VPS Installation
Vapor Vent Stack Installation - Wired VPS
16
18. Install one 68CA-4-4 male connector (item 5 in Table 2) onto the top of the new pipe (see View A-A,
10).
19. Measure, fabricate, and install ¼" 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.
All pitch of all vapor plumbing to drain should be 1/4" vertical per 12" horizontal to eliminate
any potential liquid traps.
21. Make sure the 3-way valve handle is set as shown in Figure
11.
22. Get the contents of the VPS drying tube kit (Table 3). Thread a tie wrap (item 3)through the slots in each of
the self-adhesive mounts (item 4). Place the top mount against the large cap on one end of the tube and
tighten the tie wrap until it is against the tube cap but you can still rotate the tube. Place the second mount
against the other end cap of the tube, again pulling the tie wrap through the mount until it is against the tube
cap but you can still rotate the tube.
23. Remove the two soft plastic seals from each end port of the drying tube. Get the Tygon tubing (item 2) from
the kit and attach one end of the tubing to one end of the drying tube. Slide the tubing onto the drying tube
as far as you can (snug). Referring to Figure
11, position the drying tube vertically in the enclosure with the
open port of the tube up, and estimate the length needed to loop from the bottom of the drying tube over to
the vent port (off center) of the VPS. Cut the Tygon tubing at the estimated length (approximately a foot or
so). Remove the paper cover from the self-adhesive base of the two tie wrap mounts and stick the drying tube
to the inside of the enclosure as shown in Figure
11. Pull each of the tie wraps snug and cut off the excess.
Attach the other end of the Tygon tubing to the vent port (off center) of the VPS.
The upper port of the drying tube must remain open and be oriented up as shown in
11.
For VPS sensor wireless installations, install the desiccant tube after installing the wireless
transmitter and battery pack components.
24. Install ½" electrical conduit from the conduit hub in the bottom of the enclosure to the customer supplied
weather-proof junction box (see Figure
10).
For Wireless installations skip Steps 24 - 27. The VPS sensor connects to a TLS RF
transmitter, not to field wiring from the TLS Console (see manual 577013-964 for
instructions).
25. Route the VPS cable into the I.S. junction box below the enclosure. Observing polarity, connect the VPS
wiring to the field wiring from the TLS console to the VPS wiring with wire nuts (see Figure
6). Seal wire nuts
in epoxy sealant following the instructions in Figure
7.
26. Push the epoxy sealed bag into the junction box. Replace and tighten the junction box cover.
27. For TLS-450PLUS console, connect VPS field wiring to a USM module (see Figure
8), For TLS-350
Consoles, connect VPS field wiring to a Smart Sensor Module (see Figure
9).
28. Close and secure the enclosure door by tightening the two T25 tamper-resistant Torx screws.
29. After the VPS sensor is installed, pressurize the tank ullage space and vapor piping to at least 2 inches WC
and test for leaks using leak detection solution.
