How to use it? I suggest you find someone to teach you on the spot. It's unclear here. You can find an equipment installation manufacturer to teach you, or you can find an electrophoretic coating supplier to teach you, and the pretreatment raw material supplier will also teach you.
Simply put, water has one inlet and water has two outlets. One of the two outlets needs deionized water; The other is sewage, which is water with high ion content.
Generally, there are three thick ones erected, one filled with quartz sand, one filled with activated carbon and one filled with resin. These three substances are used to remove particles and impurities in water and soften water quality. There are only two.
The small iron that stands up is a filter with a filter bag inside.
Three white ones are reverse osmosis devices.
This is what it does.
The next step is to learn how to open and close these valves. The pipeline design of each manufacturer is slightly different, so I won't tell you how to open and close it here.
Ask someone else.