HP Modular Cooling System manual Hydrological data Acceptable range, Csb

Hydrological data	Acceptable range
Free carbonic acid	8–15 mg/dm3
Accompanying carbonic acid	8–15 mg/dm3
Corrosive carbonic acid	0 mg/dm3
Sulphides	Free
Oxygen	< 10 mg/dm3
Chloride ions	< 50 mg/dm3
Sulphate ions	< 250 mg/dm3
Nitrates and nitrites	< 10 mg/dm3
CSB	< 7 mg/dm3
Ammonia	< 5 mg/dm3
Iron	< 0, 2 mg/dm3
Manganese	< 0, 2 mg/dm3
Conductivity	< 2200 µS/cm
Residue on evaporation	< 500 mg/dm3
Potassium permanganate consumption	< 25 mg/dm3
Suspended matter	< 3 mg/dm3
Particular size range filtration	> 3 < 15 mg/dm3 part flow purification recommended
recommendations	> 15 mg/dm3 continuous purification recommended

Closed-loop water specifications	Raw water	Treated water system
pH	6.5–9.5	8.0–10.0
Specific conductance at 25°C	10–1,000 ∝mhos	10–4,500 ∝mhos
"M" Alkalinity (CaCO3)	20–300 ppm	100–1,000 ppm
Sulfur (SO4)	0–150 ppm	0–150 ppm
Chloride (Cl)	0–150 ppm	0–150 ppm
Hardness (CaCO3)	0–350 ppm	0–350 ppm
Calcium hardness (CaCO3)	0–200 ppm	0–200 ppm
Magnesium hardness (CaCO3)	0–150 ppm	0–150 ppm
Copper (Cu)	< 0.10 ppm	< 0.20 ppm
Iron (Fe)	< 3.0 ppm	< 3.0 ppm
Aluminum (Al)	0.5 ppm maximum	0.5 ppm maximum
Sodium (Na)	0–1,000 ppm	0–1,000 ppm
Silica (SiO2)	0–150 ppm	0–150 ppm
Zinc (Zn)	1.0 ppm maximum	1.0 ppm maximum
Manganese (Mn)	0.1 ppm maximum	0.1 ppm maximum
Phosphate Ortho- (PO4)	3 ppm	3 ppm
Nitrite (NO2)	700–1,200 ppm	700–1,200 ppm

Water quality and leveling requirements, and condensation management 65