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 5 pumps: 1/2 HP (ESA 50/100), 3/4 HP (ESA 75/100), 1HP (ESA 100/100), 1/2 HP (ESA 50/100HF) and 1HP (ESA 100/100HF). Pump size is dependent on the head ft. required for each application. The (ESA 50/100HF)is designed for (2) elevators (duplex) in the same shaft. It will pump 6,000 GPH at 15 head feet. The ESA 100/100HF is designed for (3) elevators (triplex) in the same shaft. It will pump 9,000 GPH at 15 head feet or (2) elevators (duplex) with 15’+ to 25′ head feet.
ASME A17.1-2007 code 2.2.2.5 states “In elevators provided with Firefighters’ Emergency Operation, a drain or sump pump shall be provided. The sump pump/drain shall have the capacity to remove a minimum of 11.4m3/h (3000gal/h) per elevator”.
How to choose the correct system
Total head feet of up to 12′ use ESA 50/100, total head feet over 12+’ to 21′ use ESA 75/100 and for total head feet over 21+’ to 30′ use ESA 100/100.
For (2) elevators (duplex) in the same shaft use ESA 50/100HF with up to 15 head feet.
For (3) elevators (triplex) in the same shaft use ESA 100/100HF with up to 15 head feet or (2) elevators (duplex) with 15’+ to 25′ head feet.
Pumps are oil filled, hermetically sealed, automatic reset and thermal overload protected. Pumps are UL listed #778 and CSA #108.
The system is completely assembled, pre-calibrated and tested 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 (All Systems Except ESA 50/100HF and ESA 100/100HF)
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 24″ x 24″- 24″ deep.
Sump Pit (ESA 50/100HF and ESA 100/100HF)
Minimum diameter of 18″ and a minimum depth of 24″ can be used, Ideal size is 24″ x 24″ – 24″ deep if poured in place.
Operation (All Systems Except ESA 50/100HF)
- Under normal conditions (water in sump pit) the pump relay will initiate the pump to turn on when the water level rises to approximately 8″; it will pump until the water level lowers to approximately 4″.
- If the liquid in the sump pit rises to approximately 8″ 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.
Operation (ESA 50/100HF and ESA 100/100HF)
- Under normal conditions (water in sump pit) the pump relay will initiate the pump to turn on when the water level rises to approximately 14″; it will pump until the water level lowers to approximately 10″.
- If the liquid in the sump pit rises to approximately 14″ and senses oil, the controller will go into alarm and the pump will not run. If oil or water rises to approximately 18″, 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.