Labconco WaterPro RO 90750 Series, User Manual, Page: 31 / 48

Chapter 5: Maintaining Your WaterPro RO System
27
Original Instructions
6. Fill the carbon/prefilter bowl approximately ¾ full with the cleaning solution.
7. Reinstall the bowl.
8. Open the feed water valve.
9. Plug the unit into an electrical outlet, activate the unit and allow it to operate for 5 minutes.
10. Disconnect the unit from the electrical outlet and allow the membrane to soak for at least 2
hours.
11. Relieve the pressure in the system by connecting unit to an electrical outlet and pressing
the dispense button.
CAUTION: Do not attempt to remove the acid-filled bowls when the system is
pressurized
.
ATTENTION : N’essayez pas d’enlever les bols remplis d’acide lorsque le
système est sous pression.
12. Carefully remove the prefilter bowl and dispose of the water appropriately.
CAUTION: The water in the bowl contains cleaning solution. Handle and
dispose of properly
.
ATTENTION : L’eau dans le bol contient de la solution de nettoyage.
Manipulez-le et éliminez-le d’une manière dûment autorisée.
13. Install a new prefilter (first bowl from right) and carbon/prefilter (second bowl) cartridges.
14. Connect a hose to the dispensing valve and route to drain. Activate the unit by connecting
the unit to an electrical outlet. Set time dispense for 60 minutes and direct water to drain.
15. At the end of the hour, set off feed-water valve and release the pressure by pressing the
dispense button.
16. Start the unit. The RO module is now ready for normal operation.
Organic Fouling
Organic fouling of the membrane can be caused by silt, bacterial slime, or any other organic
materials.
The following recommended cleaners may be used:

Sodium hydroxide 0.5%

Sodium dodecyl sulfate 0.1% (Adjust pH to 11.5 with HC1, if necessary)

Trisodium phosphate, 1%

Sodium tri-polyphosphate, 1%

Tetra sodium EDTA, 1% (Adjust pH to 11.5 with HC1, if necessary)
For cleaning procedure, follow steps 1 through 17 under Inorganic Fouling.
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