Re: Hot water pressure and hot water accumulator tank
Thomas,
Although Bill correctly points out the expansion tank takes care of the increased pressure, it may be helpful for you to know how it does that so you understand that it's not extra water storage. Picture the expansion tank as a small tank having a rubber diaphragm across the middle (although there are some other designs). It has water on one side and air on the other. As your pump works it forces water into the water end and that forces the diaphragm to flex into the air side until it compresses the air to the pressure that turns off your pump. The next time you run water that pressurized air pushes back the diaphragm, the pump comes on and the cycle repeats. Hence you will notice the pump will not go off as soon as you close your faucet - it needs a couple of seconds to pressurize the system up to the shut off pressure. Now, when your hot water heater operates the hot water expands and needs a place to go or it will either open the pressure relief valve or burst the tank. That's where the expansion tank comes in. The expanded water flows back into the system and the expansion tank diaphragm will expand to accommodate it, keeping the pressure in the system below the level of your safety pressure relief valve on the hot water heater. Depending on what tank you buy, some are pre-pressurized and some have a schrader (bicycle) valve you use to add air. You'll want to keep the pressure about the same as the cut off pressure of your pump. You can play with it if your pump cycles too long after shutting off the faucet (too much pressure) or if it cycles exactly with the faucet (too little pressure, such that it's just acting as an additional tank with no expansion capability.) Hope that helps. Craig
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Re: Hot water pressure and hot water accumulator tank
Thomas, the purpose of the hot water accumulator tank is to take care of the increased pressure in the hot water system caused by heating the water. Heating water increases the pressure in a closed system and increased pressure can harm components. The accumulator does not increase the storage of hot water. Best, CW Bill Rouse 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sun, Jul 14, 2019 at 11:13 AM Thomas Kleman <lorient422@...> wrote: Bill- thanks as always for the great info. So this tank is just an 8 liter reservoir for my basic 40 ? Does it only allow ingress under some kind of pressure ? If not it merely expands my basic 40 into a basic 48, I suppose the additional 20 pct capacity prevents my pressure relief valve from tripping ?
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Re: Hot water pressure and hot water accumulator tank
Thomas Kleman
Bill- thanks as always for the great info. So this tank is just an 8 liter reservoir for my basic 40 ? Does it only allow ingress under some kind of pressure ? If not it merely expands my basic 40 into a basic 48, I suppose the additional 20 pct capacity prevents my pressure relief valve from tripping ?
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Re: Spar painting in the Eastern Med
Mohammad Shirloo
Hi Greg;
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We hauled out at Manoel island in Malta last year. Although I do not have first hand experience, I was told by a reliable source that they had very good painting contractors in Malta. Respectfully; Mohammad & Aty B&B Kokomo AMEL 54 #099
On Jul 14, 2019, at 9:33 AM, Gregory Shea via Groups.Io <gmshea=hotmail.com@groups.io> wrote:
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Re: Hot water pressure and hot water accumulator tank
Thomas, On your SM the hot water pressure accumulator tank was originally located between the water heater and the port side of the engine room. Unfortunately, I have seen some owners remove this tank when it starts leaking. I assume they feel that there is no harm, but actually, they are over-pressurizing the hot water side of their freshwater system. This can cause many issues. If you no longer have the Amel-installed accumulator tank for the hot water system, you should install a 4-8 liter accumulator tank. It is normally connected to the hot water system via a hose from the freshwater manifold which is mounted on the aft bulkhead of the engine room. See photo below and note red circle on the hose. Also see an image of a page from my Amel Book, attached. Best, CW Bill Rouse 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sun, Jul 14, 2019 at 9:20 AM Thomas Kleman <lorient422@...> wrote: Bill- I definitely have no accumulator tank in the circuit. I just thought all these years that the basic 40 had a relief valve set too low (7 bar ?). These relief valves tend to last me 1-2 years (I buy them in bulk). Can you send me a pic of the correct setup ? I've never seen one.
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Re: Hot water pressure
Tom has identified his problem - no expansion tank, but I think this topic started with Mawgan's problem of no hot water flowing after he installed a new tank.
Mawgan, how did that work out?
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Re: Spar painting in the Eastern Med
Hi Greg,
Check out Agmar Marine's Partheni Boatyard next to the airport on the north end of Leros. Very skilled workers and, although I didn't have painting done, I did see their work and it was exceptional. It was several years ago I was there, but have heard from others that's it's still good. Cheers, Craig Briggs, SN68 Sangaris
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Re: Hot water pressure
Thomas Kleman
Bill- I definitely have no accumulator tank in the circuit. I just thought all these years that the basic 40 had a relief valve set too low (7 bar ?). These relief valves tend to last me 1-2 years (I buy them in bulk). Can you send me a pic of the correct setup ? I've never seen one.
Thomas Kleman SM2K 422 L'ORIENT Panama
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Re: Liftplan and measures Amel 54 for shipping document
SevenStar is perfect for this. I am sending you a private message. Best, CW Bill Rouse 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sun, Jul 14, 2019 at 8:23 AM CARINA HAMMARLUND <syultimo@...> wrote: Hi Bill,
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Re: Liftplan and measures Amel 54 for shipping document
Hi Bill,
yes it is Seven Star. I saw that you used them at one occasion a couple of years back. -- Carina SV Ultimo Amel 54 No 165
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Re: Spar painting in the Eastern Med
I would not recommend Emek from my experience and sighting some of their other customers completed work.
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Regards, Paul... Sent from my iPhone
On 14 Jul 2019, at 17:33, Gregory Shea <gmshea@hotmail.com> wrote:
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Spar painting in the Eastern Med
Gregory Shea
Hi all,
I have a problem with the paint blistering on my spars and wanted to get them repainted. I am in Greece and wondered if anyone had any experience with a project like this, in the Eastern Med. I'm guessing Emek in Turkey is a possibility, with their Amel track record. Cleopatra in Preveza declined. Any suggestions? Greg Shea Sharki 133 Cap des Iles
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Re: Liftplan and measures Amel 54 for shipping document
Is the shipping company SevenStar? Best, CW Bill Rouse Yacht School - Supporting Amel Owners www.YachtSchool.us 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sat, Jul 13, 2019, 7:17 PM CARINA HAMMARLUND <syultimo@...> wrote: Hi,
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Liftplan and measures Amel 54 for shipping document
Hi,
We´re planning to ship our Amel 54 from Phuket to Europe next year. The shipping company need some documentation and all measures of the boat. Is there anyone else within this forum that have done this and maybe have this plan/drawing in place? I have tried to find it in our Amel owners manual and in the Amel users guide but unfortunately I can not find it anywhere... Cheers, -- Carina SV Ultimo Amel 54 No 165
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Re: Hot water pressure
On a brand new water heater they have a plastic plug in the connections. This may have been pushed into the connection. This can happen in transit.
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Re: Hot water pressure
Thomas, You should have an accumulator tank installed in the hot water circuit near the water heater. This will accommodate the increase pressure when the main engine reaches an operating temperature of 80C. The rubber bladder inside the accumulator tank may be defective. When the accumulator tank bladder leaks, the accumulator tank can no longer function. You should check for this. If the accumulator tank has been removed, you should replace it. If you have an accumulator tank and the bladder is OK, the next time the relief valve opens, measure the temperature of the engine at the coolant water pump or the oil filter. It should be 80C after the engine has been running for 1 hour in normal weather conditions. If it is higher than 8%, you may have an issue with your engine. I hope that this helps you and others with this issue. Best, CW Bill Rouse 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sat, Jul 13, 2019 at 8:45 AM Thomas Kleman <lorient422@...> wrote: On my basic 40 the pressure relief valve is constantly tripping (especially when water is heated by running engine). Also the sealing o-ring can deform and block part of the flow. I'd check those things too.
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Re: Hot water pressure
Thomas Kleman
On my basic 40 the pressure relief valve is constantly tripping (especially when water is heated by running engine). Also the sealing o-ring can deform and block part of the flow. I'd check those things too.
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Re: Hot water pressure
You didn't say, but the obvious would be that you mixed up the connections between the engine and the the water system. This is easy to do, especially because the orientation of these connection change between different model heaters. If, you have the above issue, you likely have some engine coolant inside the hot water lines and will need to completely flush it out. Additionally, I have seen the copper Amel-made connection elbows become completely clogged. This is easy to see and clean. I hope this helps you. Best, CW Bill Rouse Yacht School - Supporting Amel Owners www.YachtSchool.us 720 Winnie St Galveston Island, TX 77550 +1(832) 380-4970
On Sat, Jul 13, 2019, 12:39 AM Mawgan grace via Groups.Io <gashman=ymail.com@groups.io> wrote: Hi all,
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Re: Hoping to tour an Amel Santorin in USA
Thank you for the recommendation Jean Pierre.
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Best, Dave sv Liesse SN 006
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Hot water pressure
Mawgan grace
Hi all,
I’ve just replaced my hot water heater and I’ve got no hot water pressure! Cold water is great with the pump cutting in and out but the hot water is a dribble. I’ve checked no air locks etc.. any ideas? regards Mawgan SV Adela #310 SM
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