Can this work? ATO refill set-up

[D.WhiteShark]

I have a Magnetic Optical Sensor (MOS) and a Neptune Solenoid Valve. I want to automate my ATO Reservoir refill off the RODI line.

I was thinking of putting the MOS at the low end of the ATO reservoir then if "open", it triggers the Solenoid to open for 30 min to refill from the RODI line. I already have a float valve to stop the RODI flow once the reservoir is full. After the 30 minutes the Solenoid valve would return to closed and remain that way until the next time the Optical Sensor reads open again.

I've looked for similar scenarios on here and the Neptune forum but didn't really see anyone doing it this way. I was trying not to buy another MOS because I am phasing out my Neptune equipment as it fails and replacing it with Hydros.

Will this work or am I misreading how others are doing theirs. The main thing I 'm not sure about is will the Solenoid stay open to let water in, or will it close as soon as the MOS is submerged even if the reservoir is not full. If it will work what will the program line look like for the MOS to trigger the Solenoid to open for 30min/1800sec.

 

[Naekuh]

Never trust a Solenoid not to fail when your on vacation with it on, flooding the room.

That being said, can't you drill a hole on the cap or top with a float valve?
What ATO reservior do you have? I would use a float valve any day of the week over a solenoid.

 

[D.WhiteShark]

Never trust a Solenoid not to fail when your on vacation with it on, flooding the room.

That being said, can't you drill a hole on the cap or top with a float valve?
What ATO reservior do you have? I would use a float valve any day of the week over a solenoid.

I already have a float valve drilled through the back of the reservior. I'm using the Solenoid as secondary shutoff in case the float valve fails. Normally I just turn off the water supply for a few days in between so it's not constantly opening and closing when the level changes 1/2 inch. this way it will still cut down the frequency of refills since it will drain further down before refilling and I won't forget to turn on the water supply.

Also IF it fails, it's on my garage tank so there isn't much to flood.

 

[n2585722]

Never trust a Solenoid not to fail when your on vacation with it on, flooding the room.

That being said, can't you drill a hole on the cap or top with a float valve?
What ATO reservior do you have? I would use a float valve any day of the week over a solenoid.

The RODI is not good at delivering a small amount at a time. You are better off letting it deliver several gallons at a time. I use both on mine. The float valve is a backup off. Also I do not leave water on to my RODI when I am on vacation. It gets turned off but when my 20 gallon Brute can is full it will last almost a month supplying the ATO. I also stop any AWC activities when on vacation. I use a solenoid to normally turn on the RODI and also a solenoid to refill the DI reservoir. I also have a solenoid to the mix tank so it can be refilled when it becomes low. I also have leak detectors that will shut off all solenoids if there is a leak detected. Also the refill outputs for both the DI and the mix tank are timed and will only remain on for a given time before turning off and sending an alert. That is currently set to 5 hours and 30 minutes.

 

[D.WhiteShark]

I might not have provided enough info in my post.

-I am not using RODI to directly top off my tank. I have an ATO system for that.

-I am interested in safety redundancy when auto refilling of my reservoir tank from the RODI only. My ATO Reservoir tank is already being refilled through a float valve but runs often for a short time each time if I leave the water supply turned on because it only needs to drop 1/2 before the float valve opens. Normally I turn the supply water to the RODI off to minimize this. (but sometimes forget to turn it back on every few days.)

- I would like the reservoir to get closer to empty before retriggering the refill sequence.

-I am not worried about something going wrong on vacation (I have a house sitter for those issues)

- The main thing I'm not sure about is will the Solenoid stay open to let water in, or will it close as soon as the MOS is submerged even if the reservoir is not full. If it will work what will the program line look like for the MOS to trigger the Solenoid to open for 30min/1800sec.

I appreciate the help!

 

[D.WhiteShark]

I ended up creating a virtual outlet called ATO_Timer for 30 min. Once the optical sensor reads open starts the timer.

Then programmed the solenoid outlet as:

Fallback OFF
Set OFF
If Output ATO_Timer = ON Then ON
If Output ATO_Timer = OFF Then OFF

Seems to be working as desired. I may override the timer later if I pick up a second optical sensor.