 <br />402 <br />gal ÷ <br />29 <br />92 <br />1440 min <br />29.0 <br />3.2 <br />48 <br />gal/in = <br />29 <br />3.2 <br />263 <br />TIMED DOSING <br />Distance to set Pump On Float=Distance to Set Pump-Off Float + Float Separation Distance <br />14.0 <br />Alarm DepthAlarm Depth <br />*Note: This value must <br />be adjusted after <br />installation based on <br />pump calibration. <br />gal/in ÷in X <br />gpm =gal ÷ <br />gal/in = <br />284.8 <br />FLOAT SETTINGS <br />263.2 <br /> <br />Timer Demand Dose