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Site Preparation 3 Installation Instructions TLS-350 UST Monitoring System I "'� 6. Carefully lower probe into the riser pipe until the boot PRECAUTIONS:AVOID EYE AND SKIN CON- rests on the bottom of the tank. TACT. WEAR IMPERVIOUS GLOVES AND CAUTION: DO NOT ALLOW PROBE TO SAFETY GLASSES.USE ONLY IN WELL VEN- FREEFALL AND/OR SHARPLY IMPACT THE TILATED AREAS. BOTTOM OF THE TANK SHOCKTO THE PROBE 10. Tighten the cable bushing nuts on the probe riser cap FOOT WILL RESULT IN SEVERE PROBE DAM- and junction box to ensure a water-tight seal at the AGE. probe cable entry. 7. Feed the two-wire probe cable up through the riser pipe 11. Secure the riser locking cap to the top of the riser pipe. cap bushing and in through the junction box bushing. A padlock may be installed for added security. Leave enough slack in the cable between the cap and junction box to allow the cap to easily reach the riser F. PROBE INSTALLATION IN ABOVEGROUND pipe. In addition,leave enough slack under the riser STORAGE TANKS cap to allow the probe to rest on the bottom of the tank. Install each probe in an aboveground storage tank as 8. Using wiring nuts, connect the wires from the probe follows(see Figure 39;"Magnetostrictive Probe Installa- cable to the probe field wires in the junction box (see tion Requirements for Aboveground Storage Tanks"): Figure 38).Be sure to observe proper polarity between the probe and monitor wiring during installation.The WARNING:TO AVOID ELECTRICAL SHOCK conduit must be properly sealed in accordance with the 15WHICH COULD KILL YOU, BE SURE AC National Electrical Code(NFPA 70)and the Automo- POWER TO THE MONITOR IS OFF DURING tive and Marine Service Station Code (NFPA 30A) INSTALLATION. since they pass from a Class I,Division I or Division II area into a non-hazardous area. 1. Turn OFF power to the TLS system. 2. Make sure any liquid other than the product to be dispensed has been pumped out of the tank. WEATHERPROOF JUNCTION BOX 3. Be sure there is no sludge in the bottom of the tank. titRIGD t PER PROBE) Sludge can interfere with proper operation of the water " CONDUIIT = Bilk float. • T O F R O M STRAIGHT LIOUIDTIGHT CONNECTORS vC MONITOR PROBE (SUPPLIED WITH AST KIT) WEATHERPROOF • JUNCTION BOX WITH '/,INCH NPT THDS WhitI/, CUBIC INCH MINIMUM) EPOXV SEAL PER NFPA SPEC RISER DIMENSION Figure 38. Two-Wire Probe Field Wiring Installation SHOULD BE IS MIN TO THE BOTTOM OF FLEXIBLE METAL CONDUIT Diagram. THE RISER CAP SUPPLIED WITH AST KIT SEE NOTE BELOW 9. Seal wire nuts with epoxy sealant furnished with each d H API PIPE SCHEDULE dO probe, using one bag for two wire nut connections. (Refer to Figure 26, "Epoxy Sealant for Two-Wire Connections.") CAUTION: IF MORE THAN TWO WIRE NUT TANK MAGNETOSTRICTIVE CONNECTIONS SHARE AN EPDXY SEALANT PROBE BAG, THE CONNECTIONS WILL RESULT IN INACCURATE PROBE READINGS AND POSSI- BLY FALSE ALARM CONDITIONS. WARNING:EPDXY SEALANT MAY BE IR- RITATING TO EYES AND SKIN. MAY CAUSE SKIN SENSITIZATION IN SUS- CEPTIBLE INDIVIDUALS. MAY BE AB- SORBED THROUGH THE SKIN. EPDXY SEALANT CONTAINS EPDXY RESIN AND Note: Increase this minimum dimension if the tank diameter does not match the probe length. VINYL CYCLOHEXENE DIOXIDE. VINYL (Example:A 7'6"dia.lank will use an 8' CYCLOHEXENE DIOXIDE HAS CAUSED probe.The extra probeheight m h u twill be lodged in the riser pipe,which must be 6"longer SKIN CANCER IN ANIMAL TESTS. than the minimum in order to provide room.) Figure 39. Magnetostrictive Probe Installation Require- ments for Aboveground Storage Tanks. 27