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FI*Site Preparation and Illation Instructions TLS-350 UST Monitoriystem • SECTION 9. PIPING SUMP SENSOR dance with the National Electrical Code (NFPA70) and INSTALLATION the Automotive and Marine Service Station Code (NFPA30) since they pass from a Class I, Division I or Division II A. GENERAL. area into a nonhazardous area. The sump sensor comes with the following hardware necessary to mount it within the piping sump: 1- PVC Mounting Sleeve 1- Aluminum 900 Mounting Bracket 1- Cord Grip 2 - #6-20 (0.312" long) Sheet Metal Screws The sump sensor can be mounted in either of two ways: on the sensor junction box using the mounting bracket and sleeve supplied (see Figure 54, "Typical Bracket Mount"); or, by cementing the PVC mounting sleeve directly to the side of a fiberglass containment sump (see Figure 55, "Mounting Sleeve Cemented to Sump Wall"). Before you install the sump sensor, there are several important requirements to consider: 1. The sump sensor must be positioned as close to the containment sump outer wall as possible. 2. The sump sensor must be mounted in a true vertical position to ensure proper operation of the float switch contained inside. 3. There must be at least one inch of clearance between the bottom of the mounting sleeve and the base of the sump. 4. When installed, the sump sensor must rest on the base of the sump. B. INSTALLATION. The wires between the monitor and each sump sensor location must be of a type designed for use in the presence of gasoline and oil, and must be between AWG 14 and AWG 18. The conduit must be properly sealed in accor- LEADERCABLE CORD GRIP MOUNTING BRACKET SUMP WALL JUNCTION BOX I 1 I I MOUNTING SLEEVE SUMP SENSOR SWITCH Figure 54. Typical Bracket Mounting. 34 1WWARNING: TO AVOID ELECTRICAL SHOCK WHICH COULD KILL YOU, BE SURE AC POWER TO THE MONITOR IS OFF DURING INSTALLATION. 1. Turn OFF AC power to the TLS -350 system. 16 CAUTION: DO NOT INSTALL THE SUMP SEN - SOR IF THERE IS ANY LIQUID IN THE PIPING SUMP. FAILURE TO COMPLY CAN RESULT IN EQUIPMENT DAMAGE OR UNDETECTED PO- TENTIAL ENVIRONMENTAL AND HEALTH HAZARDS. 2. Make sure no liquid exists in the piping sump. 3. To mount the sump using the mounting bracket (see Figure 54, "Typical Bracket Mounting"): a. Attach the mounting bracket to the mounting sleeve using the two #6-20 0.312" long screws furnished. ",� NOTE: Screw holes drilled in the mounting sleeve ,N are closer to the one end than the other. Check the distance from the top of the junction box to the bottom of the sump to determine which way you will mount the bracket. You must leave some space between the bottom of the mounting sleeve and the base of the sump. b. Remove one of the plugs from the top of the junction box. c. Position the mounting bracket on top of the junction box aligning the hole in the bracket with the threaded hole in the box. Figure 55. Mounting Sleeve Cemented to Sump Wall.