B,
It really depends on how your pool equipment is plumbed and what mode your automation is in..
If you are in the Spa mode, then the normal operation is to NOT overflow into the pool.
If you are in the Pool mode, most equipment pads have something called the make-up valve, which can be used to control the amount of water going into the spa.
Tell us more about what you are trying to do and show us a couple of pics of your equipment pad showing the area around the automated Return valve.
Thanks,
Jim R.