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Mar 28 08 10:04a Sandra Barnhait 2098458586 p.13 11. Purge remaining air from the system as follows: Turn on power at the load center, and dispense enough gasoline from the dispenser farthest from the pump to remove all the air from that line. Repeat this procedure with each dispenser, working your way back to the pump (other methods may be used as long as the air is removed). The STP-MLD will not work properly if all of the air is not removed from the system. Note: If, on dispensing fuel in Step 11 above,you find the flow restricted to 1-112 to 3 GPM. the leak detector has not ispense opened. This could be due to air trapped in the system. Turn on the submersible pump at the dr but do not dispense any fuel. Wait approximately 2-3 minutes. If the line is leak free the pump will pressurize the system opening the STP-MLD, then purge the air from all dispensers as in step 11 above. Note: This leak detector performs a line leak test within about 3-4 seconds from the time the submersible pump is turned on at the dispenser. Air or vapor in the system will cause this time to be longer in proportion to the amount of air or vapor in the lines. If the nozzle is opened before the completion of the line test the leak, detector will detect this ovenincy as a leak and restricted flow will result. Close the nozzle for a period of time to allow completion of the line test, and the leak detector will allow full flow again, provided there is no other escape of fuel. STP-MLD Line Leak Testing Note: To properly check aline leak detector the following is required: a graduated cylinder(usually graduated in milliliters) of approximately 300 mi volume, a test fixture which allows a leak of 3 GPH at 10 PSI(see Figure 1), and a stop watch or a watch with a sweep second hand. _iE [r TOF' T= -I:.0 �E T==_ 12. Turn the pump off at the load center, relieve the line pressure, and then remove the pipe plug in the r I shear-valve, Make adequate provision to trap any liquid that escapes to prevent environmental contamination. Install test fixture (pressure gage, leak valve and pressure valve) into the dispenser shear-valve port, see Figure 1, The test fixture will be used to introduce a 3 GPH leak @ 10 PSI. 13. With the leak valve closed, tum on the submersible pump at the load center and at the dispenser and look for leaks at the port of the shear-valve. 4' Note: If there are any leaks, immediately shut the pump off at both the dispenser and at the load center, �I tag and lock out the breaker, and eliminate the "' •',..• leaks. Repeat step 13 to verify. 14. Turn the : Tl pump off at the dispenser and open both valves, draining the fluid into a suitable container, and observe the pressure dropping to zero Continue out the untilthere re is no more product omi e, turn the pump on at the dispenser and observe the pressure gauge. IF! ;'U'' -I:n��'�_U. :_„ The pressure should increase quickly up to 12 to 18 IPLPSI, and hesitate for 1-0 seconds or longer if there is Figure 1 air or vapor trapped in the system, and then increase to full pump pressure. 15. With the submersible pump on, adjust the leak valve and pressure valve simultaneously until 10 PSI and 3 gph or less are attained, while draining the fluid into a suitable container. Catch the output product into a graduated cylinder for 60 seconds (or the equivalent product measurement for a shorter time period, i.e., 94 milliliters at 30 seconds=188 milliliters per 60 seconds). Tum off the pump and calculate the leak rate detected as follows: Leak Rate GPH=((milliliters of fuel caught 160 seconds)x.96) Notre: The detected leak rate must be set to 3 GPH or less per EPA standards. If the leak rate needs to be adjusted, repeat step 15 while increasing or decreasing the leak rate and maintaining 10 PSI at the pressure gage. 5