RO/DI Auto Flush

[Rizup]

Hey guys. :wavehand: I know this has been brought up a few times, but when I searched through the threads I didn't find anything that was really productive. I know that I could just buy one of the Aquatec auto-flush valves, but most of those have a flow restrictor built in and they are too small for my unit.

Basically what I want to do is accomplish the same thing as the Aquatec auto-flush valve without having to purchase one. So I have the solenoid valve and power, now I just need to figure out a timer for it that will do two things:

1) Open the flush valve upon startup and close it after 3-5 minutes (Having this time adjustable would be preferred)

2) Open the flush valve every hour and close it after 1 minute (Having this time adjustable would be preferred as well)


I will be powering the solenoid valve and hopefully the timer from my booster pump power adapter which will serve as the trigger. Is anyone familiar with a timer device that will accomplish what I am looking for? I am not opposed to building my own either. I am trying to keep the cost down somewhat, otherwise I would be better off buying the Aquatec unit. I am sure it would be easy enough to setup the inital flush timer with a SPST relay, but I am not so sure about the hourly flush.

Thanks in advance for the help!

 

[Rizup]

I was thinking more about this last night. If no one has a solution to this, I think it may be easier to keep the timer durations the same (say between 1-5 minutes) and just have the timer trigger the relay upon initial power and then again every hour. Basically the timer unit would power the relay for 1-5 minutes (adjustable) when it receives power. After the time period it would deactivate the relay and the timer would count down from an hour and then power the relay again for 1-5 minutes, and start the process over again. Should be fairly straight forward.

How about this unit? Altronix 6062 Multi-Purpose Timer Module

Any thoughts on this or another way to accomplish it or my original plan?

 

[BeanAnimal]

I have built a solution... but it is more than most people are going to be able to build.

Atmega128 microntroller based RODI system. Coded using Bascom-AVR and built on a circuit board I have desgined.

Basic Steps (each step is time adjustable)

MEMBRANE FLUSH - flush high TDS water from membrane equalization
DI BYPASS -clear the high TDS water stuck on the output side of the membrane
DI FLUSH - flush the HI TDS water at initial DI startup
(3) TDS measurement points
Temp measurement
Flow measurement and totalization for each output and filter section.
ATO and Salt Mix resevoir control.

LCD screen with rotary encoder for input.

 

[Rizup]

Nice! That's what I'm talking about

It's more than what I am looking for, but do you have a build thread or anything for this?

I have built a solution... but it is more than most people are going to be able to build.

Atmega128 microntroller based RODI system. Coded using Bascom-AVR and built on a circuit board I have desgined.

Basic Steps (each step is time adjustable)

MEMBRANE FLUSH - flush high TDS water from membrane equalization
DI BYPASS -clear the high TDS water stuck on the output side of the membrane
DI FLUSH - flush the HI TDS water at initial DI startup
(3) TDS measurement points
Temp measurement
Flow measurement and totalization for each output and filter section.
ATO and Salt Mix resevoir control.

LCD screen with rotary encoder for input.

 

[BeanAnimal]

I am still working on some of the software.

Flow transducers are working
TDS probes are here but still evaluating amp circuits
Pressure transducer is working
relays (to operate solenoids) are working, as is the flush and autoflush logic.
Real time clock is working.
Serial setup menu is part done.
Built in HTTP server (web based monitoring and setup) is started.

The project runs from functional state machine to control the solenoids. The menus and (serial, LCD and HTTP) setup and monitoring interfaces run from simple state machines as well.

I will (soon) post the menu state machine, functional state machine and mechanical flow charts.

 

[Rizup]

I am still working on some of the software.

Flow transducers are working
TDS probes are here but still evaluating amp circuits
Pressure transducer is working
relays (to operate solenoids) are working, as is the flush and autoflush logic.
Real time clock is working.
Serial setup menu is part done.
Built in HTTP server (web based monitoring and setup) is started.

The project runs from functional state machine to control the solenoids. The menus and (serial, LCD and HTTP) setup and monitoring interfaces run from simple state machines as well.

I will (soon) post the menu state machine, functional state machine and mechanical flow charts.

Sounds good. Any thoughts on my application here? I am more concerned with the auto flush valve and a DI bypass valve that I have decided to add. I have a few ideas that I am working out now, as I think I can use my Aquacontroller for some of this. I will also be using solenoids to fill my RO/DI top-off container and my water change ASW container I have high and low float switches and a float valve that I fill through and that will be a safety backup on each reservoir. Any ideas or suggestions would be appreciated. Thanks.