Installation Guide and Manual

12
Proper water conditions must be maintained to prevent damage to the water heater.
CONSTITUENT (MG/L)
MAXIMUM ALLOWABLE
CONCENTRATION
BETTER
BEST
Alkalinity
50
25
10
Calcium
25
5
0.5
Carbon Dioxide
0
0
0
Chlorine
100
15
1
Free Chlorine
1
1
0.05
Iron
0.2
0.1
0.01
Magnesium as Mg
0.5
0.1
0.1
Magnesium as Mn
0.1
0.1
0.1
Nitrate
25
25
10
Oxygen
2
1
0.1
Silica
15
10
1
Sodium
50
10
1
Sulfate
25
25
1
Total Dissolved Solids (TDS)*
200
100
5**
Total Hardness
25
10
1
pH
6.5 – 8.5
6.5 – 8.5
6.5 – 8.5
Turbidity (NTU)
5
5
1
* NOTE: Total dissolved solids
** NOTE: Do not reduce the TDS beyond this amount or the water will be too aggressive