Orenco Systems®• 800-348-9843 • +1 541-459-4449 • www.orenco.comNIM-EPS-OM-1
Rev. 1 © 03/20
Page 8 of 12
O&M Manual: Orenco®Prelos™Processors
Part 2: Maintenance, cont.
Routine Maintenance, cont.
Step 5c: Clean out the pump screen and inspect the pump.
• If necessary, replace the pump screen.
• Confirm there are no nicks in the pump cord.
• Confirm there is no swelling in the pump cord.
• Confirm the pump is securely attached to the hose.
Step 5d: Confirm the hose is in good condition.
• Confirm the hose has not stretched.
• Confirm the hose is not torn or worn.
Step 5e: Confirm both sections of the HDA are in good condition.
• Confirm the HDA’s line-check valve functions properly.
• Confirm the HDA’s anti-siphon valve functions properly.
Step 5f: Perform any necessary preventative maintenance on the
HDA, pump, and pump cord.
Step 5g: Lower the pump into the vault and recouple the HDA.
• Confirm the HDA is properly installed and fully seated.
• Confirm the pump is not resting on the floor of the vault.
Step 6: Wash the tarp off over the access riser.
Step 7: Close and secure all access to the Prelos Processor if you
are not immediately going to perform a tank pump-out.
Pumping the Tank
If the tank requires pumping, follow the steps below to assure the
best results.
IMPORTANT:
•Wear appropriate PPE while performing start-up or O&M work
on the Prelos Processor.
•Without proper antibuoyancy measures in place, pumping the
tank under conditions of high groundwater can result in the
tank “floating” out of the ground.
•Don’t pump the tank dry with extreme high groundwater
present.
•For emergency situations during extreme high groundwater
events, always consult with the pumper.
Step 1: Open the control panel’s door.
Step 2: Turn off the circuit breakers for panel power, float switch/
Biotube filter assembly, and pump.
Step 3: Lay out a tarp next to the access riser.
Pumping the Tank, cont.
Step 4: Remove the access lid and set the lid bolts aside.
• Don’t lose the lid bolts.
Step 5: Remove the float switch/Biotube filter assembly and lay it
on the tarp.
Step 6: Remove the filter’s cover plate and mounting hardware and
set them aside on the tarp.
Step 7: Hold the assembly on the inlet side of the access riser.
Step 8: Use a hose and sprayer to clean off the filter and float
switches.
• Allow debris and cleaning water to flow back into the inlet side
of the tank.
Step 9: Remove the cleaned filter from the Processor and lay it on
the tarp.
Step 10: Reinstall the filter’s cover plate and mounting hardware.
Step 11: Remove the HDA and pump.
IMPORTANT: DON’T raise or lower the pump by the
power cord! This can damage the pump and void the
pump warranty.
• Inspect the pump and clean the screen, if necessary.
• When finished, place them on the tarp.
Step 12: Remove the pump vault from the Processor.
• Inspect the pump vault and clean it, if necessary.
• When finished, place the vault on the tarp.
Step 13: Pump out both sides of the tank.
Step 14: Reinstall the pump vault into the Processor.
Step 15: Lower the pump into the vault and recouple the HDA.
IMPORTANT: DON’T raise or lower the pump by the
power cord! This can damage the pump and void the
pump warranty.
• Confirm the HDA is properly installed and fully seated.
• Confirm the pump is not resting on the floor of the vault.
Step 16: Reinstall the float switch/Biotube filter assembly into the
pump vault.
• Make sure the filter seats properly in the pump vault.
Step 17: Check that the ClickTight connections are all secure.
Step 18: Close and secure all access to the Prelos Processor.
