Labconco WaterPr RO Systems 90750 Series - Manuel (Page 29)

Chapter 5: Maintaining Your WaterPro RO System
25
Original Instructions
Sanitization
Sanitization is necessary when the RO element or storage tank become biologically fouled.
Biological fouling of the RO is an obstruction due to living or dead bacteria on the membrane or
tank surface. This may occur if the RO is left stagnant without flushing for more than a week.
If biological fouling of the membrane occurs, the unit should be sanitized with 0.1% (wt/wt)
formaldehyde as follows:
1. Collect approximately 4 liters of RO purified water in a container and set aside.
CAUTION: Use only chlorine-free water. Use of chlorinated tap water will
degrade and destroy the RO membrane.
ATTENTION : Utilisez uniquement de l’eau sans chlore. L’utilisation d’eau
chlorée va dégrader la membrane d’osmose inverse.
2. Shut off the feed water valve. Relieve the water pressure in the unit by opening the
dispense valve (dispense gun, if installed) and directing the water to drain.
3. Disconnect the unit by unplugging it from the outlet.
4. Remove both 20" prefilter and 20" carbon/prefilter cartridges. Do not remove RO
membrane.
5. Carefully wash inside the prefilter bowl, carbon/prefilter bowl and storage tank with liquid
detergent using a clean sponge or cloth. Rinse out the bowls several times to remove any
residue.
6. Prepare 0.1% formaldehyde in the RO purified water collected in Step 1.
CAUTION: Prepare and handle solutions in well-ventilated areas. Wear
protective clothing, gloves and eye protection. Dispose of excess or spillage
properly.
ATTENTION : Préparez et manipulez les solutions dans des zones bien
ventilées. Portez des vêtements de protection ainsi que des gants et des lunettes
de protection. Disposez de solutions excès ou d’écoulement des solutions d’une
manière dûment autorisée.
7. Install a new 20" prefilter cartridge, catalog number 9021000 in the empty, clean 20" bowl.
8. Fill the carbon/prefilter bowl with the 0.1% formaldehyde.
9. Reinstall the bowls in their correct position.
10. Plug the unit into the electrical outlet. Reopen the feed water valve.
11. Start the RO unit with the dispense valve open. Allow the unit to run for five minutes.
!
!