WDT GRANUDOS Flex-CPR Touch XL, Operating Instructions Manual

Page: 31 / 82

Dosing unit GRANUDOS Type Flex-CPR Touch XL,
Type Flex-Touch and Type Flex-S5
Index: 01 Change date: 11/10/2023 OI No.: BA SW 022-01 Granudos Flex Dosiereinheit EN.docx Page 31 of 68
CAUTION!
During installation, the locally applicable provisions must be observed. In Germany, for ex-
ample, DIN 19643.
During all installation work, the valves must be closed and the lines depressurised to prevent
injury and damage.
Pressure conditions
When connecting the GRANUDOS to the swimming pool circulation, particular attention must be paid
to the pressure conditions. The swimming pool circulation should have no impact on the supply of
dissolving water to the GRANUDOS.
The table shows the maximum possible counter-pressures at the dosing point at the prevailing inlet
pressure. The values in the table refer to the flow pressure, i.e., the dynamic pressure in the line.
Conditions of use:
The respective pressure values are measured at the GRANUDOS, without the inserted hole washer.
In addition, pressure loss in the piping must be taken into account; therefore, pressure loss should be
kept at a minimum.
The GRANUDOS’s inlet and drain are equipped with hose connections where the pressure during op-
eration can be measured by means of the included manometer. If the counter-pressure exceeds 1.5
bar, a stronger pump can be used; please consult with WDT.
4.4.1 Installation of the dissolving and measuring water supply
ATTENTION!
Before beginning any connection works, ensure that all of the ball valves on the measuring
cell block are closed.
The dissolving and measuring water supply for the GRANUDOS should be separated from the swim-
ming pool filter circuit so that the swimming pool circuit does not affect the uninterrupted supply with
dissolving water
Flow through the pool
Only a proper pool flow can achieve a satisfactory control of the auxiliary hygiene parameters, i.e., free
chlorine, pH value and redox potential. The dosed chemicals must reach all areas of the pool within a
short time. Even under stress, the concentrations measured in different areas of the pool must be
approximately the same.
With an inlet pressure of:

possible counter-pressure:
0.3 bar

1.0 bar
0.4 bar

1.1 bar
0.5 bar

1.1 bar
0.6 bar

1.2 bar
0.7 bar

1.3 bar
0.8 bar

1.3 bar
0.9 bar

1.4 bar
1.0 bar

1.4 bar
1.1 bar

1.5 bar
1.2 bar

1.5 bar