Lauda Viscotemp 15 G Operation Manual page 37

Suitable cooling water quality
Specification
pH – value
Hydrocarbonates [HCO
-
Chlorides (Cl )
2-
Sulfates [SO ]
4
Hydrocarbonates [HCO
Total hardness
Conductivity
Sulfites [SO 2- ]
3
Free chlorine gas (Cl )
2
Nitrates (NO -)
3
Ammonia (NH )
3
Iron (Fe), dissolved
Manganese (Mn), dissolved
Aluminum (Al), dissolved
Free aggressive carbonic acid (CO
Hydrogen sulfide (H S)
2
Algae growth
Suspended matter
Risk to the environment due to oil contamination of the cooling water circuit
With a leaky condenser there is the danger that refrigerating machine oil from the refrigerant circuit of the cooling thermo-
stat can pass into the cooling water.
Follow all the legal requirements and the regulations of the water supply utility which apply at the point of use.
Water pollution due to leakage
To avoid pollution due to a leak in the cooling water system it is recommended that a leakage-water detector with a water
cut-off is installed.
Servicing intervals
Follow the information for cleaning and decalcifying the cooling water circuit ( 8.3.4.2).
09/2021
-]
3
-] / sulfates [SO 2- ]
3 4
)
2
Value and Unit
7.5 – 9.0
70 – 300 mg/L
< 50 mg/L
< 70 mg/L
> 1.0
4.0 – 8.5 °dH
30 - 500 μS/cm
< 1 mg/L
< 0.5 mg/L
< 100 mg/L
Not permissible
< 0.2 mg/L
< 0.05 mg/L
< 0.2 mg/L
Not permissible
Not permissible
Not permissible
Not permissible
ECO Gold 37 / 134