Hoval Boiler help

Kevin_27

Well, I decided to poke around a little bit and now it is running better. I opened the air intake a little into the burner. I imagine that this means that it won't burn as clean, or efficiently as it could, but at least I am not listening to my wife complain about how cold the house is.

Thanks for all of the information along the way guys, very helpful.

As far as I can tell, there isn't a real problem with my solution, maybe I could buy a better quality burner, but I can't spend the $400 - 500 I was told it would cost right now.

thanks again. This is a great resource.
Kevin

Kevin_27

Which burner?

I have a Hoval DuoLyt Boiler in my home. I have had about a dozen technicians tell me that they basically have no idea how to tune it to run well. After about a month I have to get them to come out again and clean the nozzle and get everything running again.

The problem seems to be the burner isn't the one that is supposed to be on this boiler, but I have no way of finding out what the correct specs are for a burner to go with this unit. I emailed Hoval and when they found out I was in the US and not the UK, I stopped getting email.

If anyone knows anything about these boilers, please enlighten me.

Arthur

Hoval Boiler?

> I have a Hoval DuoLyt Boiler in my home. I have

> had about a dozen technicians tell me that they

> basically have no idea how to tune it to run

> well. After about a month I have to get them to

> come out again and clean the nozzle and get

> everything running again.

>

> The problem seems

> to be the burner isn't the one that is supposed

> to be on this boiler, but I have no way of

> finding out what the correct specs are for a

> burner to go with this unit. I emailed Hoval and

> when they found out I was in the US and not the

> UK, I stopped getting email.

>

> If anyone knows

> anything about these boilers, please enlighten

> me.

Arthur

Hoval Boiler?

Is this a vertical downdraft boiler? ie the burner fires vertically down and the flue is off the bottom of the boiler??

Kevin_27

Hoval

Thanks for your interest. No, the burner is in front of the unit and fires straight to the back.

lchmb

never

Never heard of one. But how about a pic. This one sounds interesting

Kevin_27

Front and Back pictures

Here is a picture of the front and back of the Hoval DuoLyt

techheat_2

Do you use it with coal as well? If so,I assume it has 2 separate combustion chambers.

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Mark Eatherton1

Looks like some SERIOUS issues...

Based on the tubercles on the extreior of the flue pipe, I'd have to guess that the burner is either MAJORLY underfired, or something. I tried Googling and found 2 web sites, both German.

This link allows for translations.

http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLD,GGLD:2003-33,GGLD:en&q=Hoval+DuoLyt+Boiler

Good luck in your ventures. This is what happens when products get out of the manufacturers control.

ME

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Kevin_27

Hoval

There are two chambers. Actually, on the right hand side of the front picture, you can see two doors. I have never tried to burn anything in them, but apparently you could burn coal or wood ???

Kevin_27

Tell me more

Now about this idea of being "under fired," what do you mean, and what could I do about it?

I always wondered about that stuff on the pipe, but I don't really know what it is or what causes it.

Thanks

Mark Eatherton1

If an appliance is underfired...

the flue gasses never get above condensing temperatures, and consequently, they condense and cause the kind of damage you're seeing on your flue pipe.

Are there any manufacturers listing plates showing KW input or output on this beast? As for dual fuel, I'd be cautious about using it on any situations where the flue liner may not be adequate for solid fuels. Better safe than sorry.

ME

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Dale

Input

Seeing that Bock next to it on the same oil line I wonder if the boiler is getting enough oil when both fire at the same time, perhaps firedragon could comment. Next, where is the barometric damper? Is it sharing one with the Bock? The flue pipe tells the low temp condensing in the flue story and I hope you can find some original install instructions. The coal/wood side must be sealed from room air to keep the vent temp up. If your heating person deals with Beckett have him call them as they have alot of resources and are very helpful.

Kevin_27

damper?

Sorry, I am just a homeowner learning about this as I go, what is a barometric damper? I guess from its name it is going to limit air flow based on pressure?

Arthur

Hoval Boiler

Yes Dale is correct the coal side damper at the bottom to allow combustion air into the coal side MUST be closed when firing on oil.
About 30+ years ago a firm I used to work for made the Hoval boilers under licence here in NZ, There was a big commerical vertical model a TKD from memory. The burner fired into a circiular chamber surrounded by water apart from a horizonal slot for the combustion gas to go out, This was mounted quite high up in the boiler and the mainly waste rubbish could be chucked in opening in the side of the boiler onto a grate and then coal could also be fired in at grate level then there was a draft door below that which was used to regulate the air, controlled by a thermostatic dampwer control just like the one your boiler. The ashes could also dragged out this door too.
Most of the boiler had a galvanised calorifier tank mounted and on the top of the boiler, the tanks were fabricated and then hot dipped before being welded on tp the boiler. The primary pipework and pump was mounted outside the boiler,
They were used on a lot of hotels for heating and for domestic water. Was a great way for Hotels to burn their rubbish.
When firing oil the bottom door was unhooked from the damper controller and left closed to prevent secondary air from getting into the boiler and diluting the flue gases.
I would suspect the damper has been left open and this would acount for the low flue temp.
The burner used was the usually the Elco which was a good burner as it was capable of firing against a high back pressure.

Bruce M.

Hoval e-mail

Hoval is an Austrian company. Try e-mailing them at:
info@hoval.com

Go to this web site and request a manual for your boiler.

http://www.hoval.com/english/defaults/bestellen/heiz_d.html