Apex Programming - Secondary ATO

[BrokenReefer]

evening all: probably should have thought of this further in advance of my vacation but here we are. The family leaves for a week long vacation tomorrow and I just got the idea to install a backup ATO so my top off doesn’t run dry and leave my tank suffering while I’m away. Mini vacation last weekend had my sump running in fumes by the time I got home 3 days later.

So my question is kinda simple: programming wise, would I be better served to create a virtual output that triggers the back up ATO or just program it as normal and use the LLS as the guide post to turn on and off?

Currently I have it programmed as follows:

Fallback OFF
Set OFF
If ATOLVL > 5.0 Then OFF
If ATOLVL < 10.5 Then OFF
When On > 005:00 Then OFF
Defer 000:10 Then ON
Defer 000:04 Then OFF
Min Time 060:00 Then OFF

Which is really just the stock code snippet and adjusted to use the LLS in the ATO reservoir (which was also just installed today) as the low level on and high level off. This does leave me a slight cushion for mechanical float to engage and shut off water flow… which I did test a few times this evening.

Certainly don’t need any floods while I’m away either.

Thanks for any and all input!

 

[blaxsun]

This is what I have for mine (I'm using the Neptune ATK kit, which I assume you are as well). ATK_RO is my LLS.

Fallback OFF
Set OFF
If FeedD 000 Then OFF
If ATK_RO < 1.0 Then OFF
If LEAK CLOSED Then OFF
If ATK_LO OPEN Then ON
If ATK_HI CLOSED Then OFF
When On > 010:00 Then OFF
Defer 000:10 Then ON
Defer 000:04 Then OFF
Min Time 030:00 Then OFF

I have an external RO reservoir with the Neptune PMUP that feeds to a gravity-fed internal Ro reservoir (where the Neptune optical sensors and float is). Full details can be found in the link on page 1 of my build thread.

 

[BrokenReefer]

One thing I’ve noticed is that the command runs any time I move the switch to AUTO. The low level command doesn’t seem to trigger the “on” it always seems to be in constant state of “on”.

Additionally, I don’t want the two optical sensors triggering any run commands, can I code those “out” and then also the high level optical sensor is registering a constant closed.

I just updated the code as follows:

Fallback OFF
Set OFF
If ATOLVL > 5.0 Then ON
If Swx7_2 CLOSED Then OFF
When On > 010:00 Then OFF
Defer 000:10 Then ON
Defer 000:04 Then OFF
Min Time 060:00 Then OFF

 

[n2585722]

Wow, it takes several weeks for my DI reservoir to go low. It is a 20 gallon brute can under my workbench in the garage. So I do turn off the auto refill programming when I am gone on vacation. I also stop the auto water changes for that period. I also have someone that goes by the house at least once a day to feed the cat so I can alway have them check out something if needed.