COMPLIANCE INFO_1985-2005 - Laserfiche WebLink

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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 TYPE INTERSTITIAL SENSOR — 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. CAUTION: DO NOT USE A KNIFE OR OTHER SHARP OBJECT TO MARKTHE LEADER CABLE. MARKTHE DISTANCE WITH A MARKER, TAPE, OR A TWIST TIE. 2. Lower the float switch assembly into the riser pipe until the float switch touches the bottom of the tank (see Figure 43, "Float -Switch Type Interstitial Sensor Installation—Steel Tanks"). Figure 43. Float -Switch Type Interstitial Sensor Instal- lation – Steel Tanks. 3. Keeping the cable taut, secure the sensor assembly in place by attaching the grip cord. NOTE: The float switch assembly must not hang by the cable, but should rest lightly on the bottom of the tank supported by the cable. 4. Secure the riser cap to the riser pipe. 5. Tighten the cord grip on the riser cap and junction box to ensure a water -tight seal at the cable entry. Site Preparationnstallation Instructions v TLSa�UST Monitoring System 6. Using wire nuts, connect the two -wire sensor cable to the field wires in the sensor junction box (see Figure 44, "Two -Wire Float -Switch Sensor Field Wiring Diagram"). Since these are contact switches, polarity is not a consideration when connecting sensor wires to field wires. WEATHERPROOF JUNCTION BOX (1 PER SENSOR) 112" RIGID CONDUIT • TOFROM MONITOR SENSOR Figure 44. Two -Wire Float -Switch Sensor Field Wiring Diagram. 7. Seal wire nuts with epoxy sealant using one bag for two wire nut connections. (Refer to Figure 26, "Epoxy Sealant for Two -Wire Connections.") 16 CAUTION: IF MORE THAN TWO WIRE NUT CONNECTIONS SHARE AN EPDXY SEALANT BAG, THE CONNECTIONS WILL RESULT IN INACCURATE SENSOR READINGS AND POSSI- BLY FALSE ALARM CONDITIONS. WARNING: EPDXY SEALANT MAY BE IRRI- TATING TO EYES AND SKIN. MAY CAUSE SKIN SENSITIZATION IN SUSCEPTIBLE IN- DIVIDUALS. MAY BE ABSORBED THROUGH THE SKIN. EPDXY SEALANT CONTAINS EP- OXY RESIN AND VINYL CYCLOHEXENE DI- OXIDE. VINYL CYCLOHEXENE DIOXIDE HAS CAUSED SKIN CANCER IN ANIMAL TESTS. PRECAUTIONS: AVOID EYE AND SKIN CON- TACT. WEAR IMPERVIOUS GLOVES AND SAFETY GLASSES. USE ONLY IN WELL VEN- TILATED AREAS. C. INSTALLATION OF FLOAT -SWITCH TYPE INTERSTITIAL SENSOR — FIBERGLASS TANKS. 1. To ensure the sensor will reach the bottom of the annular space, the splice between the leader cable and the sensor must be 1 foot from the bottom of the riser pipe (see Figure 45, "Float -Switch Type Interstitial Sensor Installation—Fiberglass Tank"). First measure the sensor riser pipe from the bottom of the pipe to the top. Subtract one foot from the riser pipe measurement, then measure that distance up the leader cable from its connection to the sensor; mark the leader cable. CAUTION: DO NOT USE A KNIFE OR OTHER SHARP OBJECT TO MARKTHE LEADER CABLE. MARKTHE DISTANCE WITH A MARKER, TAPE, OR A TWIST TIE. 29