Control panels engineered and manufactured by Legacy Controls for Hydro-Action® wastewater treatment systems. Find the part number on the data plate inside the panel door.
Every Legacy-built Hydro-Action® control panel is documented here: operation manuals, specification sheets, quick start guides and troubleshooting guides, current as published.
Each panel also carries a code inside its door that opens the same documents directly. Use this page when the panel is not in front of you, or when the label cannot be read.
These panels are supported by AKHA Manufacturing, LLC, not by Legacy Controls. All technical support, warranty claims, service questions and alarm callbacks go to AKHA. Each panel's own documents name the contact. Legacy Controls does not accept end-user or installer enquiries for this product line.
Select a part number for that panel's full document set, safety notice and specifications.
Nitrogen Reduction Control Panel — timer-based process control with air pressure and recirculation supervision, and a high water alarm that never interrupts treatment. 120 VAC.
Quick start · Manual · Spec · Troubleshooting
Nitrogen reduction · PLC dripPLC Drip Nitrogen Reduction Control Panel — Siemens LOGO! control running the dose schedule, filter backflush, drip field flush and override counting across four motors. 120 V, two feeds.
Manual · Spec · Troubleshooting
Gravity · UV · cellular alarmGravity UV Aeration Control Panel — continuous aeration with UV lamp supervision and high-water annunciation, plus a factory-integrated cellular alarm that sends SMS to up to three numbers. 120 V, two feeds.
Quick start · Manual · Spec · Troubleshooting
NPDES off-lot · UVAerobic Treatment Control Panel — demand dose with UV disinfection for off-lot discharge. Pump lockout on air loss or UV fault. Two 120 V feeds.
Manual · Spec
On-lot spray · UVSpray Irrigation Control Panel — timed dosing with UV disinfection and UV lamp supervision. Dual feed, 120 V only.
Quick start · Manual · Spec · Troubleshooting
On-lot spray 240 V · UVAerobic Treatment Control Panel — time-based dosing with UV disinfection. 240 V spray/dose pump circuit with a separate 120 V control feed that stays energized when the main is off.
Manual · Spec
Two part numbers share the title Aerobic Treatment Control Panel and are different panels — check the voltage and dose type on the label above, or read the part number off the data plate.