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Minnesota Pollution OSTP Pump Tank Sizing, Dosing and Float <br /> UNIVERSITY <br /> and Timer Setting Design Worksheet oF M�Nr,EsoTA � � , ,,,. <br /> Control Agency <br /> TIMER or DEMAND FLOAT SETTINGS <br /> Select Timer or Demand Dosing: O nmer OO pemand pose <br /> A. Timer Settings <br /> 13. Required Flow Rate: <br /> A. From Design(Line 11 of Pressure Distribution or Line 10 of Non-Level'): � GPM 'Note: This value must be <br /> B. Or calculated:GPM=Change in Depth(in)x Gallons Per Inch(Line 1 or 2)/Time Interval in Minutes �lusted after field <br /> � � � � � measurement& <br /> in X gal/in� min= GPM calculotion. <br /> 14. Choose a Flow Rate from Line 13.A or 13.6 above. � GPM <br /> 15. Calculate TIAAER ON setting: <br /> Tota(Dosing Vo(ume(Line 11)IGPM(Line 14) <br /> ��dl =�8Pm -�Minutes ON <br /> 16. Calcutate TIAAER OFF setting: <br /> Minutes Per Day(1440)/Doses Per Day(Line 9)- Minutes On(Line 15) <br /> 1440 min .- �doses/day - �min = �Minutes OFF <br /> 17. Pump Off Float-Measuring from bottom of tank: <br /> Distance to set Pump Off Float=Gallons to Cover Pump(Line 5)l Gallons Per Inch(Line 1 or 1): <br /> ��al :��dl/ifl = �Inches <br /> 18. Alarm Ftoat-Measuring from bottom of tank: <br /> Distance to set Alarm Float=Tank Depth(4A)X 90Y of Tank Depth <br /> � in X 0.90= �in <br /> B. DEMAND DOSE FLOAT SETTINGS <br /> 18. Calculate Floot Seporation Distance using Dosing Volume. <br /> Tota!Dosing Volume(Line 12)/Gallons Per Inch(Line 1) <br /> 184 gal = 25.3 gal/in= 7.3 Inches <br /> 19• Measuring from bottom of tank: <br /> A. Distance to set Pump Ofj Float=Pump Heighi +Block Height (Line 5)+Alarm Depth (Line 12) <br /> 14 in + � in = 17 Inches <br /> B. Distance to set Pump On Float=Distonce to Set Pump-Off Float(Line 19.A)+Float Seporation Distance(Line 18) <br /> 17 in + 7.3 in = 24 Inches <br /> C. Distance to set Alarm Floa[ =Distance to set Pump-On Float (19.8)+Alarm Depth (2-3 inches) <br /> 24 in + 3.0 in = 27 Inches <br /> FLOAT SETfINGS <br /> DEMAND DOSING TIMED DOSING <br /> Alarm Depth 27 in Alarm Depth in <br /> Pump On 24 in 76 Gal <br /> Pump Off 17 in �84�� Pump Off �� <br /> 429.25 Gal <br />