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0 •F .. <br /> DUPLEX PUMP CONTROL PANEL - pg 2 <br /> 9. DUPLEXOR Level Control System -Intrinsically Safe Low Voltage-5 volt DC operation <br /> The level control system shall be a 12 pin,plug-in, field replaceable solid-state device. The DUPLEXOR <br /> shall ALTERNATE PUMPS and include (2) H-O-A(Hand-Off-Automatic) switches, LED indicating lights <br /> for each pump and 4 float switches. The DUPLEXOR shall have a lead-lag alternator selector switch and <br /> alternator test switch. <br /> The DUPLEXOR is an intrinsically safe level control system provided to start, stop and alternate pumps in <br /> response to the wet well liquid level. On a falling liquid level,the lowest float switch(FSI-PUMP OFF) <br /> shall close, locking the pumps into a common"pumps off'. As the liquid level rises,the second float switch <br /> (FS2-PUMP ON) shall close at the "lead pump on"level. The controller will automatically alternate and <br /> select the lead pump. Should the liquid level continue to rise faster than one pump can handle,the third float <br /> switch(FS3-LAG/BOTH PUMP ON) shall close at the "lag pump on"level starting the lag pump. As the <br /> pumps run, lowering the liquid level,the sensor switches shall open in reverse order. The fourth float switch <br /> (FS4-HIGH WATER ALARM) shall activate only if the liquid level continues to rise, causing both the <br /> audible alarm and the light(visual) alarms to activate. <br /> The duplexor shall provide for time delay starting of the lag pump-preventing both pumps from starting at <br /> the exact same time. This feature prevents an amp rush that could cause a nuisance trip. <br /> In the event of a float switch failure-the DUPLEXOR shall provide operation to keep the pump station from <br /> overflowing by operating on any (2)float switches. <br /> 10. Battery Back Up (BBU) (OPTIONAL)-iVwhen required by local DEP or regulatory agency .. <br /> A 12-volt Battery Operated Alarm Charging(BOAC) system will activate when there is a power outage to <br /> the panel. During normal operation the BOAC system maintains a charge on the 12-volt battery. In a power <br /> outage,the battery operates a strobe light and horn signal for up to 24 hours. The alarm silence button will <br /> silence the horn and the strobe light shall stay on until the power is restored. <br /> 11. Miscellaneous <br /> Weatherproof schematic wiring diagram shall be permanently affixed to enclosure door. Terminal blocks <br /> shall be located far enough away from the enclosure side(s)to permit convenient connection of incoming <br /> wires per N.E.C. code. <br /> F/FS/TSCV/ST/38DFGPane1 <br /> Rev 7/04 pg2 <br />