Re: [Amel Yacht Owners] Dessalator Water Maker Issues & New Photos
eric freedman
Gary,
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Thanks for the info. Where is your boat now? We are in St Martin. Fair Winds, Eric
-----Original Message-----
From: amelyachtowners@yahoogroups.com [mailto:amelyachtowners@yahoogroups.com] On Behalf Of amelliahona Sent: Saturday, February 25, 2006 12:24 AM To: amelyachtowners@yahoogroups.com Subject: Re: [Amel Yacht Owners] Dessalator Water Maker Issues & New Photos --- In amelyachtowners@yahoogroups.com, eric <kimberlite@...> wrote: 24 Feb 2006Eric: I purchased 3/8 inch quick connect fittings at Home Depot (white plastic, push together fitting that are good to 100 psi) and cut the blue 10 mm product water line. There is virtually no pressure on this line . The sensor for the EC system that I mentioned previously plumbs into a 1/2 in pipe thread fitting. I bought a 1/2 inch PVC pipe "T" fitting, and plumbed it with the quick connects. So the sensor is just immersed in the product water as it flows by. I'll post photos after my next trip. I took 220 volt 50 Hertz Power from the circuit breaker for the water maker. I have noticed that upon startup the EC briefly goes to somewhere above 2000 microsiemens but then within 30 seconds it comes down to about 350. If you run the watermaker below green range pressure the EC is actually higher than if run in the normal operating range. I don't quite understand that but it is consistent. I inquired of the Wafer Fire and Ice people that I bought my membranes from and they tell me that this is normal. They call it TDS creep. Evidently when the system is shut down the high TDS on the sea water side draws the product water back across the membrane by osmotic pressure. This then concentrates the solulte in the product water side as more and more water is drawn back across the membranes. The longer the system sits idle the more TDS creep there is. So the initial minute or two of product water will be high in TDS (EC). Perhaps that is why the Dessalator system had a timer. I have spent hours corresponding with Dessalator and they will not provide me with schematics or a logic diagram for the system. I plan to take detail digital photos of the circuit boards next month when I get on the boat and reverse engineer the electronics. It doesn't appear to be that complicated. Dessalator says that they do have spare logic circuit boards for sale and will install one if I ship my system to them but they at the same time make no guarantees that the system will behave as advertised even with a new board installed. This is about the goofiest company policy that I have ever run across. Regards, Gary Gary, Yahoo! Groups Links
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