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Isotemp water heather without thermostate mixer |
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Balticcruiser
Captain Joined: 23 August 2005 Location: Sweden Status: Offline Points: 150 |
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The engine coolant flows not only through the engine, it also continues through the water boiler to heat up your tap water . Excess heat from the engine is heating your boiler before its cooled by sea water. This is the way you water boiler gets heated while running the engine. If you find leakage close to the water boiler you better check the connections.
/Balti
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Colin Fisher
Commander Joined: 20 March 2008 Status: Offline Points: 97 |
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Hi MarcoC.
The engine heating to the calorifier uses the same fresh water coolant system as all parts of the engine , thus the anti freeze mix will turn up beside the calorifier if there is a small leak. Ideally Hanse should have provided a drain off point to the flow / return coolant circuit , as the only practical way to drain the system at present is to remove one of the hoses , and these are very stiff to remove. However I think this may be pretty much universal in the marine industry ... not much consideration to ease of maintenance! Colin. |
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MarcoC
Admiral Joined: 23 April 2009 Location: Sweden, Stockh. Status: Offline Points: 1617 |
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And people tell me that you cant learn anything from this forum I thought that the heated seawater passed through the calorifier, not the cooling agent. But as I understnad now, the coolingagent gets hot, circulates through the calorifier and warms up the water.If you look at this thread http://www.myhanse.com/forum_posts.asp?TID=3710 can the reason of leakage be that I had the overpressure valve open on the calorifier?
I has never leaked before and suddenly it started to do so....
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"Älva"
Hanse 370#671 Stockholm, Sweden www.wesailhanse.se big wheel, deep draught iron keel, 3 cabins,Yanmar 3JH4E, Sparcraft rig. |
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Colin Fisher
Commander Joined: 20 March 2008 Status: Offline Points: 97 |
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Marco ; The coolant circuit through the calorifier has no relief valve . It comprises simply of a coil of pipework within the tank.The most likely cause of a leak is that one of the two jubilee clips requires to be tightened as the blue hoses are made from a soft type of rubber and compress quite a lot.The screws have to be as tight as possible.
P.S.The relief valves are on the domestic hot water system. I hope that this helps. Colin. Edited by Colin Fisher - 17 March 2010 at 14:37 |
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Hullabaloo
Lieutenant Joined: 28 January 2010 Location: United Kingdom Status: Offline Points: 27 |
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I had this problem. After I tightened the clips on the blue hoses, as indicated in Colin's post, the problem was solved. I had to do the same in the engine bay. John Guy
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Merinalle
Captain Joined: 16 January 2007 Location: Finland Status: Offline Points: 288 |
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This is more than ten years old thread, but I think it is still valid. The reason why to install the mixer is explained clearly. I have a plan to install the thermostat mixer this year, and have already purchased the parts. Our boiler is a stainless Isothemp. Because I am not a plumber, I hope someone who has already made it could share experiences of installing the mixer. |
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320#166
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Alizee
Lieutenant Joined: 22 February 2020 Location: Baltic Status: Offline Points: 27 |
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Can you take pictures of how you solved this would also like to do this or can you describe it?
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Merinalle
Captain Joined: 16 January 2007 Location: Finland Status: Offline Points: 288 |
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Alizee, I have not started the job yet. I still hope that members who have already make this modification would share their experiences. Adding the mixer system seems to be quite simple. I am worried, though, how to make the joints so that it will not leak. |
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320#166
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Peter Russell
Commadore Joined: 24 October 2007 Location: Wiltshire Status: Offline Points: 430 |
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I have the bits to do mine, brought last season, but UK lockdowns and other issues have prevented me doing it. Hopefully we can get to the boat in a couple of weeks time. If I manage to do the task I'll post the solution
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CrocDundee
Commander Joined: 12 December 2018 Location: Dundee Status: Offline Points: 88 |
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I find this very interesting and will test to see if it explains the appearance of fresh water we sometimes get under the hot water cylinder. Even if the post is 10 years old, glad it came to my attention.
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Hanse 345 - Tenacious. Sailing on the Solent and now to the west coast of Scotland.
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