MIOX RIO-S Series, Инструкция по установке, эксплуатации и обслуживанию

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MIOX RIO-S Series Operators Manual
102-00130-D Page 68
Acid Washing Cell
Water with hardness of greater than 1 grain/gallon (17.1 mg/L as CaCO3) feeding the MIOX
generator will coat the plates within the cell with solid impurities such as calcium carbonate.
Calcium carbonate (CaCO3) is usually white in color but can be other colors depending on
dissolved salts in the water. If there is a problem, CaCO3 will most likely be found on the
cathode side of the cell. At first, CaCO3 will form a thin hard film and over time, a coating
within the cell will grow and flakes will break off and effect system performance. CaCO3 will
obstruct, or “blind” the current path and cause a decrease in mixed oxidant (chlorine)
production. If uncorrected, the cell can be damaged.
Caution should be taken to prevent accidental exposure of brine, acid, and/or
oxidant to skin or eyes when servicing the unit. If this occurs, rinse affected
areas with water and apply first aid as needed.
Actions
1. Acid washing the cell according to the procedure written in the MIOX RIO-S Acid
Wash Procedure documentation (PN: 102-00012).
2. Ensure that the water supplied to the cell meets hardness and purity requirements
under Appendix A.
3. Ensure that the salt supplied to the cell meets with calcium and magnesium
requirements under Appendix B.
Oxidant Demand Testing
The oxidant demand of water is a measure of the amount of oxidant needed to properly
disinfect water. This value is extremely important for accurately sizing and maintaining
MIOX equipment. Oxidant demand is determined by adding oxidants in several
concentrations to raw untreated (sample) water and measuring the FAC over time.
Equipment Needed
 100 mL graduated cylinder
 Four (4) 100 mL glass jars with lids
 Pipette that can accurately measure 0.1 mL increments
 Chlorine test like (i.e. DPD, Color Wheel, Colorimeter, or AccuVac)
 Timer or watch
 Calculator
Identify Starting Range
The initial oxidant demand test should use a 5 ppm dose to identify the correct starting
range. If a 5 ppm dose is consumed in less than 30 minutes, the demand of the water is
greater than 5 ppm, and the dose rates of 10, 15, and 20 ppm should be used for testing.
Conversely, if the 5 ppm dose is only moderately decreased in 30 minutes testing should be
performed with 1, 3, and 5 ppm doses.
Safety