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Pressure Sensor Installation Vapor Vent Stack Installation Step and the pressure sensing port tube in the base of the sensor is facing down. Locate the pressure sensor in the clamp, but leave the conduit clamp screw somewhat loose for later sensor height adjustment. 5. Install two169CA-4-4 male elbows (item 4 in Table 2) into each end of the 3-way calibration valve (item 11 in Table 2) as shown (see Figure 11). 6. Install one 68CA-4-4 male connector (item 5 in Table 2) into the center port of the 3-way calibration valve, and then directly attach it to the pressure sensor inlet port (see Figure 7). 7. Screw the 59CA-4 plug (item 6 in Table 2) onto the left port's male elbow (see Figure 11). 8. Install the two plastic enclosure mounting plates to the back of the enclosure. Use the four short flat-head screws included in the enclosure hardware bag. 9. Install the composite panel into the enclosure (item 2 in Table 2) such that the sensor cable outlet is facing up and the pressure sensing port tube in the base of the sensor is facing down. The top symbol on the panel should be facing upward. Use the four short screws included in the enclosure hardware bag. 10. Make sure that the white flanged porous vent (factory installed - item 17 in Table 2) is still securely installed into the hole in the bottom of the enclosure (see Figure 11). 11. Insert the S-bend 'A" OD copper tube (item 9 in Table 2) into the right-side male elbow of the 3-way calibration valve, but do not fully tighten the compression nut (see Figure 11). 12. Locate the 62CABH-4 bulkhead union (item 7 in Table 2) and remove the compression nut and the adjustable nut then place a large washer (item 8 in Table 2) against the fixed, integral body nut. Slide the compression nut that was removed onto the bottom portion of the S-bend tube. 13. Partially insert the bulkhead union into the bottom center hole in the enclosure. Slide a large washer over the body, and thread the adjustable nut back onto the body. 14. Insert the bottom portion of the S-bend tube into the bulkhead union and fully tighten the bulkhead union adjustable nut against the large washer and enclosure wall.Adjust the pressure sensor vertically in the shim / conduit clamp to make sure the S-bend tube is fully inserted into the union and male elbow. 15. Fully tighten the compression nuts to connect the S-bend tube to the union and to the male elbow.Tighten the sensor conduit clamp screw to secure the sensor in its final vertical position (see Figure 11). 16. Mount the plastic enclosure onto the vapor vent stack or suitable rigid structure ABOVE the vapor vent stack port using two conduit clamps (for 2" or 3" pipe), bolts, nuts, and washers included, or use other customer supplied suitable mounting hardware (Example: Unistrut(g). Leave the mounting hardware somewhat loose for later enclosure height adjustment (see Figure 10). 17. Measure,fabricate, and install customer supplied pipe and pipe fittings between the vapor vent stack port and within a few inches of the bulkhead union in the bottom of the enclosure. 18. Install one 68CA-4-4 male connector (item 5 in Table 2) onto the top of the new pipe (see View A-A, Figure 10). 19. Measure,fabricate, and install 1/4" OD copper tubing (item 10 in Table 2) between the bulkhead union and the male connector.Adjust the enclosure vertically on vent pipe to make sure the copper tube is fully inserted into the bulk head union and male connector. 20. Fully tighten the compression nuts to secure the fabricated tube to the bulkhead union and to the male connector.Tighten the enclosure mounting hardware to secure the enclosure in its final vertical position. Note: Important!All plumbing's pitch to drain should be 1/4" vertical per 12" horizontal to eliminate any potential liquid traps. 10-14 CARB Approved IOM 10-Veeder Root Pressure Sensor-Executive Order VR-202