Granudos 45/100-CPR Touch XL + Touch + S5
Dosing unit
Index: 02
Date modified: 06/06/2019
OI No.: BA SW 003-02 Granudos 45-100 CPR Touch+Touch+S5-Dosiereinheit EN.docx Page 28 of 58
When connecting the GRANUDOS 45/100 to the water circulation, special attention must
be paid to the pressure conditions to avoid an impact of the swimming pool circulation on
the uninterrupted supply with dissolving water.
The GRANUDOS was tested under the following conditions:
At inlet pressure 1.2 barg
possible counter-pressure 1.4 barg
0.6 barg
1.1 barg
0.3 barg
0.9 barg
The respective pressure values are listed on the dosing device, without the inserted orifice
plate. In addition, pressure loss in the piping must be taken into account; therefore, pressure
loss should be kept at a minimum. The dosing device's inlet and drain are equipped with hose
connections where the pressure during operation can be measured by means of the included
manometer. In case of a higher counter-pressure, a stronger pump may be used.
ATTENTION!
Before beginning any connection works, ensure that all of the ball
valves are closed.
4.4.1
Installation of the dissolving and measuring water supply
The dissolving and measuring water supply for the GRANUDOS 45/100 should be
separated from the swimming pool filter circuit so that the swimming pool circuit does not
affect the uninterrupted supply with dissolving water.
Flow
Only a proper basin flow can achieve a satisfactory control of the auxiliary hygiene
parameters, i.e., free chlorine, pH value and redox voltage. The dosed chemicals must reach
all areas of the basin within a short time. Even under stress, the concentrations measured in
different areas of the basin must be approximately the same.
Water withdrawal
A partial flow of the dissolving water is used as measuring water. (GRANUDOS
Touch
does
not have a measuring water device; this has no effect on the connection of the devices).
Choosing the correct measuring water withdrawal point is crucial for the effectiveness of the
measuring and control technology. If possible, the measuring water should be identical to the
basin water; it should be possible to detect changes to the water quality in the basin as quickly
as possible by metrological means. This is the only way to ensure a quick compensation of
changes in the basin water quality by means of additional chemical dosing. The optimal
withdrawal point can be located by measuring the chlorine concentration at different points
(e.g., downstream of the circulating pumps, mixed water, etc.) and comparison with the
values from the basin water in various operating conditions.
ATTENTION!
No chemicals may be dosed upstream of the measuring water
withdrawal point. This would distort the measuring results.
If the basin water is conducted through an overflow gutter and an compensation basin (splash
water basin) that is also used for the freshwater feed-in, only a sampling of the measuring
water directly from the swimming pool basin will lead to satisfactory
measuring and control results.
In new systems, measuring water must be withdrawn directly from the basin, in accordance
with DIN 19643!