Is this RODI setup correct?

-=James=- · #1 11-19-2011, 05:08 AM

Help! After setting up my AquaSafe 7 stage 100GPD RODI unit, I turned on the water just to find that it shoots right back out of the reject tube (Yellow) with lots of pressure.
Not a single drop goes out the RODI tube. The cartridges are used but still have good life left.

Is this set up correctly? Any thoughts?

Heres a pic: Red is water in, Yellow is waste water, Blue is RODI water

Ryan_Lap · #2 11-19-2011, 05:16 AM

Your variable flow restrictor which is on the front of the unit with black handle ( I believe) needs to be adjusted. Adjust it until you get a 4 (waste) to 1 (ro) ratio. Its either 4 to 1 or 3 to 1. I cant remember. You probably have the flow restrictor open all the way so right now you are essentially flushing the membrane.

Ryan_Lap · #3 11-19-2011, 05:19 AM

These instructions may help:
http://www.aquasafecanada.com/aquari...allation-page/

sphelps · #4 11-19-2011, 06:14 AM

Hustler · #5 11-19-2011, 02:01 PM

How would he "flush" his membrane?

wingedfish · #6 11-19-2011, 02:12 PM

Piped wrong, look at sphelps's picture.

You are coming out of the prefilters and through the flow restrict and into the membrane with no restrict or on the waist line.

mike31154 · #7 11-19-2011, 02:51 PM

Quote:

Originally Posted by Hustler

How would he "flush" his membrane?

By opening the valve on the flow restrictor, the item with the black lever. In his photo, the lever is shown in the 'flush' position. To make water, the lever goes 1/4 turn, much like any conventional ball valve. Having the valve open reduces backpressure in the membrane housing so all the water bypasses along the outside of the membrane, flushing it. Once the handle is turned 90 degrees, the built in restrictor creates the required amount of backpressure in the waste line to cause some of the water to get pushed through the membrane and purifying it.

-=James=- · #8 11-19-2011, 05:54 PM

Thanks guys. I bought the item used and this is how it was setup. I will try to re-plumb it.

So I should turn the black valve (quarter turn) 90 degrees to the close position for it to function?

Buckeye Field Supply · #9 11-19-2011, 10:38 PM

Although it probably came that way from the vendor, there is no need for the GAC "Taste and Odor" filter that is plumbed in after the DI cartridge. After the water leaves the DI stage it is as clean as your system can make it.

Also, contrary to how your vendor originally made the system, a horizontal DI stage is a fundamental configuration error. Remove the DI stage from its clips, and orient it vertically with bottom up flow.

Additionally, we recommend against running the DI out put to a pressurized storage container. Be happy to explain why if needed via PM - not interested in educating the ebay vendors!

Russ

-=James=- · #10 11-20-2011, 11:59 PM

I re-pumbed the unit and closed the valve. I hear pressure inside the unit and water is flowing out the YELLOW waste tube slower but still at a pretty fast rate. Nothing is coming out of the GREEN tube where the arrow is.

Any more ideas? I almost gave up and am on the fence of using tap water.