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FISite Preparation and allation Instructions TLS -350 UST Monitoriystem 2. Remove the 4 -inch PVC cap from the monitoring well. -211 WARNING: DO NOT PERFORM DRILLING AND TAPPING PROCEDURES IN A HAZARD- OUS AREA. DRILLING AND TAPPING CAN CAUSE SPARKS AND IGNITE VOLATILE FUMES AND LIQUIDS FOUND IN A CLASS I, GROUP D HAZARDOUS LOCATION. FAILURE TO COMPLY COULD RESULT IN DEATH, SE- RIOUS PERSONAL INJURY, PROPERTY LOSS AND EQUIPMENT DAMAGE. 3. Drill (0.703" dia.) and tap a 1/2 x 14 NPT pipe thread through the top of the cap. 4. Thread the furnished cord grip into the cap. 5. Pass the sensor cable up through the cord grip from the inside of the cap until the sensor tip hangs at a point that is 12 inches above the highest level to which the water table normally rises. If this level is not known, position the sensor tip 12 inches above the bottom of the monitor- ing well or 12 inches above any water in the well. Tighten the cord grip to ensure a water -tight cable entry. (See Figure 56, `apical Vapor Sensor Installation.") NOTE: If the water table rises and immerses the sensor causing a water alarm, loosen the cord grip and reposition the sensor to hand (the higher of) 12 inches above the new water level or 12 inches above its previous position. 6. Measure the cable length required to reach the sensor junction box and trim the cable accordingly. Figure 56. Typical Vapor Sensor Installation. 36 0 7. Install the furnished junction box cord grip in one of the threaded junction box access holes. 8. Pass the sensor cable through the cord grip into the junction box. Tighten the cord grip to ensure a water- tight seal at the cable entry. 9. Using wire nuts, connect the three sensor wires to field wires in the junction box (see Figure 57, "Three -Wire Vapor Sensor Field Wiring Diagram"). Be sure to ob- serve color codes or wire markings to ensure proper polarity hookup to the Vapor Sensor Module connector in the TLS -350 monitor. WEATHERPROOF JUNCTION BOX 1/2" RIGID (1 PER SENSOR) CONDUIT VAPOR BLACK • TO GROUND• GREEN VAPOR MONITOR SENSOR WATER • WHITE Figure 57. Three -Wire Vapor Sensor Field Wiring Diagrams. 10. Seal wire nuts with epoxy sealant using one bag for two wire nut connections and another bag for the third wire • nut connection. (See Figure 58, "Epoxy Sealant for Three -Wire Connections.") Figure 58. Epoxy Sealant for Three -Wire Connections. CAUTION: IF MORE THAN TWO WIRE NUT CONNECTIONS SHARE AN EPDXY SEALANT • BAG, THE CONNECTIONS WILL NOT BE PROP- ERLY SEALED. IMPROPER SEALING OF THE CONNECTIONS WILL RESULT IN INACCURATE SENSOR READINGS AND POSSIBLY FALSE ALARM CONDITIONS. 14" MINIMUM DIA MANHOLE 2 CORD GRIP SEALS SUPPLIED WITH SENSOR WEATHERPROOF • �'!` JUNCTION BOX WITH �••-0 112 INCH NPT THDS. (16 CUBIC INCH MINIMUM) EPDXY SEAL PER NFPA SPEC. TO PROBE JUNCTION BOX PERFORATED PVC MONITORING WELL HOUSING Figure 56. Typical Vapor Sensor Installation. 36 0 7. Install the furnished junction box cord grip in one of the threaded junction box access holes. 8. Pass the sensor cable through the cord grip into the junction box. Tighten the cord grip to ensure a water- tight seal at the cable entry. 9. Using wire nuts, connect the three sensor wires to field wires in the junction box (see Figure 57, "Three -Wire Vapor Sensor Field Wiring Diagram"). Be sure to ob- serve color codes or wire markings to ensure proper polarity hookup to the Vapor Sensor Module connector in the TLS -350 monitor. WEATHERPROOF JUNCTION BOX 1/2" RIGID (1 PER SENSOR) CONDUIT VAPOR BLACK • TO GROUND• GREEN VAPOR MONITOR SENSOR WATER • WHITE Figure 57. Three -Wire Vapor Sensor Field Wiring Diagrams. 10. Seal wire nuts with epoxy sealant using one bag for two wire nut connections and another bag for the third wire • nut connection. (See Figure 58, "Epoxy Sealant for Three -Wire Connections.") Figure 58. Epoxy Sealant for Three -Wire Connections. CAUTION: IF MORE THAN TWO WIRE NUT CONNECTIONS SHARE AN EPDXY SEALANT • BAG, THE CONNECTIONS WILL NOT BE PROP- ERLY SEALED. IMPROPER SEALING OF THE CONNECTIONS WILL RESULT IN INACCURATE SENSOR READINGS AND POSSIBLY FALSE ALARM CONDITIONS.