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F4Site Preparation and Inslation Instructions TLS -350 UST Monitorintem 1. Use a standard 4" tank locking cap, "Evertite" or equivalent, with standard ring adaptor. 2. Drill and tap the cap for a 3/8 x 18 NPT cord grip thread (see Figure 23, "Probe Riser Cap Modification"). 3. Install a water -tight cable bushing in the 3/8" threaded hole in the top of the cap. Use an appropriate thread sealant to ensure water -tightness. Also install a water- tight cable bushing in the probe junction box in a similar manner. ± .062 1.438 375 — 18 N.P.T. ' t ` ±.062 1.625 �I 3 L b3�� Figure 23. Probe Riser Cap Modification. C. INSTALLATION. Install each probe as follows (see Figure 24, "Capacitance Probe Installation Requirements"). lft WARNING: TO AVOID ELECTRICAL SHOCK WHICH COULD KILL YOU, BE SURE AC POWER TO THE MONITOR IS OFF DURING INSTALLATION. Turn OFF power to the TLS -350 system. 6 CAUTION: DO NOT INSTALL THE PROBE IF ANY LIQUID OTHER THAN THE PRODUCT TO BE DISPENSED IS IN THE TANK. FAILURE TO COMPLY CAN RESULT IN EQUIPMENT DAM- AGE, INACCURATE INVENTORY CONTROL, OR UNDETECTED POTENTIAL ENVIRONMENTAL AND HEALTH HAZARDS. 2. Make sure any liquid other than the product to be dispensed has been pumped out of the tank. ifCAUTION: Capacitance probes contain a glass cyl- inder which can be broken if the probes are dropped or struck during handling and installation. Probes are sensitive measuring devices and should be handled carefully at all times. 3. Be sure there is no sludge in the bottom of the tank. Sludge can clog the water -entry hole near the bottom of a capacitance probe, resulting in inaccurate water height readings from the probe. 4. Attach the probe cable connector to the mating plug on the top of the probe. Be sure the connector is attached securely by hand tightening the locking ring. 22 • " MINIMUM DIA WEATHERPROOF MANHOLE CONCRETE SLAB 1/2" RIGID OR PACKED EARTHr1l COR0 GRIP SE ALS PER NEPA 80 SUPPLIED WITH PROBE FROM MONITOR PROBE • WEATHERPROOF STRAIN RELIEF v . JUNCTION BOX WITH 1:2 INCH NPT THDS CHAIN 16 CUBIC INCH MINIMUM) EPO%V SEAL NFPA PER SPEC 20" MIN SEE zNOTE 2 -WIPE CABLE SUPPLIED WITH RISER DIMENSION PROBE SHOULD BE 20" TO THE BOTTOM OF THE RISER CAP 900"API PIPE SCHEDULE90 CAPACITANCE PROBE TANK (DdI3 nps 6 dI.iI Ine Probe Ieogin. le. A T6" Gia. w u n B' )1-9.1 1.9 1 OrPOe. me exva Probe nei9nl will ne P11b, n me ri e. PIPs, w icn m si ee fi" longer I— Ine minimum In orae, 1. P—i room.I Figure 24. Capacitance Probe Installation Requirements. 5. Carefully lower probe into the riser pipe until it gently touches the bottom. ifCAUTION: HANDLE PROBE CAREFULLY! STRIKING OR DROPPING PROBE WILL RESULT IN LOSS OF CALIBRATION AND COULD CAUSE PERMANENT DAMAGE. 6. Feed the two -wire probe cable (furnished with each probe) up through the cap bushing and in through the junction box bushing. Leave enough slack in the cable between the cap and junction box to allow the cap to easily reach the riser pipe. In addition, leave enough slack under the riser cap to permit connection to the probe and to allow the probe to rest on the bottom of the tank. 7. Using wiring nuts, connect the wires from the probe cable to the probe field wires in the junction box (see Figure 25, "Two -Wire Probe Field Wiring Diagram"). Be sure to observe proper polarity between the probe and monitor wiring during installation. Figure 25. Two -Wire Probe Field Wiring Diagram. 101 •I WEATHERPROOF JUNCTION BOX (1 PER PROBE) 1/2" RIGID CONDUIT _ y glk • TO FROM MONITOR PROBE • + Wht Figure 25. Two -Wire Probe Field Wiring Diagram. 101 •I