ATO

[whatcaneyedo]

Originally Posted by Wayne

What kind of failures might occur with the contollers? Do they have backup safetys?

They can be as simple or as complicated as you want. I was able to pick up a Tunze ATO used for a steal a few years ago but I run it plugged into my Neptune controller for some extra protection. I also use a kalkwasser reactor and there is some risk of raising the pH too high so I came up with this:

Max Change 030 M Then ATO OFF
If pH > 08.60 Then ALM ON
If pH > 08.40 Then ATO OFF
If Switch1 OPEN Then ATO OFF
If Switch1 CLOSED Then ATO ON
If Timer KAL = ON Then ATO OFF