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7a pN adlu3 fn'rlr.i To{loacu(ah[� <br /> {ent TIt• /pnL <br /> si7 wjcmdi/Im.rn <br /> chv n9r Fow srnser <br /> oulpul b s •LomA ' <br /> ��\ rblyrnCr' <br /> \ �^ MfICnM fuiw� <br /> J <br /> ConFvr rc I'i!y Walrr �rm <br /> *fnk 541,Fn <br /> " sselkh <br /> ZA,&,d)P Wher' (AIIA <br /> Prounser <br /> Z6l9 Polymrr ZC4� poly rr <br /> hrnK lank- <br /> FIGURE 3-7 POLYMER FEED OPERATION <br /> 3 . 5 POLYMER FEED When wastewater reaches the top of the <br /> OPERATION clarifier tank and flows out to the <br /> city, the paddle wheel flosensor sends a <br /> signal to the signal conditioner; the <br /> signal conditioner changes the flow <br /> sensor output to the current range from <br /> 4 - 20mA; both polymer metering pumps <br /> use the current 4 - 20 mA signal to <br /> operate. <br /> -2839 polymer will feed pH adjustment <br /> tank 2. <br /> -2844 polymer will feed the <br /> flocculation tank. <br /> Both Kari float switch' s in the polymer <br /> tanks will send a signal to energize <br /> the alarm to warn the operator that the <br /> tank needs to be refilled. <br /> 15 <br />