MIOX AE Series Operators Manual
102-00085-E
Page
50
Appendix A - Water Quality Guidelines
Knowing what to look for when sizing a system will help remove hidden surprises after installation. Most
of the items on the following list will be below the limits but should be checked nonetheless.
Concentrations or measurements in brine feed water and/or treated water that are less than the stated
limits are not anticipated to have the stated effect. These factors can affect the oxidant demand of each
individual water system, the oxidant production of the MIOX system, or the life of the cell itself. It is
important to use “worst case” measures since water quality can vary from season to season.
MEASURE
LIMIT
WHAT IS IMPACTED
Oxidant
Demand
Chlorine
Production
Cell Life
Total Hardness **
grains/gal
(or mg/L)
<1 grain
(<17.1
mg/L)
• •
Iron (Fe) **†
mg/L
<1 mg/L **
•
•
Manganese (Mn)
µg/L
<50 µg/L
**
• • •
Fluoride (Fl)
mg/L <1
mg/L
•
Silica (SiO
2
)
mg/L <20
mg/L
•
•
Bromide
mg/L <50
mg/L
•
Cyanide
mg/L <1
mg/L
•
Lead (Pb)
mg/L <2
mg/L
•
Dissolved Sulfides (as
H
2
S)
mg/L *** •
Ammonia Nitrogen
(NH
3
-N)
mg/L *** •
Organic Nitrogen
(Org-N)
mg/L *** •
Total Organic Carbon
(TOC)
mg/L *** •
pH
- 5-9 • •
Water Temperature
Range ^
°F (or °C)
55-75 °F
(10-27°C)
• •
**Caution: water softeners will remove these components up to a limit. See references to maximum
ferrous iron and manganese in water softener documentation. Total hardness affects cell life only in that
higher hardness requires acid washing to remove carbonate deposits from the cell. Use of water
softened to < 1 grain hardness should not require acid washing of the cell.
*** Oxidant demand is affected by any level of H2S, ammonia or organic nitrogen, or TOC.
† Iron may deposit Fe(OH)3 on the anode, causing an electrical “blind”, which would increase the brine
proportion pump signal voltage (brine proportion pump speed) needed for the system to reach the
operating window. Chlorine production would remain the same, but salt conversion efficiency will
decrease. The same effect is true of silica on the cathode.
^ The system will operate with water temperatures outside this range; however, there will be a
performance change. Follow the system specifications for absolute limits.