Operation
49 | 76
7.7
Determining and entering the water hardness
7.7.1
Water test kit
The water test kit is designed for the determination of the water hardness in °dH or in °f. The
units mmol/l and mol/m³ can be determined from °f.
No.
Description
No.
Description
1
Test tube
2
Titration solution
7.7.2
Taking a water sample
NOTE:
If the flow rate is too low during the sampling, the result will be falsified.
● The system will be programmed with incorrect values for the raw water hardness.
● The required soft water value will not be attained.
► Fully open the water withdrawal point for cold water or the sampling valve. A flow
rate between 0.4 m³/h and 0.6 m³/h must be achieved.
► When taking a soft water sample, the flow rate can be read in information level 2.
1.
Open a water withdrawal point for cold water or a sampling valve at the connection
block.
a
In order to take a raw water sample, use a water withdrawal point for cold water
upstream of the system or the raw water sampling valve.
b
In order to take a soft water sample, use a water withdrawal point for cold water
downstream of the system or the soft water sampling valve.
NOTE:
The water exits the sampling valves at high pressure.
● The product and its vicinity might be sprinkled with splash water.
► Keep a sufficiently dimensioned collecting vessel, e.g. a bucket with
a volume of least 5 l, handy.
2
1
