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' Vac System Testing Running a Manual Test <br /> Running a Manual Test <br /> Perform the Manual Test for Each Vac Sensor <br /> You enter the DIAG MODE of the TLS Console by pressing the MODE key until its display appears. Press the <br /> FUNCTION key to select diagnostic functions and the STEP key to view each of the Function's displays.Where <br /> you can enter changes to displayed data,you do so with the same front keys used enter to system programming <br /> selections (i.e., ENTER, CHANGE, etc.). <br /> Figure 19 displays the Vac Sensor Manual Test procedure steps and Figure 20 displays the Vac Sensor Evac Hold <br /> procedure steps. <br /> Vacuum Sensor Operability Test - Required for Each Sensor Prior to Startup <br /> 1. Vacuum leak test:Turn the 3-way ball valve handle (connected to the interstice being monitored)from its down <br /> 'operating' position all the way up to its 'test' position.This should vent the vacuum sensor to atmosphere <br /> while maintaining vacuum in the interstice. <br /> 2. Wait at least 1 minute at the console for the system to produce a'No Vac' alarm. Press the console's Alarm/ <br /> Test key to silence the beeper and acknowledge the alarm. <br /> 3. Turn the 3-way ball valve handle all the way down to its 'operating' position. <br /> 4. At the console enter the DIAG MODE and initiate a manual test that will clear the 'No Vac' alarm (Refer to <br /> Figure 19 for Manual Test instructions). <br /> 5. Vac Float Liquid Sensor (in containment sump) test:This test is performed using water, gasoline, or other <br /> appropriate test liquid for systems with the float housing in the containment sump. Unscrew the lower float <br /> bowl (about a 1/4 turn) from the Vac Float body and fill the bowl with the test liquid. Screw the filled bowl back <br /> onto the Vac Float body and a Liquid Alarm will be generated. At the console press the Alarm/Test key to <br /> silence the beeper and acknowledge the alarm.Again unscrew the bowl to clear the alarm. Empty the bowl, <br /> wipe it clean, then screw it onto the Vac Float body. <br /> 6. For double-walled tanks, the interstitial sensor must be removed from the tank to perform a functional test. <br /> Refer to the Operability Testing Guide (P/N 577013-814) and follow'Testing Procedure C' (interstitial sensor <br /> for steel tanks) or'Testing Procedure E' (interstitial sensor for fiberglass tanks) as applicable. <br /> 7. Print the test history and console status for your records.This completes the test procedure. Report any <br /> performance concerns to Veeder-Root while on site. <br /> 25 <br />