Jeanneau Sun Odyssey Water Storage Heater Relief Valve

[joybennett]

Anyone got any ideas if you can overhaul the Honeywell safety relief valve fitted to the C-Warm water stoage heater on Jeanneau Sun Odysseys? Ours appears to be weeping very slightly - which drains away into the rear engine compartment, which then finds its way into our bilges, and on it goes!!

Obviously, we would have to drain the hot water system to remove it so want to be armed with the facts so we only have to drain down once.

Any ideas on 1) if spares are available and 2) where a replacement valve may be purchased from at a reasonable price?

 

[FullCircle]

Anyone got any ideas if you can overhaul the Honeywell safety relief valve fitted to the C-Warm water stoage heater on Jeanneau Sun Odysseys? Ours appears to be weeping very slightly - which drains away into the rear engine compartment, which then finds its way into our bilges, and on it goes!!

Obviously, we would have to drain the hot water system to remove it so want to be armed with the facts so we only have to drain down once.

Any ideas on 1) if spares are available and 2) where a replacement valve may be purchased from at a reasonable price?

I have a 2005 Jeanneau Sun Odyssey 35
It is not broken, it just needs rotating a couple of times to clear the valve seat.
There is an instruction label helpfully on the side of the calorifier you can't read which tells you to rotate the plastic knob on the valve once a month to stop it leaking, and from allowing build up of scale.

Try that before anything else.
I managed to get 70 gallons of water in my bilge in Bradwell one afternoon due to that....

 

[LittleShip]

Anyone got any ideas if you can overhaul the Honeywell safety relief valve fitted to the C-Warm water stoage heater on Jeanneau Sun Odysseys? Ours appears to be weeping very slightly - which drains away into the rear engine compartment, which then finds its way into our bilges, and on it goes!!

Obviously, we would have to drain the hot water system to remove it so want to be armed with the facts so we only have to drain down once.

Any ideas on 1) if spares are available and 2) where a replacement valve may be purchased from at a reasonable price?

If rotating it dosent do the trick, they are available from any good plumbers merchant. You will however need to see what pressure setting you have on the boat (normally about 2bar) but it could be higher. They sell them obviously with different settings.

ATB

Tom

 

[eddie2000]

Anyone got any ideas if you can overhaul the Honeywell safety relief valve fitted to the C-Warm water stoage heater on Jeanneau Sun Odysseys? Ours appears to be weeping very slightly - which drains away into the rear engine compartment, which then finds its way into our bilges, and on it goes!!

Obviously, we would have to drain the hot water system to remove it so want to be armed with the facts so we only have to drain down once.

Any ideas on 1) if spares are available and 2) where a replacement valve may be purchased from at a reasonable price?

As Fullcircle says, rotating the knob occasionally should prevent weeping.
Another possibility is that when on shore power, the thermostat for the immersion heater is set too high causing the water to boil (you would likely hear this with an ear near the tank). It will then definitely over pressure! (Note there is no temp control when on engine).

 

[FullCircle]

Its one of these from Cleghorn Waring


http://www.cleghorn.co.uk/c-warm-he...mperature-and-pressure-relief-valve-25bar.htm

 

[Stu Jackson]

You might want to get in the habit of turning on your hot water heater for anywhere from 15 minutes to a half an hour and then turning it off. This will avoid overheating problems and there is no reason to have it on any longer once the water gets hot. Unlike home systems, on a boat you're most likely using as little water as possible, and saving as much hot water as you can. If it start cooling off, then flip the switch back on for another 15 minutes. This is a habit I was taught many years ago, and we've never had pressure relief valve issues.

 

[bobgoode]

Common problem.

The valve, as you correctly state, drains into the bilges when it releases. Rotating the grey knurled end improves things. You could always re-route the overflow pipe to the tramsome and drain the overflow overboard.

 

[joybennett]

Joy Bennett

Thank you all for your advice.

It is interesting that Jeanneau don't actually tell you to do anything with the valve and don't even show it on the build information for the boat. We will try to turn the grey knob and clear the valve seat - we don't use shore power but the problem is occuring when we are running the engine.

We may have to invest in a new valve but at £25.00 I don't suppose that it will break the bank.