Re: Excessive usage of water maker membranes
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Mohammad Shirloo
Paul;
Which water maker do you have? We have the 150 L/HR A/C only unit. I was told that the system can be run at high green pressure setting, 24x7x365 without any issues. We have not had any issues with our HP pump, so far.
Happy Sailing;
Mohammad and Aty B&B Kokomo 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 10:09 AM To: main@AmelYachtOwners.groups.io Subject: Re: [AmelYachtOwners] Excessive usage of water maker membranes
Mohammad,
It was at a time when the HP pump was on its way out. I ended up replacing it. I have since run with the pressure on the orange/green border and it has been fine and still made 100+ litres/hour.
Cheers, Paul S/Y Ya Fohi - Amel 54 #98 - Grenada
From:
main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
On Behalf Of Mohammad Shirloo
Hi Paul;
Was there a specific issue that you were dealing with that led Martin to give you that advice?
Happy Sailing;
Mohammad and Aty B&B Kokomo AMEL 54 #099
From:
main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
On Behalf Of Paul Dowd and Sharon Brown via groups.io
Mohammad,
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.
Cheers, Paul S/Y Ya Fohi - Amel 54 #98 - Grenada
From:
main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
On Behalf Of Mohammad Shirloo
Hi;
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.
Happy Sailing;
Mohammad and Aty B&B Kokomo AMEL 54 #099
From:
main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
On Behalf Of Mark Erdos via groups.io
Hi Colin,
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,
Mark
Skipper Sailing Vessel - Cream Puff
From:
main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io]
On Behalf Of islandpearl2_sm2k332
Hi Mark
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.
Colin Streeter Brisbane ex Island Pearl II
On Sun, Apr 19, 2020 at 12:10 PM Danny and Yvonne SIMMS <simms@...> wrote:
-- Colin Streeter 0411 016 445
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