SU0003122 - Laserfiche WebLink

Home Browse Search

F. TROUBLESHOOTING PROCEDURES PUMP SERVICING PROCEDURE A pump may become fouled with string, hair or rubber, causing noise and vibration. In +- case a pump becomes inoperative, it should be removed from position and serviced as follows: 1. Switch power off by breaker and disconnect electrical leads at terminal board. 2. Lift pump assembly out of tank. 3. Move pump to floor. 4. Remove bottom of pump casing and inspect to determine whether any foreign object has jammed the impeller or plugged the pump. �- 5. Remove any string, hair or other material which may be wrapped around the impeller. 6. Replace bottom pump casing. 7. Test pump as follows: a. Reconnect heads at terminal board. b. Turn switch controlling pump operation. c. Turn power back on by circuit breaker. 8. If pump runs satisfactorily, turn power off again and replace pump in system. 9. Reset breaker to power-on position and individually turn on all pumps to be sure they are operating satisfactorily. 10. If pump does not run when tested, replace it with a spare pump and repeat steps 8 i- and 9 above. 11. Return inoperative pump to factory or authorized service deafer for repair. ` SLUDGE REMOVAL In case of heavy solids buildup within the system, it is normally possible to break them down by the stabilizing process described in section C. However, if the system is full and input cannot be restricted for a period of time while stabilization is taking place, it may be necessary, as a temporary expedient, to remove some sludge from the system. Sludge removal, if required, can be accomplished in the following manner: 1. Process a batch through the clarifier chamber in a normal time-controlled cycle. 2. When supernatant transfer pump starts operation, visually observe condition of liquor as it is entering the chlorine contact chamber. 3. If liquor entering chlorine contact chamber is normal, allow supernatant transfer pump to finish normal time-controlled cycle. No sludge removal is required. 4. If liquor entering chlorine contact chamber is turbid, manually place the Hand, Off, Auto (HOA) switch in the OFF position. This will override the PC, turn off the pump, 'r and prevent the rest of the batch pumps from operating automatically. 5. Open sludge waste valve and close sludge return valve back to aeration chamber. �- 6. Connect a flexible hose to elbow of sludge return line directing it to a drum or tank truck for disposal. 8 r..