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LIT T LlT TANK LEVEL PLC -2 Al -001 (4-20mADC) MODES OF OPERATION Operator will select mode of operation from WTP (F) HMl/0/D. "EX/ST/NG MODE' using existing booster pumps, through hydropneumatic tank. "NEW MODE' using four new booster pumps, with a lead, lag, lag -1:g configuration, including a stand-by. PUMP AUTO SEQUENCE LOG/C: 1 The pump auto sequencer control logic shall control the starting sequence of the three (N) booster pumps. The three pumps shall be alternated as to which pump is lead, lag, or lag -lag for each pumping cycle. PLC -2 DI -003/011/019I Note: A pumping cycle is defined as completed when al/ pumps are off. Pumps whose HOA switcl 3s ore NOT in Auto' shall be considered by the sequencer logic as unavailable and shall NOT be given a sequence assignment. A r E BOOST, U�U V PLC -2 Dl- HE BOOSTER I I PLC -2 D1-001 T PLC -2 DI -025 PLC -2 D1-028 D1-029 PLC -2 D1-030 PLC -2 FE. 17 e e jch ciar& INC. 6060 Sunrise Vista, #3450 Citrus Heights, ca 95610 'dllrn' M1 T AND Wei OPERA TING MODE (E) BOOSTER PUMP #1 START ! ' 0. EX/ST/NG MODE A AND RUN E BOOSTER PUMP 1 DOX-002 1 q , (E) BOOSTER PUMP #1 HOA 1N AUTO' PLC -2 DO -002 T Clearwell Level Transmitter (Bubbler System) provides a call to run the well when clearwe!l level drops to 3.2' and PLC -2 DI -002 shuts off well at 4.5' (wet well is N 6' deep). Clearwell level is displayed on O!D and run call to well comes from (E) BOOSTER PUMP #1 well pump on and off setpoints in the PLC. The PLC also has high clearwell level alarm at 4.8' c:id low clearwefl level alarm at 3.1 '. High clearwell level also blocks well run and /ow clearwell leve/ blocks run of (E) booster pumps. Well pump run is interlocked to run blower whenever well is called to run. Sodium Hex Pump is interlocked to run whenever well pump is called to run. (E) Booster pumps are called to run from system pressure switches via the PLC, which shall alternate each (E) M 1 E BOOSTER PUMP 7f2 RUNNING booster pump as to lead and lag for each pumping cycle (lead 'on' at 40 psi and 'off' at 60 p.i lag 'on' at 30 T PLC -2 D1-011NOT AND T.D. E BOOSTER PUMP 12 psi and 'off' at 50 psi). Low pressure alarm is less than 30 psi. 90 SEC. FAIL TO RUN High pressure alarm is greater than 60 psi. chlorine injection system is interlocked to run whene ler either booster (E) BOOSTER PUMP 12 START RUN E BOOSTER PUMP L2 pump runs. The control system for the hydropneumatic tank with its pressure switch is self-contained at the �A (E) BOOSTER PUMP #2 HOA IN AUTO' AND PLC -2 DO -003 + DOX-003T hydropneumatic tank. PLC -2 D1-010 (E) BOOSTER PUMP 12 NEW MODE WELL SITE CONTROL LOGIC The PLC shall read the level transmitter, measuring static air pressure in the bubbler tube. The C.-Jarwell Level Transmitter (Bubbler System) shall provide a call to run the well when clearwell level drops to 3.2' and shall shut off well at 4.5' (wet well is - 6' deep). Clearwell leve/ shall be displayed on OID. The PLC also sho : incorporate high clearwell level 4.8' and low clearwell level 3.1' alarms. High c/earwe# level shall also block well r. -n and /ow clearwell M 1WELL PUMP RUNNING leve/ shall block run of booster pumps. Well pump run is interlocked to run blower whenever welt' is called to run. T PLC -2 D/-019 NOT TD, WELL PUMP Sodium Hex Pump is interlocked to run whenever well pump is called to run. AND 90 SEC. FAIL TO RUN The well pump control logic shall also incorporate operation of the existing three way solenoid purge valve. The WELL PUMP START control logic shall operate the solenoid for six seconds every hour, isolating the level transmitter -nd purging the air �A WELL PUMP HDA /N 'AUTO' AND pLCl-2 DOP 001 + DOX-001 T WELL PUMP tube, manual 6 -second duration purge shall also be selectable through the 0/D. PLC -2 D1-018 (EJ BOOSTER PWC (N) STORAGE TANK CONTROL The (N) storage tank leve/ tranmitter (LIT1) value shall be monitored by the PLC. The PLC shall call the lead (E) booster pump at a tank level of 23.5ft and call the lag (E) booster (N) pump at 23.Oft. On rising level, the lag pump shall shutoff at 25.5ft and the lead pump shall shutoff at 27.75ft. The PLC shall o/arm, or a LO -LO level of 22.5ft and H1_H/ level of 28.5ft. Low distribution pressure alarm is less then 30 psi and Hl distribution pressure is greater then 60 psi. (E) MP E CHLORINE METERING PUMP RUN COMMAND + DOX-006 T (E) Chlorine injection system is interlocked to run whenever either (E) booster pump runs. DO -006 PUMP INTERLOCKS (TYP. ALL PUMPS) SHUTDOWN PUMPS AND DESELECT PUMPS FROM AUTO SEQUENCER (IF APPROPRIATE) ON.• -'Pump NOT ready' -'HOA switch NOT in Auto' -'Pump motor high temperature shutdown' -'Pump high discharge pressure' STATUS POINT (DISPLAY AT Q HMI) (The following status point are typ. for all pumps) -Pump ready / Not ready -Pump HOA switch position HAND / AUTO -Current operating sequence for each pump TRENDS AND GRAPHS (DISPLAY AT O/D, HMI) (Display al/ analog values, and set -points with data archiving) ANALOG VALUES (DISPLAY AT 0/D/HMI) (Display levels(in borgroph) and all other analog values, and set -points) COMPUTED VALUES (DISPLAY AT 0/D/HMl) -Pump run time for al/ pumps CONTINUED TO PG E24 WELL SITE DOX-005 T METERING PUMP v BLOWER RUN - + DOX-004 T DO -004 BLOWER ETHERNET OID PUMP FAIL TO START BUBBLER PURGE VALVE OPERATE -� DOX-015T nn%,c; BUBBLER PURGE VALVE (E) MP2 COPYRIGHT 225 NORTHSTAR ENGINEERING GROUP, INC 1 • • 0 W 0 a a a W a O N z 0 N N z 0 a Fr U N W D 0 z t}— t� Q W z WO IL _ he Q aLUU H U_ O J I- U y � O U z O or O _ Q filly� a JOB DATE: 03 08 07 SCALE: DRAWN: K.T. DESIGN: M.B. CHK D: M. B. SHEET NUMBER E23 OF 47