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Millenium™ RO System by GE Osmonics
14693e - 31 Mar 03 4- 11 Routine Maintenance
4.3.1 Pre-Cleaning Preparation
There are two types of cleaners available, a low pH cleaner (Calcium/Iron removal) and a
high pH cleaner (Silt/Organics removal). GE Osmonics provides these cleaners in liquid
form. The low pH cleaner attacks mineral scale deposits such as calcium, magnesium
and iron build-up, and should be used first. The high pH cleaner will remove
accumulated silt and organic matter from the RO membrane.
CAUTION:
The different cleaners must not be mixed together. Introduce the low pH cleaner
first, thoroughly rinse the system, and then use the high pH cleaner.
WARNING:
The solution is a mild irritant to eyes and skin. It is recommended that protective
gloves and eye protection be worn when handling the cleaner. Neither respiratory
protection nor special ventilation are required.
Materials Required:
Liqui-Clean 403™ – (Low pH liquid) - GE Osmonics Part No. 1228653 (1 Gal)
Liqui-Clean 211™ – (High pH liquid) - GE Osmonics Part No. 1228791 (1 Gal)
• high and low pH cleaner
• 2 Gallons pretreated water
• clean wide mouth container with volume of 2 ½ gallon or more
• pH test strips
• product rinse line (clear hose with male QD fitting on one end, open on the other)
• “DO NOT USE” warning labels (not provided by Osmonics)
• cleaning / disinfect log sheets
• most current log sheets for water quality comparison
4.3.1.1 Pre-Cleaning Procedure
Read and understand instructions on cleaner container before beginning procedure.
1. Connect the water inlet line to the water supply, and the waste and product lines
to drain. Turn the RO unit and water supply on.
2. Establish a pre-cleaning % rejection, TDS and pH record on the cleaning disinfect
log sheet.
3. Prepare the cleaning solution by adding the amount of cleaner as specified on the
labeling to two gallons of pretreated or RO product water.