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F4Site Preparation and Installation Instructions EIS -350 UST Monitoring System SECTION 5. INTERSTITIAL LIQUID SENSOR INSTALLATION A. EQUIPMENT PREPARATION. WWARNING: TO AVOID ELECTRICAL SHOCK WHICH COULD KILL YOU, BE SURE AC POWER TO THE MONITOR IS OFF DURING INSTALLATIOM 1. Turn OFF power to the ILS -350 system. ,j NOTE: Do not install the sensor if any liquid is present in the annular space. Failure to comply will lead to an alarm. 2. Make sure no liquid is present in the annular space. B. INSTALLATION OF FLOAT SWITCH — STEEL TANKS. 1. To be sure the sensor will reach the bottom of the annular space, first measure the sensor riser pipe from the bottom of the pipe to the top. Then measure the same distance up the leader cable from its connection to the sensing element and mark the leader cable. 16 CAUTION: DO NOT USE A KNIFE OR OTHER SHARP OBJECT TO MARK THE LEADER CABLE. MARK THE DISTANCE WITH A MARKER, TAPE, ORA TWIST TIE. 2. Lower the float switch assembly into the riser pipe until the float switch touches the bottom of the tank (see Figure 12 "Float Switch Installation _ Steel Tanks"). 3. Keeping the cable taut, secure the sensor assembly in place by attaching the cord grip. NOTE: The float switch assembly must not hang by the cable, but should rest slightly on the bottom of the tank T supported by the cable. 4. Secure the riser cap to the riser pipe. 5. Tighten the cable bushing nuts on the riser cap and junc- tion box to ensure a water -tight seal at the cable entry. 6. Using wire nuts, connect the two -wire sensor cable to the field wires in the sensor junction box (see Figure 13 "Two - Wire Sensor Field Wiring Diagram"). Since these are contact switches, polarity is not a consideration when connecting sensor wires to field wires. ,I NOTE: SEAL WIRE NUT CONNECTIONS AT THIS qTIME USING epoxy sealant, furnished with each sensor. WARNING: EPDXY SEALANT MAY BE IRRITAT- ING TO EYES AND SKIN. MAY CAUSE SKIN SENSITIZATION IN SUSCEPTIBLE INDIVII)U- ALS. MAY BE ABSORBED THROUGH THE SKIN. EPDXY SEALANT CONTAINS EPDXY RESIN AND VINYL CYCLOHEXENE DIOXIDE. VINYL CYCLOHEXENE DIOXIDE HAS CAUSED SKIN CANCER IN ANIMAL TESTS. PRECAUTIONS: AVOID EYE AND SKIN CON- TACT. WEARIMPERVIOUS GLOVES AND SAFE- TY GLASSES. USE ONLY IN WELL VENTILATED AREAS. 12 Figure 12. Float Switch Installation — Steel'iAnks. i r WEATHERPROOF JUNCTION BOX (1 PER PROBE) 1/2" RIGID CONDUIT y BIk TO To SENSOR !MONITOR • + vr,c Figure 13. Two -Wire Sensor Field Wiring Diagram. M M