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18 Paul W. Donoho, R.E.H.S. #6227 (530) 701-9972 AdvanTelle 01 "7'MMANUAL COMMERCIAL TREATMENT SYSTEMS Inspection ' • • - • 2.Drawdown We Perform a drawdown test to set the pump flow Inspection Points— rate in the control panel. System Timer Settings a.Measure and record the distance from the top of the tank to the liquid level in the tank. 1.Recite Timer Settings:The method for calculating Recirculation/ h.Toggle the pump"AUTO-OFF-MAN"switch to the"MAN"position Blend Tank timer settings is pmvided below.Newer AXI 00 panels for sixty seconds. have the ability to adjust the timer setting based on actual flow data.See the instructions included with the control panel for setting c.Toggle the pump"AUTO-OFF-MAN"switch to the"OFF"position; information. then measure and compare the difference in elevations.The . Pump On Time=1.5 Minutes difference in elevation in inches or millimeters,multiplied by the gallons per inch or liters per millimeter of the tank or basin will NOTE:The standard Pump On Time forAX100 units is 1.5 provide the correct flow rate in gallons per minute(gpm)or liters minutes.Your system's needs may differ.Consult yoursite per minute(Limin).Follow the instructions provided with the control plans,engineer/designer,ofOfenco for more details. panel for entering the measured pump flow rate. • Pump Off time=(1440-Cycles per Day)-Pump On Time NOTE:This method will not work on recircufatiarUblend tanks if the flow is returning to the tank through the retire valve or for Calculate Cycles per pay using the equation below: dose tanks with transport lines thatdrain back (Average Daily Flow)x(Recirc Ratio) 3.Automatic pump operation:Test the system using the floats to (Pump Flow Rate)x{Pumps per Dose)x(Pump On Time) drive pump operation. Demand dose: NOTES: -1440 is the number of available minutes in a 24-hourperiod. a.Toggle the"AUTO-OFF-MAN'switch to the"AUTO"position. The standard Recirc Ratio forAX160 units is 4 but it can b.Unclip the float assembly and remove it from the tank if it is not range from 2 to 6,depending on the needs of the system. out already. The Pump Flow Rate is 48 gallons per minute(31/sec)when Houle pressure measures 3.D psi(20.6 kPa). G,Verify the automatic operation of the pumps by incrementally 2.Discharge Timer Settings lifting the floats to simulate normal raising and lowering of the 9s(fimed Doge Systems):The timer tank liquid level.The pumps should cycle on when you lift them settings for no system are calculated based on the actual and and cycle off when you release them.On duplex systems,the expected ftow.Equations are provided below. pumps should alternate between lead and lag pumps and cycle a.identify Dose Volume off when the floats are dropped. • Dose Volume=Number of gallons desired per dose NOTE:An On/Or Boat wodcs drffemnW than a pair of"Wand or "Off"fioais Verify the type of floats in your system before testing. • Dose Volume=(Number of Orifices)x(Loading Rate per Orifice) d.Lower the float assembly into the tank and clip the float b.Identify Doses per Day assembly into the float bracket. • Number of doses per day=(Design Flow):(Dose Volume) • limed dose: c.Identify Time Interval Between Starts,in hours a.Toggle the"AUTO-OFF-MAN"switch to the°AUTO"position. • Time Interval Between Starts=(Hours per Day)�(Doses per Day I b,Record the timer settings,then reduce the timer settings to 0.5 d.ldentlyTime On,in minutes minutes"OFF,"0.5 minutes"ON,"and 1.0 minutes"OVR OFF." .Time On=(Dose Volume)-(Measured Pump gpm) c.Let the pump run through several cycles to confirm that the timers are operating correctly. d.Change the timer settings back to the settings specified by the engineer. N[M-OM-AT7r-9,Rev.2.1,45/15 •�Copyright Drenco Systems®,Inc.Property of Oreoco Systems®,€nC•Do not reproduce or distrlbu#e wNrout wtigen authorization from Orenw�80p-3h8-9843