Re: Excessive usage of water maker membranes
Was there a specific issue that you were dealing with that led Martin to give you that advice?
Mohammad and Aty
AMEL 54 #099
From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Paul Dowd and Sharon Brown via groups.io
Sent: Sunday, April 19, 2020 2:44 AM
Subject: Re: [AmelYachtOwners] Excessive usage of water maker membranes
I was told by Martin to run the water maker with the pressure at the beginning of the green zone. It also says this in the manual.
S/Y Ya Fohi - Amel 54 #98 - Grenada
When we first purchased Kokomo, I had detailed discussions with Martin, the head tech at Dessalator, about the environments that the water maker could be used and best practices. The following was my takeaway:
We have done the above for 5 seasons of about 5 months each. The pre-filters typically last a whole season. We never put any water in the tank other than from the water maker. The water quality is always below 250 PPM. When we purchased Kokomo, the water maker had only 60 hours on it. So, I’m fairly sure that our membranes are original from 2008 and therefore 12 years old. The water maker now has around 550 hours. I was told that after 500 hours, the quality will probably start to drop. Our usage has solely been in the Med.
Mohammad and Aty
AMEL 54 #099
Yes, I re-read that part and it is a little confusing how I wrote it. In marina, we do a fresh water flush aobut once a week. We do not run the water maker in that environment.
Thanks for the insight, I guess I need to be more fussy about where we run it. I thought the pre-filter would help a lot. I guess not.
With best regards,
Sailing Vessel - Cream Puff
On Behalf Of islandpearl2_sm2k332
We had the 100L/Hr Duo on Island Pearl II and went around the work in three years with a new 2016 set of membranes. Those membranes were still perfect at the end of our trip doing a full 100L/Hr easily on the a/c current but slightly down to 75L/hr on the DC current motor.
We were absolutely fussy about the cleanliness of ocean water before running it and were sometimes scoffed at by others eg in Rodrigues (Indian Ocean) for lifting anchor, risking losing our good spot to go out to sea every four-five days to make water whilst other cruiser friends simply made water inside the large seawater harbour where we felt the water was not up to scratch. Also, we never took the boat out onto the hard for a season, even though we had planned to do this in the Caribbean in 2019.
If you are careful like this, which I suspect you are, then there must be something else at play with your system and I look forward to hearing about that from other more experienced cruisers here.
Also, since we have communicated often and I admire your equally careful approach to looking after Creampuff, I highly suspect that when you refer to "running your watermaker at least once per week in marina's", that you actually meant "doing a freshwater flush cycle" in the marina from your tank as per the manual requirements.... rather than actually making water from the extremely dirty marina seawater which would totally explain everything about your problems, but which I am equally sure you would never have done.
Brisbane ex Island Pearl II
On Sun, Apr 19, 2020 at 12:10 PM Danny and Yvonne SIMMS <simms@...> wrote:
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