| 1) |
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| Pump goes on with water in contact with sensor probe. |
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| 2) |
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| Pump continues to pump down water. |
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| 3) |
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Pump will continue to run, pumping water only until 1) water level drops below tip of sensor probe or 2) only oil is in contact with sensor probe, eliminating electrical conductivity.
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| 4) |
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| Pump shuts off before oil is pumped, leaving approximately 3" of liquid in bottom of sump. |
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| 5) |
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Sump floods with oil, sensor probe overrides pump switch and pump remains off. (Oil is contained.)
If the water level in the elevator pit increases, the oil (which is lighter than water) will rise above the oilsensing probe and allow the pump to function in the normal manner until the water is pumped down and oil, once again, comes into contact with the probe.
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