Manual Cell Cleaning - Innowater SMC Serie Manual Del Usuario

8. MANUAL CELL CLEANING

Your SMC chlorinator is provided with a self-cleaning polarity change system that in
normal conditions eliminates maintenance work. However, in exceptional cases,
when the calcium concentration is very high (very hard water), polarity change may
not be enough to completely eliminate the calcium build up. Visually inspect the cell
regularly to detect the presence of calcium and, if necessary, clean the cell. Let the
cell dry completely during one or more days for the calcium build up to detach by
itself. You can help this by slightly knocking the cell but do not introduce any element
that could scratch the electrodes. Their coating is fragile. You can also use a water
jet. DO NOT USE ANY METALLIC OR STABBING ELEMENT TO SCRATCH THE
ELECTRODES.
If you are not able to remove the calcium build up in the way described, proceed as
follows:
1 Turn off the pump and the chlorinator.
2 Disconnect the DC cable for the cell, unscrew the thread lock and extract the cell.
3 Immerse the electrodes in a hydrochloric acid solution made from 1 part of acid
(HCl 30%) and 9 parts of water. Do not immerse the rods or the cap of the cell. The
hydrochloric acid will react with the calcium and will dissolve it producing gas.
4 As soon as the calcium build up dissolves, rinse the cell immediately with
freshwater, dry the terminal area properly and reinstall the cell in its housing.
Never leave the cell in the acid solution for more than 5 min. Do
not scratch the electrodes with metal objects. For safety reasons,
always add the acid into the water and never inversely.
SMC 28