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  • 1.

    Prepare an excavation, having a diameter approximately one foot larger than the tank and a depth that will allow approximately three inches of the inspection port to extend above normal ground level. Backfill with a six inch layer of sand or gravel if otherwise unable to provide a smooth, level, compact base. We recommend that the hole be roped off in some fashion to prevent injury to passersby.

  • 2.

    Utilizing lifting lugs provided, place the plant in the excavation so that the inlet and outlet line up with the sewer piping. The inlet line should slope down toward the plant and the outlet line should slope down away from the plant. The plant should be level within one-half inch, edge to edge.

  • 3.

    Position inlet and outlet lines and make connections as necessary, depending upon the construction materials. The inlet line should be inserted and glued into the inlet elbow and the discharge line should be inserted and glued into the outlet coupling. Note: Open inspection port and make sure discharge tee assembly is level and centered in clarifier prior to attaching discharge piping. Fill the tank with water until water flows from the discharge before back-filling. Backfill around plant, up to the bottom of the discharge connections.

  • 4.

    Do not install the air pump(s) in a low lying area where water may accumulate. The air pump should be installed near the control panel and within one hundred feet of the tank. Air pump can be installed outdoors or in a clean, well ventilated area, such as a tool room, garage, etc. If the linear air pump is to be installed in an additional enclosure, the enclosure must be approved by Delta in writing.

  • 5.

    Mount the control panel in an area such that the alarm can be heard and be readily observed. A 3-wire grounded GFI circuit is required for safety. Install a disconnect switch near the panel to visually disconnect the control panel from the power source. All electrical work shall be done according to NEC and local code requirements. The control panel must be grounded. Connect the source ground wire to the ground location in the panel.

  • 6.

    The control panel is rated for indoor and outdoor use and contains a fuse or circuit breaker for the air pump. An electrical malfunction in the air pump or wiring to the air pump will cause the fuse to blow or circuit breaker to trip. The control panel also contains a pressure switch and visual and audible alarm. Loss of air pressure caused by the air pump system malfunction or a high water level in the treatment plant will cause the alarm to sound and light to illuminate.

  • 7.

    Attach control panel to suitable mounting surface using all four mounting holes on back of box. Use proper screws of sufficient length to insure a secure and permanent mounting.

  • 8.

    Control panel is rated for outdoor service; however, do not place it where it can be immersed in rising water or where run-off water such as from a roof will fall on it. Do not mount it where it is subject to wetting from sprinklers, hoses, etc.

  • 9.

    The control panel must never be connected to a circuit that is not properly grounded. Never connect the unit to a non-grounded circuit. If there is doubt, have a qualified electrician check for proper grounding. The control panel must be connected to a 20 amp maximum electric source equipped with a ground fault interrupter (GFI) circuit breaker. A standard circuit breaker can be replaced with a GFI circuit breaker which can be obtained from almost any store that sells electrical supplies.


  • 10.

    After the control panel is properly mounted, connect conduit and install wiring as shown on drawings bound herein.

  • 11.

    Install float switch wire from the control panel to the treatment plant. Wire can be direct burial type UF 600 volt or can be installed in schedule 40 PVC conduit. Use type THWN, 600 volt if installed in conduit. Wire must be buried in accordance with NEC table 300-5. If in doubt, bury 24 inches deep. Keep sufficient distance or depth from air line to avoid confusion of pipes or damage to wiring during installation or repair of air piping. Connect to the float switch normally open contacts using underground rated compound filled wire nuts. Float switch is not required when a dual pressure switch is utilized which detects high water conditions.

  • 12.

    Connect the pressure air tubing to the 1/8” barb-fitting in the air piping system. The air tubing should be protected by conduit as shown on drawing.

  • 13.

    Install 3/4” schedule 40-PVC piping between air pump and treatment unit. A minimum of 12 inches ground cover is recommended.

  • 14.

    Turn power on to control panel. Air pump should start.

  • 15.

    Check air piping joints for leakage using a soapy water solution. Repair if necessary and then carefully backfill air line and inlet and discharge piping and cover plant to grade level.

  • 16.

    Re-check water level in the tank.

  • 17.

    Plant is ready to receive incoming sewage. No special start-up procedures are required. The process is naturally occurring and does not require any special additives

  • 18.

    Test alarm circuit by momentarily squeezing air tubing and allowing air pressure to decrease. This should take a few minutes. Alarm should occur. Release air tubing and alarm should stop. Lift float in tank (if included) to horizontal position. Alarm should occur. Release float. Alarm should stop. The audible alarm can be turned off by flipping the toggle switch on the panel front door to the left.

  • 19.

    Close cover to control panel, and lock if necessary.

  • 20.

    In the event that a fuse blows, replace with time delay or slow blow, 125 volt minimum voltage rating and the same amp rating as the existing fuse.

  • 21.

    The distribution of air to all drop lines must be uniform. If the air flow is not evenly distributed, check the air pump or the main air line.

  • 22.

    Spend time with your customer whenever possible. Review operation instructions. Be sure that the customer has a manual to keep. This saves valuable time avoiding return visits.

  • 23.

    Retain these instructions for future reference.

  • 24.


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