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SERVICE BULLETIN FE M FIRO_ SB008 Franklin u l i May 20, 2004 Tank Fluid Positive Rate Increase The intent of this Service Bulletin is to provide the proper troubleshooting procedure for testing an STP/IST (Submersible Turbine Pump/Intellegent Submersible Turbine) as a cause of a tank fluid positive rate increase. Some tank monitoring systems continually conduct leak tests for fluid increases (i.e. Veeder-Root CSLD Increase Rate Warning). Other than the STP/IST,tank fluid positive rate increases can also be caused by: • Incorrectly programing the tank monitoring equipment (i.e. incorrect temperature coefficient of thermal expansion entered) • Manifolded tanks with syphon bar leakage • Stage II Vapor Recovery Systems • Water leaking into the tank Warning: Highly flammable vapors or liquids may be present in the environment in which this equipment is installed or serviced. Installing or working on this equipment means working in an environment that presents risks of severe injury or death if instructions and standard industry practices are not followed. Follow all applicable codes governing the installation and servicing of this product and the entire system. Always lock out and tag electrical circuit breakers while installing or servicing this equipment and related equipment. Refer to the Installation and Owner's Manual of this equipment and related equipment for complete installation and safety information. Providing the above are not the cause of a tank fluid positive rate increase, the following are some possible STP/IST causes... Note: After completing any of the following troubleshooting steps, perform a tank test to verify proper operation before proceeding to the next step. Possible STPAST Causes 1) The Syphon Jet is plugged with debris. One of the Syphon Jets functions is to hold product in the column pipe when the STP/IST is turned off. By keeping the column pipe primed with product, it helps prevent the possibility of air getting into the piping system. If the Syphon Jet becomes clogged with debris, air could be introduced into the column pipe which would allow product to slowly drain out, so make sure to inspect the Syphon Jet during the troubleshooting process. Inspecting the Syphon Jet a) Tum the electrical power supply off at the load center. Lock out and tag the electrical power supply to the STP/BST. b) Remove the 3/8"Plug from the Manifold Discharge Head(see Figure 1 &3). c) Unscrew the Syphon Jet using a large standard screwdriver and then remove it with a needle-nose pliers. d) Inspect the Syphon Jet by blowing air from the bottom of it upwards,just like it's installed in the STP/IST(see Figure 2). No leakage should occur, but, if it does leak, then the Syphon Jet needs to be cleaned or replaced. e) Reinstall the Syphon Jet making sure that the O-ring is in place and that the O-ring seating surfaces are clean. f) Apply non-hardening, UL classified, gasoline-resistant pipe sealing compound to the 3/8" pipe plug and reinstall it. g) Turn the STP/IST's power back on at the electrical supply box and check the STP/IST for leaks by energizing the dispenser. h) If any leaks are found,then tum off the power and correct the leaks. 2) The STPAST is not holding static line pressure. See Service Bulletin SB007 for STP/IST Static Pressure Testing procedures and information. Note: If the STP/IST Check Valve and/or the Manual Pressure Relief are responsible for tank level positive rate increases, there should also be an indication of a line leak failure (i.e. the line is not holding pressure, the piston leak detector is tripped in slow flow, or there are continual 3 GPH electronic line leak failures, etc.). Page 1 of 2