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Mar 28 08 10:04a Sandra Barnhart 98 58586 p,15 <br /> Troubleshootinq <br /> Problem <br /> Slow Flow(STP-MLD is in the Tripped position only allowing 3 GPM or less flow rate) <br /> Possible Causes <br /> I. System leak(i.e.,line,dispenser,STPAST,etc.) <br /> 2. Thermal contraction <br /> 3. No time delays in dispensers or not set correctly <br /> 4. Incorrect STP-MLD version <br /> 5. Tank emptylair in lines <br /> 6. Power to STP is off or defective dispenser switch signal(hcok) <br /> 7. Defective MLD <br /> Actions <br /> I. Visually inspect all areas for leaking product. <br /> 2. Insert a pressure gauge in shear valve, <br /> 3. Cycle the pump to confirm that the system is holding pressure. If pressure is not holding, conduct a line test thrcugh <br /> the STPiIST. If there are any system leaks, repair, then retest the system. If system has no leaks (line or <br /> submersible),thermal contraction maybe a possible cause. Continue to the next step. <br /> 4. Test for thermal contraction per FE Petro Technical Bulletin TB-001. If thermal contraction has been verified,continue <br /> with the next step. <br /> 5. Find the opening time (test cycle) of the STP-MLD. Follow step 14 and time how long it takes from when the <br /> submersible pump is turned on until it reaches full pump pressure. The STP-MLD and STIP-MILD-0 models typically <br /> take 2-4 seconds and 10 -20 seconds for STP-MLD-E model. If the test time is not within these specifications, it is <br /> possible that then-is a line leak,air/vapor in the line or not using the correct STP-MLD model for the installaton,thus <br /> causing the opening time to increase. Cycle the power and time the number of seconds it takes for the solenoid valve <br /> in the dispenser to'click' open,this is an audible indicator and usually easy to hear. This time must be approximately <br /> two seconds greater than leak detector opening time. Consult dispenser manuals for solenoid time delay installation <br /> or adjustment <br /> 6. If problems continue,contact FE Petro Technical Support at 1-800-225-9787. <br /> Problem <br /> Not catching a 3 GPH leak at 10 PSI <br /> Possible Causes <br /> 1. AirNapor in system <br /> 2. STP-MLD installed incorrectly <br /> 3. Using the incorrect STP-MLD version <br /> 4. Testing procedure <br /> 5. Defective MLD <br /> Actions <br /> 1. Make sure all airlvapor in the system has been purged,see step 11. If no airlvapor is present ccrtinue wish next step. <br /> 2. Make sure STP-MLD;s instal;ed correctly: <br /> a. STP-MLD must be installed in leak detector port on submersible pump manifold cr adapter tee lousing and <br /> make sure the O-ring is present and not damaged <br /> b. The vapor-ube must be installed and vented back to the tank port from the STP-MLD <br /> c. Make sure there are not any in-line check va,ve5 between the dispenser solenoid valve and the STP-MLD <br /> d. If a manifolded system, only one submersible pump can turn on at a time during the leak testing cycle <br /> e. There must be less than 12 feet of static head in the system <br /> 3. Make sure the correct STP-MLD model is being used for the applicaticn (product and piping), see FE Petro technical <br /> bulletin TB002(i.e.some flexible piping will requi•e the use of the STP-MLD-E model). <br /> 4. Is the leak testing fixture calibrated correctly(3 GPH leak @ 10 PSI;. Has the STP-PALD been fully tripped before testing, <br /> see step 16. <br /> 5 If problems continue,contact FE Petro Technical Support at 1-80D-225-9787. <br /> Note: If your STP-MLD does not operate correctly or there are any questions concerning installation or service, <br /> please contact FE Petro Technical Service at(800)225-9787. <br /> 7 <br />