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-,;)► Continuous Line Ie#Monitoring - Automatic Ale Repress urization The ISM-4080 and ISM-4081 automatically monitor Vmi mechanical line leak detectors. After an authorization is received, the leak detector must open before dispensing begins or the submersible is shut down. Between dispensing cycles, the ISM continuously monitors the line pressure.A line test/auto repressurization sequence is initiated every time line pressure falls below 12 PSI. The test (when passed) additionally recharges the delivery system, combating thermal contraction, keeping the line pressurized and ready for fuel delivery. Long pipe runs and flexible pipe systems are automatically compensated for, while preventing false alarms. No New Wires to the Submersible Pump Sump Containment The ISM-4080 and ISM-4081 modules monitor the Leak Detector Sensor(piston switch).The Leak Detector Sensor Housing is screwed into the Vmf 99 Series-99 LD-2000 or 99 LD-3000 mechanical line leak detector vent opening. An alternative vent is provided in the sensor housing. Only a single pair of wires is needed to monitor and discriminate between the Leak Detector Sensor and an (optional) single point, normally closed, intrinsically safe sump sensor. If a sump sensor has been previously installed in the sump, no new wire need be pulled for the installation of the ISM-4080. On new installations, separate wiring may be installed for both the sump sensor and the Leak Detector Sensor. With separate wiring to the sump sensor and the Leak Detector Sensor,the ISM-4081 may be programmed to actuate an alarm only or provide shutdown of the submersible during sump sensor activation. qA Manifolded Submersible Control Multiple submersibles into one line, all starting at the same time, overcome catastrophic line leak detection function. The installation of an ISM module (and piston sensor) allow multiple submersibles feeding into a single delivery line to be wired in such a manner to enable hourly catastrophic (3 GPH @ 10 PSI) testing. This is an inexpensive fix to a common problem. Line Leak Monitoring Reports Through Automatic Site Monitoring Equipment Auxiliary Sensor Inputs Low Pressure Alarms and Sump Alarms (optional) are detected and displayed on the ISM Module.Alarm reports may be monitored through the ISM only, or connected in parallel to a Site Monitoring System to provide for the remote reporting of alarms.Additionally,the alarm output contacts may be used with stand-alone audible or visual devices. Wiring diagrams are provided in the ISM Installation and Operation Manual. No Interference with Automatic Tank Testing If tank monitoring (testing) equipment needs specific "quiet" times to perform testing, the ISM will provide uninterrupted test time, based upon time of day (programming set-up)or based on an AC or DC input signal from the site tank test equipment. Works with Vml "99" Series Mechanical Line Leak Detectors To allow ISM monitoring of the 99 LD-2000 Line Leak Detector,the ISM-4101 Le k D r Sensor/Housing is uired for retrofit and new installations. To allow ISM monitoring of the 99 LD-3000 Line Leak Detector, the ISM-4102 eak Detector Sensorl Housing is required for retrofit and new installations. 4 1/8' 1(105mm)� z� Z' mm L Q OUR i� T.a 6 3/8" DISPLAY 3 1/2' (162 mm) (89mm) OD y RSTO we ZZ0000 ie DIN RAIL RELEASE 4' (101 mm) 2 114' ODDODD ❑O 00 ❑ODDOD (57mm)