GRANUDOS 45/100 PLUS V70 Touch
Index: 03
Change date: 25.04.2018
Operating instructions no.: BA SW 001-03 Granudos 45-100 PL V70T.docx
Page 17 of 92
The dosing performance, like that for chlorine, is set in the menu point
Menu
Settings .
Use acid based on 37-50% sulphuric acid as pH reducer. Concentrated nitric acid
destroys the hose pump - dilute to below 10%. Sodium bisulphate "dry acid"
solutions should not have concentrations higher than 20% (corresponds to 10%
sulphuric acid). It must be considered whether this acid performance is sufficient
for neutralisation.
In special cases, e.g. when water is very hard and/or has a high pH value and/or a
very high dosing performance is required, it is recommended to use nitric acid
instead of sulphuric acid in order to prevent possible formation of gypsum residues
due to high sulphate concentrations in the buffer tank.
CAUTION !
With a hydrochloric acid concentration of more than 10%, a Viton
hose must be inserted in the peristaltic pump! This is resistant up
to a maximum of 33% acid content. This hose must be replaced
every 6 months!
3.2.6
Control (series)
Control (GRANUDOS PLUS V70 Touch)
The controller is located in a dust-proof and splash-water proof housing (protection
type IP 54). External switches and remote fault messages are connected in the
bottom part of the housing.
The micro-processor-supported controller of the GRANUDOS PLUS V70 Touch
can be simply and consistently operated by using the 7“ Touch display.
Showing the functions in an active flow diagram provides direct information on
operating states and faults.
The start display:
Figure 7, Start display
