Conel CLEAR 2.0 RD - Backwash

Hello,
I hope you can help.
Since last year we have had a new building and a water station from Conel, CLEAR 2.0 RD. Unfortunately, I never received an introduction to the device. Just this week the plumbing company came and explained to me upon request that I have to perform a flushing once a year.
Today I dared to try it. However, I have questions for those who have the same or a similar station.
I turn the valve at the bottom practically one full 360-degree turn until it clicks back into place. During this time, a lot of water flows with strong pressure. I did this twice. Is that all there is to it? Or do you have to open it, wait until no more water comes out, and then turn it back until it clicks into place?
Furthermore, the system also has a pressure measurement. My value is currently below the green area. Do I have to bring it back into the green, or does that happen by itself?
Thank you for your support.

One turn is enough.
You won't get it empty ;-)

Hello,

I'm bringing up the topic again. We have the same filter, and I wanted to flush it for the first time today. But I just can't get the "manual flush wheel" to move. I then tried carefully with a bit more force, but nothing happens. Is it really stiff and I can apply force without worry, or is there a trick to it?

Thanks for your help

Hello, were you able to solve the problem with turning? My wheel is also extremely tight!

With some back and forth wiggling and considerable force, I was able to turn it in one direction, but not all the way around. Just before the full rotation, it locked up again. But the way back went all the way to the starting position. I have done this twice in a row now and it hasn't changed. I have now decided to do this monthly. Maybe it will flush itself free over time and eventually work normally again. But presumably, the combination of rather hard water and not flushing for a longer period is anything but ideal.