Bosch CA Series - Water Quality Table

Installation, Operation, and Maintenance Manual
CA Series Heat Pumps - 8733851021 (2025/04) US
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13 Water Quality Table
Water Quality
Potential Problem Water Characteristic
Acceptable Value
Copper Cupro-Nickel
pH (Acidity/Alkalinity) 7-9 7-9
Scaling
Hardness (CaCO3, MgCO3) < 350 ppm < 350 ppm
Ryznar Stability Index 6.0 - 7.5 6.0 - 7.5
Langelier Saturation Index -0.5 - +0.5 -0.5 - +0.5
Corrosion
Hydrogen Sulde (H2S) < 0.5 ppm * 10-50 ppm
Sulfates < 125 ppm < 125 ppm
Chlorine < 0.5 ppm < 0.5 ppm
Chlorides < 20 ppm < 150 ppm
Carbon Dioxide < 50 ppm < 50 ppm
Ammonia < 2 ppm < 2 ppm
Ammonia Chloride < 0.5 ppm < 0.5 ppm
Ammonia Nitrate < 0.5 ppm < 0.5 ppm
Ammonia Hydroxide < 0.5 ppm < 0.5 ppm
Ammonia Sulfate < 0.5 ppm < 0.5 ppm
Dissolved Solids < 1,000 ppm < 1,500 ppm
Iron Fouling
Iron (Fe2+ Iron Bacteria Potential) < 0.2 ppm < 0.2 ppm
Iron Oxide < 1 ppm < 1 ppm
Erosion
Suspended Solids < 10 ppm, < 600 µm size ** < 10 ppm, < 600 µm size **
Maximum Water Velocity 6 ft/sec 6 ft/sec
* No “rotten egg” smell present at < 0.5 ppm H2S.
** Equivalent to 30 mesh strainer
Table 5