Reverse Osmosis control/Auto Flush

[DiscusZ]

I am looking at controlling my RO with a 2 x solenoid plugged into Apex

What I want to do is:

solenoid 1 solenoid 2
1) turn on RO ====> Flush RO membrane (1 min or so) ====> Shut off Solenoid 2 =====> Make RO until high float triggered Sh

shut off Solenoid one

Low float, and 2 high floats (one for backup)

I have extra float switches and extras space on one of my 2 Breakout boxes.

Has anyone done this? do you have pictures?


I have a 40 g container and a 100 gpd RO

Thanks


Jim

[p7willm]

There will be a bunch of virtual outlets. First there is one that comes on when you start making water and goes off when you are finished. You might also want to build a timer to shut it off after a time if things go wrong.

vMakeWater
If sLow OPEN Then ON
If sHi1 CLOSED Then OFF
If sHi2 CLOSED Then OFF

If one of the high switches is supposed to close first you want to have a warning when that does not happen.

You need one that is off for the first minute then on

vFirstMinute
Set OFF
If Outlet vMakeWater = ON Then ON
Defer 001:00 Then ON

Now the solenoids
Solenoid1
Fallback OFF
Set OFF
If Outlet vMakeWater = ON then ON

Solenoid2
Fallback OFF
Set OFF
If Outlet vMakeWater = ON then ON
If Outlet vFirstMinute = ON then OFF

[DiscusZ]

Thanks
Once I get my solenoids in I will be giving it a try. I will also have to figure out how long from empty (near empty) it takes TO to fill so I can have it shut off by time.



Thanks

[p7willm]

The shut off by time is a safety measure. If it is ever used then it is an error condition and you should get an alarm.

[DiscusZ]

Yes I know I have thst setup for my ato container that auto fills when empty

Sent from my SM-G920W8 using Tapatalk

[Radiata]

DiscusZ -- thanks for asking...
p7willm -- thanks for answering...

I have two more questions.

What is the placement of the two normally closed solenoids on the RO/DI unit? My guess is that one goes after the micron filtration and before the RO housing, and the other goes in the flush loop around the flow restrictor. Is this correct?

If I chose to add a pressure pump, would I put it on the same circuit as the solenoid that activates the RO/DI unit?

Thank you!

[DiscusZ]

can settting up a defer for 10 hours work? I want to add an other level of redundancy to my RO fill setup. I now know exactly how long it takes to fill my container

10 hours, 3 minutes and 23 seconds when it triggers the float switch.

Would a defer work in this case or should i just stick with 2 float switches at the top one for an emergecy?

I have used the defer for my ATO fill station, onhly have 2 float switchs but I also have a leak sensor in the bottom of another container that my 5g ATO bucket sits in as another fail safe.

Thanks

[DiscusZ]

DiscusZ -- thanks for asking...
p7willm -- thanks for answering...

I have two more questions.

What is the placement of the two normally closed solenoids on the RO/DI unit? My guess is that one goes after the micron filtration and before the RO housing, and the other goes in the flush loop around the flow restrictor. Is this correct?

If I chose to add a pressure pump, would I put it on the same circuit as the solenoid that activates the RO/DI unit?

Thank you!

I have one Solenoid on my Main line coming from the water source, the flush Solenoid is branched off of the FLow restrictor (I have an external flow restrictor with a valve to manually flush) I will try and take a pic of you still dont understand

as for booster pump I was suspect so. I do not have to use one so ... but it makes sense to

[p7willm]

The Defer can be up to 999 minutes, which is over 16 hours.

[Radiata]

p7willm -- thanks for the code - it's working well for me...


DiscusZ -- I put the solenoid after the micron filtration because I figured it would prevent any tap water crud from fouling the solenoid...