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water level will reach the third stage <br /> of the Kari float switch which energ- <br /> izes the alarm. <br /> 4 . If both pumps operate correctly, the <br /> wastewater level in the equal. tank <br /> will drop to the bottom and the Kari <br /> float switch de-energizes. <br /> NOTES: <br /> The first/Second stage of the Kari <br /> float switch energizes one of the <br /> self priming centrifugal pump from the <br /> equalization tank. It also energizes the <br /> following components: <br /> 1. 2-way air solenoid valve to operate <br /> the caustic circulation pump. <br /> 2 . All 3-way solenoid valves to operate <br /> the caustic feeding valves. <br /> 3 . All acid metering pumps. <br /> 2 . 3 Maintenance Route Frequency: Weekly <br /> - Inspect the tank for leaks and damage. <br /> Clean the tank if necessary. <br /> - Inspect the foot valves, self priming <br /> centrifugal pumps, and true union ball <br /> valves for leaks, damage, and clogs. <br /> - Inspect the Kari float switch for the <br /> obstruction of float. <br /> 2 .4 Troubleshooting Symptoms/Causes <br /> ------------------------------------------------------------------ <br /> Symptom Typical Causes <br /> ------------------------------------------------------------------ <br /> EQUALIZATION TANK OVERFLOWS <br /> Alarm is "ON" , self 1. Make sure both equal. pumps' switches <br /> priming centrifugal on the electrical panel is in the <br /> pump operates but no "OFF" position. Inspect and clean the <br /> or low liquid flow. basket strainers and foot valves for <br /> clogs. Replace the basket strainers <br /> and foot valves if necessary. Fill the <br /> pump with a clean liquid and try <br /> priming again. <br /> 2 . If the pump is not operating OK, check <br /> for air leaks in the foot valves, pump <br /> housings and piping systems. <br /> 3 . If there are no air leaks, replace the <br /> pump for repair. <br />