Air in Salt Generator at Low RPM's Need Help

[Poolsean]

The cell is specifically designed to be mounted with the inlet and outlet at the bottom of the cell, so that the flow protection device (which is testing for continutity across two points at the top of the cell) can work properly. The problem is as you found out. Not enough flow to evacuate all the air, will not allow the system to come on. You may try starting the pump on a higher speed to get the air pockets out first, then having it switch to a lower speed, which should continue to keep the air pocket out.
Otherwise, you'll just have to run the system on something higher than the lowest speed.

The problem with mounting it differently from the instructions is the collection of hydrogen gases. If there is not enough flow to send this back to the pool and released to the atmosphere, it can collect at some point within your circulation system and damage equipment.

[traderfjp]

Yes. Running it at a higher speed does get most of the air out but on the lower speed the water level still falls over time and the flow sensor shut the unit down. I think I have a solution. I'm going to install a PVC valve on the outlet of the SWG to create some back flow pressure. When I run the pump on a higher speed I can turn the valve wide open and on lower speed I can throttle the valve down.