I have a vista 20p and a wireless receiver keypad. There are two wireless smoke detectors 5808w3 already installed years ago but I don’t remember how I programed them.

From what I’ve read, 5808w3 has to be installed to zone 9. Can I have Mutiple 5808w3 installed to zone 9 without overriding each other?

After installing is there a way to test all 3 of my 5808w3 to make sure they are all still connected to the Vista 20p (preferably without sending an alarm signal to central monitoring)?

Thank you.