Eberspacher exhaust temperature??

[ean_p]

Ball park, what is the level of temperature that we could expect at the end of the exhaust on a large eberspacher air heater , the pipe been about 4ft long and insulated ???

regards

Ian

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[Guest]

You could cook off it. It's the same sort of temperature as a car exhaust. B....y hot.

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[Heckler]

totally agree, in fact have ben toying with the idea of enclosing the exhaust in a heat exchanger to help warm the domestic water
stu

<hr width=100% size=1>http://www.beneteau-owners-association.org.uk

 

[Talbot]

I would say that you are underestimating it, unless you mean the exhaust immediately after the engine (rather than that at the back of the car). Or you could just say that it gets bl**dy hot!

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[VicMallows]

Well, despite what the other posters have said I don't agree. (OK You say a 'large' eberspacher, I have a small DIL). Because I found it impossible to source even a meter of the original 50mm 'aluminium lined cardboard' ducting which disintegrates over a number of years, at anything like a sensible price, I replaced it with a high temperature rated plastic. The maximum temperature I have measured on the outside of the pipe (with a thermocouple) is 50deg C.

Vic
(yes, I enjoy being controversial!)

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[muchy_]

Mine is Bloody hot at the heater end and touchable (just) at the outlet. Total lenght is about 2.5m.
By the way, does anyone know what the maximum lenght of the exhaust can be?

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[Jools_of_Top_Cat]

The overheat sensor in the 1DLC is 116° from the tech manual.

This is on the combustion chamber, so, would the exhaust run hotter than the chamber,

I don't know the answer to this, but would presume not, any idea's?

<hr width=100% size=1>Julian

<A target="_blank" HREF=http://www.topcatsail.co.uk>Top Cat Homepage</A>

 

[paulrossall]

On the D3LC the overheat shutdown works at 116deg C. This means the exhaust should definately not get any hotter than this and I would guess (NB GUESS) should get no higher than 90degC. I am amazed anyone can touch the end of their exhaust. Are we all talking about the same thing here ie. where the burnt fumes go out of the boat?
The technical spec. states low temp setting is 10degC, mid is 18degC and high is 30degC, all approx. I assume this is the max. hot air temperature coming out of the heating ducting into the cabin. I only have high and low settings on my unit but the 30degC max on high would seem to be about what I get.
The maximum length of the exhaust on both D1LC and D3LC is 2 metres from the technical specs I have seen for these heaters. Also the exhaust length is meant to be balanced with the combustion air intake pipe, that means the intake pipe should be made the same length as the exhaust pipe. IMHO. Paul
Download the manuals here for free. It is the web site of the distributor for the USA I am told.
<A target="_blank" HREF=http://www.espar.com>http://www.espar.com</A>

<hr width=100% size=1>" there is nothing-absolutely nothing-half so much worth doing as simply messing about in boats".<P ID="edit"><FONT SIZE=-1>Edited by paulrossall on 13/01/2004 00:19 (server time).</FONT></P>

 

[Talbot]

I believe you are confusing the hot air pipe with the exhaust pipe. The hot air is definetly no more than abt 100 deg. However the exhaust pipe is much hotter. It should be a stainless pipe and the maximum length is 2.5m . It should then have an asbestos substitute wrap and then another piece of pipe to cover it. The larger eberspacher will have a higher exhaust temp than the small one because it is trying to heat a larger quantity of air.

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[VicMallows]

Yes, sorry, having spent last weekend working on my hot-air ducting I misread the original post. Surprisingly difficult to source either the ducting or the stainless exhaust (other than at outrageous prices from Eberspacher.)

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[paulrossall]

Re:Can the exhaust be 2.5 metres?

The technical manuals for both the D3LC and D1LC state a maximum exhaust length of 2 metres. I also checked this with the local Eberspacher dealer who fits both lorries and boats and he confirmed 2 metres. Where have you got the figure of 2.5 metres from? Is this from the very latest (new) units? Mine is an ex GPO unit which is old but has had little use. On most boats the biggest problem fitting the unit seems to be the length of the exhaust you are allowed. Going up from 2 to 2.5 metres would make fiiting easier but might cause problems with the sensetive controlls and lead to the unit shutting down.

<hr width=100% size=1>" there is nothing-absolutely nothing-half so much worth doing as simply messing about in boats".

 

[paulrossall]

For my D3LC I sourced some exhaust (25mm internal diameter) from a manufacturer of stainless steel exhausts, who seemed to mainly manufacture for cars but also made exhausts for other uses. I do not have an invoice but think it cost about £10 for 2.5metres. They are in Nottingham. I also have some of the slightly smaller internal diameter exhaust which goes on a D1LC (22mm internal diameter) which was from Eberspacher which cost me £56 plus VAT. There is 2 metres of this and I would let it go for £25 including postage if it is of use for someone. I am at the boat show on Thursday if you want to see a sample, if it is of any help.

" there is nothing-absolutely nothing-half so much worth doing as simply messing about in boats".

 

[VirgoVoyager]

Ducting and stainless exhaust are both available on a regular basis on eBay. Prices vary, but are generally very reasonable compared with Eberspacher. Just go to the eBay site and search for "Eberspacher".

Good hunting

Stuart

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[VicMallows]

Stuart,

Thanks for the prompt! I've never dreamt of looking for something I thought so obscure ..... though have had great buys on RAM for the computer etc.

Must clear out the loft/garage/shed. Never know, maybe someone out there will want something before it goes to the tip.

Vic

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[Graham_Wright]

Well, despite what the other posters have said I don't agree. (OK You say a 'large' eberspacher, I have a small DIL). Because I found it impossible to source even a meter of the original 50mm 'aluminium lined cardboard' ducting which disintegrates over a number of years, at anything like a sensible price, I replaced it with a high temperature rated plastic. The maximum temperature I have measured on the outside of the pipe (with a thermocouple) is 50deg C.

Vic
(yes, I enjoy being controversial!)

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Silicone rubber?

 

[pcatterall]

I bench test them regularly, the exhaust as it exits the heater will ignite wood if it contacts it. If well insulated the temp may drop only fractionally over its length.

 

[fredrussell]

Re-launching a thread 16 years old. Is this a record?

 

[LittleSister]

Surprisingly difficult to source either the ducting or the stainless exhaust (other than at outrageous prices from Eberspacher.)

The ones sold for the Russian heaters (apparently better quality than the Chinese stuff, CE marked etc.) may well be cheaper:
https://planarheaters.co.uk/shop?olsPage=t/exhaust--intake-parts&page=2

 

[Graham_Wright]

Re-launching a thread 16 years old. Is this a record?

Waiting for Vic.