Check my Apex programming, please....

Xyloxo · Oct 1, 2022

Can someone double check my ATO programming for me real quick? I recently installed an Avast ATO after 2 PMUP's burned out on me. So far so good until this am when I woke up to an Alarm for my salinity at 30! In the process of correcting that slowly.

I have the Avast pressure switch as a primary and a New magnetic optical sensor as a backup.

The pressure switch is ATOswt and the MOS is SUMPLO

I'm questioning my placement of "SUMPLO" in the program, as well as the "WHEN ON >" statement. I was considering changing that to 1 minute versus 3.

I have a LLS installed in the return pump area which has been stable throughout.

If you folks could take a peek and let me know what you think, any input is appreciated.

Fallback OFF
Set OFF
If ATOswt CLOSED Then ON
If SUMPLO Open Then ON
Defer 002:00 Then ON
Min Time 005:00 Then OFF
When On > 003:00 Then OFF
Defer 000:10 Then ON
Defer 000:04 Then OFF
Min Time 030:00 Then OFF
If Output Emergency = ON Then OFF
If Output Maintenance = ON Then OFF

Lbrdsoxfan · Oct 1, 2022

Double check the pressure switch, IDK for them as they can be finicky.

Are you logging the outlet for the ATO pump, I wouldn't be surprised if the pressure switch is junk or needs adjustment.

Xyloxo · Oct 1, 2022

Lbrdsoxfan said:
Double check the pressure switch, IDK for them as they can be finicky.

Are you logging the outlet for the ATO pump, I wouldn't be surprised if the pressure switch is junk or needs adjustment.

I am, the ATO kicked on for 3 minutes at 2 AM, now granted, the Avast diaphragm pumps flow is much faster than the PMUP was. That's one reason why I was considering having the outlet switch off after 1 minute instead of 3.

Lbrdsoxfan · Oct 1, 2022

I'd drop it to 1 minute for starters, but that would mean it pumped in a lot if it ran for 3 minutes straight and it nose dived your salinity.

I have something similar but I run on old school float switches, my code is a little simpler:

'Flotsw' is my main float control, 'HighFl' is the backup float. I only use 30 seconds due to having a smallish return chamber and a 100gph 12v pump in my ATO container.