Water requirements
Table 14: Chilled water requirements
TendencyItem Unit Allowable value
Corrosion Deposition
PH value (25°C) 7.5 to 8.0 X
SO4- ppm <100 X
HCO3- /SO4-- ppm >1.0 X
Cl- ppm <50 X
PO4 ppm <2.0 X
NH3 ppm <0.5 X
Free Chlorine ppm <0.5 X
Fe+++ ppm <0.5 X
Mn++ ppm <0.05 X
CO2 ppm <10 X
H2S ppm <50 X
Temperature °C <65 X X
Oxygen content pm <0.1 X
Total hardness dH 4.8 to 8.5 X
Note:
• Items with corrosion tendency indicate that water quality that exceeds the allowable
value for a long time may cause corrosion-related leakage of the heat exchanger and
breakdown.
• Items with deposition tendency indicate that water quality that exceeds the allowable
value for a long time may cause serious incrustation of the heat exchanger and affect heat
transfer efficiency, resulting in a low efficiency of cooling or heating.
Sound data
Contact your local Johnson Controls representative for details about sound power and sound
pressure level data, ISO 9614.
89YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump
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