Restarting a D4641 Barnstead E-pure System with Algea
Date : 7/13/2017
From :
Adam Collins
Question
We have a Barnstead E-pure model D4641 system that has been sitting unused for about 4 years, and we'd like to get it running again. We need to replace the filter cartridges, but the cartridge canisters appear to have a slightly green hue to them, which I'm pretty sure is growth of algae. Furthermore, I was told by an old user of the system that the resistivity meter had stopped providing a reading other than 0 ohms, but obviously it's unclear how functional this is with old filters and algal growth in the system.
So, my questions are: 1. Does this system sound repairable?(!)
2. Is algal growth something that would render the system useless even if the filters were replaced?
3. Is there a recommended cleaning process to remove algae without damaging the system?
Answer
Thats not much of a problem.
It reads 0 because the filters are dead. Changing filters should fix that.
The algae and bacteria that grows when stagnant can be cleaned easily.
We do not do field service any longer since most people self service.
You can clean it or have a student clean it and we can talk them through it.
You will need either standard chlorine bleach (hypochlorite), empty sanitization filters and a new filter kit.
Basically you can clean the housings like you would any glassware. Just not over 140F. So a colder dishwasher works well or you can do it by hand.
Once that is done you can put in 1/4 cup of bleach, put all the housings back on with the sanitization filters in them and let is refill and and then recirculate it over night.
The next day you rinse it out, put in the new filters and allow that to recirculate over night and you will be ready to go.
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