Dantherm CDP 50 - Water Quality; Guideline Values for Chemicals; Guideline Values for Chlorine Production; Langelier Saturation Index Advice

48
EN
Water quality The correct combination of chemicals in an indoor swimming pool is crucial, both for the health
of users and for the inventory inside the pool room and the swimming pool’s technical room.
Insuciently treated water results in poor hygiene, while water that has been excessively treated
results in gases in the air that contain chlorine, which can irritate the eyes and cause breathing
diculties.
At the same time, the incorrect composition of chemical ingredients in the water can destroy all
of the inventory in a very short space of time, including the dehumidier and other equipment
that have been installed to process the air.
Shown below are the threshold values, which apply to products for indoor swimming pools in
accordance with EN/ISO 12944-2, protection class C4. These threshold values must be complied
with for the warranty to be valid.
When adding chemicals The following guideline values are applicable to swimming pools with the addition of chemicals.
Chemicals ppm
Free chlorine content 1.0-2.0
Combined chlorine content Max. 1/3 of free chlorine content
pH 7.2-7.6
Total alkalinity 80-150
Calcium hardness 250-450
Total dissolved solids < 2000
Sulphates < 360
Wit own production of
chlorine
The following guideline values are applicable to swimming pools with self-production of chlorine:
Chemicals ppm
Salt (NaCl) < 30,000
Total dissolved solids < 5500
pH 7.2-7.6
Total alkalinity 80-150
Calcium hardness 250-450
Sulphates < 360
Langelier Saturation index It is advisable to use the Langelier Saturation index to ensure that the combination of the
dierent water parameters is acceptable.
Contact Dantherm Air Handling A/S if necessary.
Ensure the chemistry of the water is correct