Calorifier, what do i need?

[Falcoron]

I am restoring my Broom 35 sedan which has large Hino turbo diesels in her, There is no hot water tank but has a gas water heater guizer in the Galley which i have ripped out, ( less gas the better)
Which was feeding the galley and head shower etc.

Now the cold fresh water tank has a pump and a red pressure ball thing there, how does this thing work with the heater?

So i am going to get a calorifier with a mixer valve what size is the norm for day to day use ( when on the boat) 2 showers a day for 2 people and usual hand washing dishes etc. Lots of sizes to choose from.

Do i need a single or dual coil one?

Also best spare space i have is at rear of the boat, do these need to be set a certain distance from engine and cold supply.

How or where do i take the feed from the engine to the calorifier?
Thanks in advance
Ron

 

[Timeless 2]

The cold water pump and the red sphere supply water at pressure from your storage tank. The red sphere is an expansion vessel to reduce the cold water pump cycling. If you fit a calorifier it should come with another expansion vessel to absorb the expanded water when the water is heated, location should be in the cold supply close to the cylinder. You would only need a twin coil cylinder if you intended to have 2 sources of indirect heating, say the engine and a hydronic eber. As for capacity the largest you can fit would be my choice but 80 litre would be a minimum for me. If you have access to shore power then an immersion heater as well. The take off from the engine is usually a kit supplied by the engine maker usually some correct sized nipples to thread into the engine block connected to 1/2 inch lever valve which you can then connect to the cylinder cool with hose or plastic plumbing tube. If you have the cylinder too far from the engine you might need an additional pump to overcome the pipe work resistance.

 

[freddyuk]

I would have the calorifier as close to the outlets as possible bearing in mind the comments above as otherwise the time it takes for hot water to reach the tap is too long and you are wasting water. The correct size pipe will help here. If the calorifier is too big it will take longer to heat up useful amount of water.

 

[Falcoron]

Thanks guys, just found out my new (to me) boat does not have heat exchangers and is direct cooled so a calorifier will be no good without a diesel water heater, going to be expensive showers!!

Any alternatives i should consider?
Cheers

 

[penfold]

You don't need heat exchangers for running a calorifier, but the maximum temperature your hot water will reach will be lower and as seawater is flowing through the calorifier it will corrode, shortening its life.

 

[Falcoron]

You don't need heat exchangers for running a calorifier, but the maximum temperature your hot water will reach will be lower and as seawater is flowing through the calorifier it will corrode, shortening its life.

Thanks Penfold,
Boat is not in the sea, its in fresh water and if getting a calorifier it will be an all cooper one.

How do i get hot water from engine to calorifier without a heat exchanger? Was told by Surecal this will not work.


I have bought a diesel Wabasto water heater so, can i use a calorifier with this and heat the water and maybe fit a couple of radiators too?
I can heat the water by this when cruising and use the calorifiers 240v heating element when on shore power.
Would this work?

 

[madabouttheboat]

How do i get hot water from engine to calorifier without a heat exchanger? Was told by Surecal this will not work.

I am very surprised by that, unless theer is something special about Hinos. You most definitely can use a raw water cooled engine to produce hot water via a calorifier. I had one on a previous boat. A raw water cooled V8 petrol. You just need somewhere to tap a flow and return into the cooling water. On the V8 it was off the water pump and the block, from memory. Will be different for every engine, but definitely possible.

 

[Falcoron]

Thanks,
The info i got this this will not work was not specifically for my Hino engines, (i never told them which type i had)
Even on the ASAP video here at 2:00 mins, How Calorifiers can provide free hot water for your boat - Bing video
They state these will not work with a directly cooled engine, when i asked about that comment they told me the same and that i needed a heat exchanger.
This is why i've went this way and bought a water heater, will be pissed off if i can do this without the heater.
But i can always sell on as its a fully reconditioned one from Wabasto with a warranty.

 

[penfold]

Do you have a diagram of your engine's water circuit, or some pictures of it showing the plumbing?

 

[Falcoron]

No but i will be going to boat tomorrow ill get some them, Cheers

 

[Montemar]

Consider the weight of the calorifier and its position in the boat. If you have a list you can position the calorifier to correct it. Alternatively you may cause a list!

 

[Falcoron]

Do you have a diagram of your engine's water circuit, or some pictures of it showing the plumbing?

Do these help?

 

[Falcoron]

 

[penfold]

They're a bit small and is it possible to see the front end?

 

[Falcoron]

Won’t let me put bigger on

 

[Falcoron]

Same as this

 

[penfold]

That's an indirectly cooled engine; whoever told you they aren't is a wally. A calorifier would be plumbed in by splicing into one of these two hoses, but without knowing which is supply and return I can't say which.

 

[Falcoron]

ok thanks I’ll get in contact with Hino abs find out
Cheers