Lauda Integral T 1200 Operating Instructions Manual page 26

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
condenser 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
2-
Sulfates [SO ]
4
Hydrocarbonates [HCO
Total hardness
Hydrocarbonates [HCO
Conductivity
-
Chlorides (Cl )
2-
Sulfites [SO ]
3
Free chlorine gas (Cl
Nitrates (NO -)
3
Ammonia (NH )
3
Iron (Fe), dissolved
Manganese (Mn), dissolved
Aluminum (Al), dissolved
Free aggressive carbonic acid (CO
Hydrogen sulfide (H
Algae growth
Suspended matter
26
2-
-]/ sulfates [SO ]
3 4
-]
3
)
2
)
2
S)
2
Integral T process thermostats
7.5 – 9.0
< 70 mg/L
> 1.0
4.0 – 8.5 °dH
70 – 300 mg/L
10 - 500 μs/cm
< 50 mg/L
< 1 mg/L
< 1 mg/L
< 100 mg/L
< 2 mg/L
< 0.2 mg/L
< 0.1 mg/L
< 0.2 mg/L
< 5 mg/L
< 0.05 mg/L
Not permissible
Not permissible
Preparations
YAWE 0026 / 21/01/2019