The Elevator Sump Oil Alarm System uses a Patented Duel Probe Capacitance Switch to differentiate between water and oil. Sensing is accomplished by measuring the dielectric of the medium at the sensor.

The controller is solid state with a NEMA 4x enclosure rating which allows it to be mounted in the elevator pit. The controller is equipped with a high liquid audible alarm and available with a dry N. O. or N. C. contact for remote monitoring. Controller is UL listed #508A Type L, File #E187669.

The system has a choice of two effluent pumps, 1/3 HP and 1/2 HP. Pump size is dependent on the head ft. required for each application. Pumps are oil filled hermetically sealed, automatic reset and thermal overload protected. Both pumps have 1-1/2" NPT discharge. Pumps are UL listed #778 and CSA #108.

The system is completely assembled and pre-calibrated prior to shipping. Check valve and mounting hardware for controller is included for fast and easy installation.

Sequence of operation: The pump control relay and the capacitance probe will act in concert to allow water to be pumped from the sump pit but will not allow oil to be pumped.

Sump Pit: Any standard sump basin with a minimum diameter of 16" and a minimum depth of 18" can be used, 24" deep is ideal. If the sump pit is poured in place it should be a minimum of 16" x 16" - 18" - 24" deep to a maximum of 24" x 24" - 18" - 24" deep.

1. Under normal conditions (water in sump pit) the pump relay will initiate the pump to turn on when the water level rises to approximately 9"; it will pump until the water level lowers to approximately 3"

2. If the liquid in the sump pit rises to approximately 9" and senses oil, the controller will go into alarm and the pump will not run. If oil or water rises to approximately 12", the high oil/water float switch will initiate a high oil/water condition, and an audible alarm will sound until the level has lowered to a safe condition. The high oil/water float condition can be monitored in a remote location with the optional dry N. O. or N. C. contact.