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Site Preparatior d Installation Instructions <br /> TL_ .,50 UST Monitoring System <br /> SECTION 7.INTERSTITIAL LIQUID SENSOR 3. Keeping the cable taut,secure the sensor assembly in <br /> INSTALLATION place by attaching the grip cord. <br /> A. EQUIPMENT PREPARATION. NOTE:The float switch assemblymust not hangby <br /> 0 the cable,but should rest lightly on the bottom of the <br /> WARNING: TO AVOID ELECTRICAL SHOCK tank supported by the cable. <br /> WHICH COULD KILL YOU, BE SURE AC 4. Secure the riser cap to the riser pipe. <br /> POWER TO THE MONITOR IS OFF DURING <br /> INSTALLATION. 5. Tighten the cord grip on the riser cap and junction box <br /> to ensure a water-tight seal at the cable entry. <br /> 1. Turn OFF power to the TLS-350 system. <br /> 6. Using wire nuts,connect the two-wire sensor cable to <br /> 16 NOTE: Do not install the sensor if any liquid is the field wires in the sensorjunction box(see Figure 44, <br /> present in the annular space.Failure to comply will 'Two-Wire Float-Switch Sensor Field Wiring Diagram"). <br /> lead to an alarm. Since these are contact switches, polarity is not a <br /> 2. Make sure no liquid is present in the annular space. consideration when connecting sensor wires to field <br /> wires. <br /> B. INSTALLATION OF FLOAT-SWITCH TYPE <br /> INTERSTITIAL SENSOR —STEEL TANKS. <br /> WEATHERPROOF <br /> 1. To be sure the sensor will reach the bottom of the JUNCTION BOX <br /> annular space,first measure the sensor riser pipe from 1'2 RIGID PERSENSOR) <br /> the bottom of the pipe to the top. Then measure the CONDUIT <br /> same distance up the leader cable from its connection • <br /> to the sensing element and mark the leader cable. TO FROM <br /> 16 CAUTION: DO NOT USE A KNIFE OR OTHER MONITOR SENSOR <br /> SHARP OBJECT TO MARKTHE LEADER CABLE. <br /> MARKTHE DISTANCE WITH A MARKER,TAPE, • <br /> OR A TWIST TIE. <br /> 2. Lower the float switch assembly into the riser pipe <br /> until the float switch touches the bottom of the tank Figure 44. Two-Wire Float-Switch Sensor Field Wiring <br /> (see Figure 43,"Float-Switch Type Interstitial Sensor Diagram. <br /> Installation—Steel Tanks"). <br /> 7. Seal wire nuts with epoxy sealant using one bag for two <br /> Dwire nut connections. (Refer to Figure 26, "Epoxy <br /> �,. """°L` Sealant for Two-Wire Connections.") <br /> ]CORD GRIP SEALS <br /> SUPPIIEO WI IN°SEN,ASOR <br /> CAUTION: IF MORE THAN TWO WIRE NUT <br /> CONNECTIONS SHARE AN EPDXY SEALANT <br /> .• <br /> WEATHERPROOF BAG, THE CONNECTIONS WILL RESULT IN <br /> `"' C <br /> °"`'°"NR°`w'r" <br /> Pr INACCURATE SENSOR READINGS AND POSSI- <br /> BLY FALSE ALARM CONDITIONS. <br /> SPEJ SEAL <br /> Ea NEPA <br /> SPEYr°N <br /> T CIIOlIoN RO• WARNING: EPDXY SEALANT MAY BE IRRI- <br /> ., REDUCER TATING TO EYES AND SKIN. MAY CAUSE <br /> SKIN SENSITIZATION IN SUSCEPTIBLE IN- <br /> LE.RCEf s- DIVIDUALS.MAY BE ABSORBED THROUGH <br /> ---]'DIA RISER <br /> THE SKIN.EPDXY SEALANT CONTAINS EP- <br /> OXY RESIN AND VINYL CYCLOHEXENE DI- <br /> OXIDE.VINYL CYCLOHEXENE DIOXIDE HAS <br /> CAUSED SKIN CANCER IN ANIMAL TESTS. <br /> j PRECAUTIONS:AVOID EYE AND SKIN CON- <br /> TACT. WEAR IMPERVIOUS GLOVES AND <br /> SAFETY GLASSES.USE ONLY IN WELL VEN- <br /> a l <br /> i TH.ATED AREAS. <br /> C. INSTALLATION OF FLOAT-SWITCH TYPE <br /> INTERSTITIAL SENSOR — FIBERGLASS <br /> TANKS. <br /> SiF(L rAN. <br /> 1. To ensure the sensor will reach the bottom of the <br /> vlEw Oi 5l NSOa SwIICw <br /> RDIID�DI I"^ annular space,the splice between the leader cable and <br /> the sensor must be 1 foot from the bottom of the riser <br /> Figure 43. Float-Switch Type Interstitial Sensor Instal- pipe (see Figure 45, "Float-Switch Type Interstitial <br /> lation–Steel Tanks. 29 <br />