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0 0 <br /> PLLD Site Prep and Installation Guide Adjusting the Pressurstat Relief Pressure for 3 GPH Testing <br /> r External O-ring\ <br /> Housing <br /> k <br /> � I <br /> Remove Check valve&0-ring <br /> ✓ . Remove Spring <br /> Retainer <br /> plldp alvasm cps plug <br /> Figure 4-6. Check Valve Assembly for Bennett Pumps(Suspension Valve Assembly Shown) <br /> Adjusting the Pressurstat Relief Pressure for 3 GPH Testing <br /> This procedure is for Red Jacket pumps (Excluding Quantum Pumps with SpikeCheck Valve and Red Jacket and <br /> Quantum pumps using SwiftCheck valve). <br /> Read this section if you have purchased,or your STP is equipped with,a Pressurstat adjustable valve to run 3.0 gph tests <br /> only.Refer to"Before You Begin"on page 1-2 for more information. <br /> To adjust the relief pressure: <br /> 1. Remove the brass cap[Figure 4-71 by unthreading it. <br /> 2. Turn down the adjustment screw [Figure 4-71.Tightening the screw clockwise increases the pressure.When the <br /> adjustment screw is fully down,the relief pressure is approximately 40 psi. Set the relief pressure to 20-25 psi; <br /> measure pressure by installing a pressure gauge on the line.Verify the relief pressure by using the console;refer to <br /> "4. Enable the Line for Dispensing"on page 6-2 for the procedure to obtain pressure readings. <br /> 3. Check the sealing surface for the O-ring and the condition of the ring.Clean or replace as required. <br /> 4. Replace the brass cap and hand tighten (the O-ring completes the seal between the body and cap). <br /> Brass Cap u <br /> I <br /> Adjustment Screw <br /> O-ring <br /> 2 <br /> E <br /> Figure 4-7. Red Jacket Pump Pressurstat Adjustable Valve Assembly <br /> 4-6 <br />