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2.
Prepare the excavation to the appropriate depth based on the elevation of the building sewer line. Concrete systems
should have a maximum burial depth of 42" below grade to top of the tank. HDPE systems should have a maximum
burial depth of 36½" below grade to top of the tank. Allow ⅛" of fall per foot from the building to the system. Fall through
the system is 5" from inlet invert to outlet invert. Therefore, the outlet line from the system must be installed 5" lower than
the inlet sewer line. The bottom of the excavation must be level and smooth. A 4" layer of gravel, sand or fine crushed
stone should be installed and leveled to within ¼" from side to side and end to end.
3.
Using extreme caution, place the pretreatment tank into the excavation. Place the anoxic tank in the excavation allowing
at least 1' between the pretreatment tank and the anoxic tank. Place the treatment tank in the excavation allowing at
least 1' between the anoxic tank and the treatment tank. Place the Bio-Film Reactors in the excavation allowing at least
2' between the treatment tank and the Bio-Film Reactor tanks. Insure tanks are installed square and level.
4.
Connect the building sewer line to the pretreatment chamber inlet. The inlet line must be laid continuously and unspliced
from the tank to undisturbed earth beyond the limits of the tank excavation.
5.
Install 4" Schedule 40 PVC pipe (distributor to provide) between the pretreatment tank and the anoxic tank. If the
pretreatment tee was not installed prior to tank delivery, it should be solvent welded to the transfer pipe inside the
pretreatment tank at this time as shown in Figure 1.
6.
Install 4" Schedule 40 PVC pipe (distributor to provide) between the anoxic tank and the treatment tank.
7.
Install 4" Schedule 40 PVC pipe and fittings (distributor to provide) between each treatment tank outlet coupling to the
corresponding Bio-Film Reactor tank inlet for the interconnect plumbing.
8.
Connect the discharge sewer line to the Bio-Film Reactor tank outlets continuously and unspliced from the tee combining
the Bio-Film Reactor tank outlets to undisturbed earth beyond the limits of the tank excavation. If using a one-piece
tanks, insert the outlet plumbing through tank outlet seals, leaving 4" to 6" protruding inside the tanks. Solvent weld the
4" Schedule 40 PVC outlet tees (distributor to provide) to the outlet plumbing.
9.
Lower subassembly S12 into the second anoxic chamber and solvent weld the pipe on the subassembly into the coupling
cast into the outlet of the anoxic chamber. The tee and short stub of pipe should be parallel to the floor and ceiling of the
tank as shown in Figure 2.
10. Solvent weld subassembly S11 from the first anoxic chamber to subassembly S12 from the second anoxic chamber as
shown in Figure 2. Subassembly S11 will need to be trimmed to length. Solvent weld the two sections of subassembly
S11 together. The elbow on subassembly S1 should be oriented as shown in Figure 2, with the short stub of pipe parallel
to the floor and ceiling of the tank.
11. Install risers as required to bring the access covers to grade.
Plant Wiring and Control Center Installation
1.
Electrical work must be performed in accordance with the latest edition of the National Electrical Code as well as applicable
local codes.
2.
All electrical service cable used with the Hydro-Kinetic system must be UL and CSA approved, type UF, #14/2 AWG
minimum and must have a full-size center ground. Larger cable is required if the length of the underground service is
greater than 80 feet. Consult your electrician for details.
3.
An approved cable must be installed from the air pumps to the junction box provided for connection to the control center.
If installing the air pumps in a location other than the aeration chamber risers, insure the air lines are no more than 75' in
length and the air pumps are protected from the elements in a clean, dry, well-ventilated area and proceed to step 6.
4.
Inspect the power cable entrance in the side of the first aeration riser. Remove any sharp edges or flash. Insert the free
end of the power cable through the shorter segment of a pre-formed ½" conduit ell (2' by 1'), then into the power cable
entrance of the aeration riser. Guide the power cable into the riser. Pull enough cable through the riser to reach 36"
above the riser top. Coil and secure the cable in the aeration riser so that it will not hang down into the tank. Repeat this
step for the second aeration riser.
5.
Lay the conduit ells with cable directly across the top and down the tank side. Do not allow the power cables to be laid
across the end of the tank or any removable access cover. Seal the connections between the conduits and the aeration
risers with mortar or approved sealant.
6.
A third underground cable must be installed unspliced from the Service Pro control center into the clarification chamber
riser to supply power to the recirculation pump.
Page 3
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