4-12
387366-389 Operator Manual Operator Instructions
The control system will automatically flush the steam generator if
power is on; for this reason it is recommended that power remain on
continuously.
See Water Utility Requirements for Stainless Steel generators.
Table 4-1. Required Feed Water Quality for Carbon Steel
Steam Generators
Condition Nominal
Recommended
Maximum
Recommended
Temperature As Supplied 140° F (60° C)
Total Hardness as CaCO3* 0-17 mg/L 130 mg/L
Total Dissolved Solids 50-150 mg/L 250 mg/L
Total Alkalinity as CaCO3 50-100 mg/L 180 mg/L
pH 6.8 - 7.5 6.5 - 8.5
Total Silica 0.1 - 1.0 mg/L 2.5 mg/L
Resistivity - ohms/cm 2000-6000 26,000
*17.1 mg/L = 1 grain hardness
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