26
Testing the Installation
Testing the Piping
Disconnect, lock out, and tag power at the panel before servicing the
pump.
When servicing equipment, use non-sparking tools and use caution when removing or installing
equipment to avoid generating a spark.
1. Block the lines at each dispenser. (Trip the dispenser shear valve.)
2. Lock down the pump check valve by turning the check valve lock down screw clockwise as far as it will turn
(see Figure 17).
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)
maximum).
Excessive pressure (above normal test pressure of 50-55 psi (345-380 kPa) may dam-
age the pump check valve seat and other system components.
4. After the completion of the test, release the pressure by:
a. Turning the check valve lock down screw counter clockwise as far as it will go.
b. Remove the protective cover from the Pressurstat (see Figure 18) and turn the Pressurstat adjustment
screw counter clockwise until the screw protrudes 3/4”, this will relieve the line pressure to “0” psi.
Apply an adequate amount of fresh, UL classified for petroleum, non-setting thread sealant on the 1/4”
NPT line test port plug and replace it. Torque the plug to 14 - 24 ft-lbs (19.4 - 29 N•m).
Adjust desired relief pressure per instructions on page 28 and replace the protective cover.
5. If applicable, unblock lines at each dispenser.
Figure 17. Maxxum Packer-Manifold Assembly: Line And Tank Testing
1" NPT port
1/4" NPT line test port
Two 1/4" NPT tank test ports
(180 degrees apart)
Check valve
lockdown screw
Screw out
(normal position)
Screw in for
line and tank
pressure testing
rj/051-301-19.eps
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