Knurr CoolTrans 100 kW Bedienungsanleitung Seite 8

CoolTrans
Manual / Bedienungsanleitung
2.1 Water Quality Requirements
For safely operating the CoolTrans, the cooling water must be available at specified
water quantity, temperature and pressure. The water quality must comply
with VGB-R 455 P.
The requirements of the primary water quality are, apart from those data as specified in the Annex,
as follows:
In order to safeguard maximum service life of the system, the supplied cooling water must comply
with the VGB-Kühlwasser-Richtlinien (VGB-R 455 P) (VGB Cooling Water Guidelines VGB-R 455
P). The applied cooling water must be soft enough to prevent any depositing; however, it must not
be too soft since this might result in corroding the system.
The following table contains the most important impurifications as well as methods for their removal:
Impurification of the water
Mechanical impurification (dp > 0.8 mm)
Excess hardness
Moderate content of mechanical impurification and
hardeners
Moderate content of chemical impurification
Biological impurification (bacteria and algae)
It is recommended to meet the following hydrological data as far as possible:
Hydrological data
pH values
Free carbonic acid
Nitrates
Sulphates
Sulphides
Chlorides (at 25°C)
Ammonia
Iron
Manganese
Conductivity
Max. concentration of antifreezers (glycol)
)* The application of a dirt trap of an aperture size of < 0,8mm in the primary flow is generally
recommended in order to avoid probable disturbances in the plate heat exchanger.
We recommend a second dirt trap as a by-pass line for uninterruptible maintenance.
CoolTrans
not detectable
01.998.362.0 / Ausgabe f
Method of removal
Filtering of the water
Softening of the water by ion exchange
Addition of dispersion or stabilising
agents
Addition of passivation agents and
inhibitors
Addition of biocides
6 – 9
< 20
< 100
< 50
< 800
< 2
< 1.5
< 0.5
< 30
35%
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mg/l
mg/l
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S/cm