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WARNING! Disconnect, lock out, and tag power at the panel before servicing the pump. <br />When servicing equipment, use non -sparking tools and use caution when removing or installing <br />equipment to avoid generating a spark. <br />1. Block the lines at each dispenser. (Trip the dispenser shear valve.) <br />2. Lock down the pump check valve by turning the check valve lock down screw clockwise as far as it will turn <br />(see Figure 19). <br />3. Remove the 1/4" NPT line test port plug and apply the line test pressure at the line test port (50 psi (345 kPa) <br />maximum). <br />CAUTION! Excessive pressure (above normal test pressure of 50.55 psi (345.380 kPa) may damage the pump <br />check valve seat and other system components. <br />4. After the completion of the test, release the pressure by: <br />a. Turning the check valve lock down screw counterclockwise as far as it will go. <br />b. Remove the protective cover from the Pressurstat (see Figure 20) and turn the Pressurstat adjustment <br />screw counter clockwise until the screw protrudes 3/4", this will relieve the line pressure to "0" psi. <br />Apply an adequate amount of fresh, UL classified for petroleum, non -setting thread sealant on the 1/4" <br />NPT line test port plug and replace it. Torque the plug to 14 - 24 ft -lbs (19.4 - 29 N -m). <br />Adjust desired relief pressure per instructions on page 26 and replace the protective cover. <br />5. If applicable, unblock lines at each dispenser. <br />Check valve <br />lockdown screw <br />�j <br />Screw out <br />(normal position) V NPT port <br />Screw in for <br />line and tank <br />pressure testing <br />Iloo <br />1/4" , IPT lire test port <br />Two 1/4" NPT tanktest ports ---� i <br />.trap denreec apart.) <br />rfES'�'Cti9.=.ps <br />a i <br />Figure 19. Maxxum Packer -Manifold Assembly: Line and Tank Testing <br />24 <br />