Lauda RP 3050 C, Руководство по эксплуатации

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Proline Kryomats
36
Preparation
YAUE0007 / 10/2/2018
b) Cooling water
Certain requirements are placed on the cooling water with regard to purity. Depending on the
cooling water contamination, a suitable method of purification and/or treatment of the water must
be employed. The heat exchanger and the complete cooling water circuit can become blocked,
damaged and leaky due to unsuitable cooling water. Extensive consequential damage may arise
on the whole cooling circuit. The cooling water quality depends on local conditions. If a fault or
damage occurs due to unsuitable water quality, it is not covered by our guarantee.
Important: Danger of corrosion of the cooling water circuit due to water of unsuitable quality.

Free chlorine (e.g. from disinfectants) and water containing chlorine lead to pitting in the
cooling water circuit.

Distilled, deionized or demineralized water is unsuitable due to its corrosive properties and
leads to corrosion in the cooling water circuit.

Seawater is unsuitable due to its corrosive properties and leads to corrosion in the cooling
water circuit.

Water containing iron or iron particles leads to rust formation in the cooling water circuit.

Due to the high lime content hard water is not suitable for cooling and leads to calcification in
the cooling water circuit.

Cooling water with suspended matter is not suitable.

Untreated and unpurified river or cooling tower water is not suitable due to its microbiological
content (bacteria), which can become deposited in the cooling water circuit.

Putrid water is not suitable.
Suitable cooling water quality
pH
– value
7.5
– 9.0
Sulfates [SO
4
2-
] < 70 mg/L
Hydrocarbonates [HCO
3
-]/ sulfates [SO
4
2-
] > 1.0
Total hardness 4.0
– 8.5 °dH
Hydrocarbonates [HCO
3
-] 70
– 300 mg/L
Conductivity 10 -
500 μs/cm
Chlorides (Cl
-
) < 50 mg/L
Sulfites [SO
3
2-
] < 1 mg/L
Free chlorine gas (Cl
2
) < 1 mg/L
Nitrates (NO
3
-) < 100 mg/L
Ammonia (NH
3
) < 2 mg/L
Iron (Fe), dissolved < 0.2 mg/L
Manganese (Mn), dissolved < 0.1 mg/L
Aluminum (Al), dissolved < 0.2 mg/L
Free aggressive carbonic acid (CO
2
) < 5 mg/L
Hydrogen sulfide (H
2
S) < 0.05 mg/L
Algae growth Not permissible
Suspended matter Not permissible