WPLLD Site Prep and Installation Guide
Red Jacket Pumps (Except Quantum and The Red Jacket)
4-3
ADJUSTING THE PRESSURSTAT RELIEF PRESSURE (FOR 3.0 GPH TESTING ONLY)
Read this section if you have purchased a Pressurstat valve to run 3.0 gph tests only.
To adjust the relief pressure:
1. Remove the brass cap [Figure 4-3] by unscrewing it.
2. Turn down the adjustment screw. Tightening the screw clockwise increases the pressure. When the adjustment screw
is fully down, the relief pressure is approximately 40 psi. Set the relief pressure to 20 - 25 psi; measure pressure by
installing a pressure gauge on the line. Verify the relief pressure by using the console; refer to “Enable the Line for
Dispensing” on page 6-3 for the procedure to obtain pressure readings.
3. Replace the brass cap - you only have to hand tighten it because the O-ring completes the seal.
Figure 4-3. Pressurstat Adjustable Check Valve
DISABLING THE FUNCTIONAL ELEMENT (REQUIRED FOR 0.2 & 0.1 GPH TESTING)
The WPLLD valve eliminates the need for the pump’s functional element. You must modify the functional element as
part of the WPLLD system installation on Red Jacket pumps.
1. Remove the six slot-head screws from the functional element [Figure 4-4].
2. Remove the functional element’s spring and piston.
3. Carefully reassemble the functional element using a new diaphragm suitable for the fuel involved. Be sure that all
gasketed surfaces are free from debris when reinstalling.
4. Torque the six slot-head screws to 40-65 in-lbs.
WARNING
CAREFULLY REASSEMBLE AND RESEAL THE FUNCTIONAL ELEMENT, FOLLOWING
THE PROCEDURES DESCRIBED IN THIS MANUAL OR FIRE, EXPLOSION, OR GROUND
CONTAMINATION COULD OCCUR.
Brass Cap
Adjustment Screw
O-ring
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