Varec 6700, Инструкция по установке и эксплуатации

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Liquid Level Indicator
32 Installation and Operations Manual
Cone Roof Tank Installation (Fiberglass Tank)
Note Be sure to read General Preparation at the beginning of this section before pro -
ceeding with this installation.
Refer to Table 2 on page 4. See Figure 18 on page 38.
1. Determine the position on the tank roof, beneath which the center of the float will rise and
fall. Notice that this position is located a minimum of 16 inches [406 mm] and a maximum
of 36.00 inches [914 mm] from the wall of the tank.
2. Check the angle of the roof.
3. Lay out the coupling positions as shown in Figure 18. The float diameter is 14.50 inches
[368 mm]. The guide cable couplings are centered at 8.50 inches [216 mm] each side of
the float center. The indicator cable coupling is centered on a 17.00 inch [432 mm] diam -
eter.
4. Install the couplings into the top of the tank in a vertical position. Lengths of pipe screwed
into the couplings and held plumb will aid in proper orientation of these fittings. Failure to
place the couplings in a true vertical position may affect the accuracy of the Liquid Level
Indicator.
5. Make sure that the interior of all pipes are clean and corrosion free.
6. Use appropriate pipe thread compound on all pipe threads and install the 1-1/2 inch indi
-
cator pipe cable and the top cable anchors into their respective couplings.
7. Remove the housing nipple and cap from the top cable anchors and hang plumb lines from
them at the center to mark the position where the bottom cable anchor will be installed.
8. Mark the plumb bob string at the height of the tank bench mark. This will assure that the
plumb bob just touches the bottom when the reference is made from the bench mark dis -
tance to the bottom.
9. Hang a plumb line through the center of the top indicator cable pipe to the bottom to mark
the float center. This should be 8.50 inches [216 mm] at the bottom from each of the bot -
tom cable anchor positions
10. See Figure 18 for suggested bottom anchor configuration. When the position has been
checked, install the bottom anchor into place.
11. Thread one end of the float guide cable into the tank through one of the top anchor fit -
tings, through the bottom anchor channel and back up through the other top anchor fit -
ting. Thread each end of the guide cable through the top anchor assembly, pulling the
cable hand tight. Use the locking nut to lock the cable in place. Tighten the adjusting nuts
on each anchor assembly evenly until the guide cable is tensioned by the spring. Trim off
excessive cable.
12. Perform steps 13 - 21 under Cone Roof Tank Installation.
13. Install the gaugeboard support brackets into position. See Figure 18 and notice the relative
position of the top bracket. All other support brackets are seven feet [2.436 meters] below
the previous bracket, except for the last one which is a minimum of six inches [152 mm]
above the grade line.
14. Perform steps 23 - 25 under Cone Roof Tank Installation.
15. Loosen the nut on each side of the float that secures the guide cable retainer. Rotate these
retainers to open the key hole in the float cable guide. Position float with guide cables