Installation Manual:
AdvanTex
®
AX20-RT Treatment Units
NIM-ATX-AXRT-1
Rev. 1.0, 1/10
© 2010 Orenco Systems
®
Inc.
8
Step 6: Prep and Install Counterbuoyancy
Because of the shallow burial depth of the AX20-RT, you may
need to install counterbuoyancy measures on the unit, especially
if the site has seasonally high groundwater. If you are unsure
whether or not your installation requires counterbuoyancy mea-
sures, contact your Dealer or Orenco.
There are two types of counterbuoyancy offered by Orenco, fac-
tory counterbuoyancy flange kits or counterbuoyancy tie-down
hardware kits.
6a) Counterbuoyancy Flanges:
1:
Using properly-sized lifting equipment, Raise the AX20-RT
unit 3-4 in. (75-100 mm) off of a flat, level surface.
2:
Lightly sand the contact surfaces on the upper surfaces of the
flanges and the bottom of the AX20-RT, and then clean the sand-
ed surfaces with acetone and clean, dry, lint-free rags.
3.
Apply a ¾-in. (19-mm) bead of SS115 or SS140 adhesive
down the length of each flange.
4.
Slide the flanges under the AX20-RT unit, and then lower the
unit onto the flanges. Allow the adhesive to set before moving
the AX20-RT.
6b) Counterbuoyancy Tie-Downs:
Orenco’s tie-down counterbuoyancy hardware kits are for use
with concrete forms. Sections of 12-in. diameter PVC half-pipe
or chamber material can be used as forms; simple forms 12 in.
wide × 6 in. high × 4 ft long (305 mm × 152 mm × 1.22 m) can
be built from wood.
NOTE:
To save time, we recommend preparing the counter-
buoyancy measures offsite before you install the unit.
1: Fill
the forms halfway with concrete, and then place two #4
reinforcing bars in each of the forms.
2: Finish
filling the forms with concrete.
NOTE:
Wait for the concrete to set completely before lifting
the counterbuoyancy measures.
3: Use
appropriate lifting equipment to set the pieces in place.
4: Secure
the pieces to the unit with the supplied cables and
hardware.
Counterbuoyancy tie-down cables and half-pipe con-
crete forms
Two #4
rebar
Cable
12 in.
(305 mm)
6b
6 in.
(152 mm)
4 ft
(1.22 m)
