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House Renovations
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 18/12/2005, 8:39
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chrisbooth
Joined on 18/12/2005
Posts 14
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Re: Oil Heating operating correctly
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Hi Kevin, I read your information on oil heating and found it makes excellent reading. I have recently bought a house in dept 30. It has a new oil heating system, using a Lamborghini boiler. I have fitted a wireless room stat, a frost stat as non of these were fitted with the system.
After reading your information I am concerned that the burner is not operating correctly. The boiler fires up and then after a while it swtiches off for a few minutes and then fires back on again. I am not sure if this is because the internal boiler water temperature has reached its correct temperature or ??????. Is this normal or should the boiler run continuously. I am fairly competent with most mechanical things bu have never experienced an oil boiler. If there is a problem, is it one I can rectify/adjust. You also mention injectors, is this the brass nozzle that vapourises the oil.
You have probably guessed that I am keen to learn the workings of an oil boiler
Would be grateful for any advice
Kind regards
Chris
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18/12/2005, 9:34
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Opel Fruit
 
Joined on 20/03/2005
Posts 339
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Re: Oil Heating operating correctly
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The boiler will run for a period until the water temperature reaches the temperature set on the Aquastat on the control panel. The normal temperature setting would be 60-65C on this. The Aquastat has a hysterisis of about 6-8 C, so once the water temperature drops by this amount, the burner will restart. This is repeated until the power is cut by either a programmer and/or the room stat or frost stat. The problem with short-cycling (where the burner cuts in and out very frequently) is due to the burner being set to provide too much power. By default, burners are set to maximum from the factory. This means you probably have a 32 kW boiler for a 20 Kw demand. To rectify this involves changing the injector (the brass nozzle) for a smaller one in accord with the table in the burner manual. You probably only need about 20-22kw (I'm guessing) so you are looking for an injector of 0.50 gph maximum, with a fuel pressure of 12 bar. You could also try an injector of 0.40 gph set to 14 bar.
It is possible to reduce the fuel pressure you currently have, but below about 10-11 bar, the injector will chatter and the flame will be instable - injectors have a shut-off function to avoid drips from residual pressure.
To effect the pressure adjustment will require the use of a pressure gauge (which is screwed into the bleed screw temporarily). I suspect that you could change the injector yourself and ask a local chauffagiste to set the pressure pour boire. The air settings will also require adjustment once the injector and pressure are done. The resultant power reduction will enhance both the economy of the system and improve the longevity of the burner. And it will run somewhat quieter...
Opel Fruit, Dept. 53
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18/12/2005, 10:19
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chrisbooth
Joined on 18/12/2005
Posts 14
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Re: Oil Heating operating correctly
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Thanks for your prompt and informative reply
Kind regards
Chris
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18/12/2005, 12:01
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chrisbooth
Joined on 18/12/2005
Posts 14
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Re: Oil Heating operating correctly
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Hi again, hope you dont mind me asking another question. I have manged to download a pdf file with the instructions for the Lamborghini boiler. It appears the boiler has an output of around 34kw, it is a combi bolier but we only use it to heat the radiators. the water is provided by electric on heures creuse.
If I purchased new injector for 0.50gph (does this stand for gallons per hour?), is it possible for me to self fit. I am confident of being able to physically fit the part into the burner unit, but if it then needs to be adjusted it will be beyond my expertise.
I am off to france on Boxing day and now you have kindly given me information I would like to use that in making the boiler more efficient
Thanks again
Chris
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22/12/2005, 10:13
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chenauds
Joined on 07/12/2005
Posts 45
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Re: Oil Heating operating correctly
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Hi Opel Fruit,
Expecting a warm and cosy Christmas thanks to your help. Hope that you have a good one and a happy new year.
www.leschenauds.com
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29/12/2005, 17:18
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Roberto
Joined on 29/12/2005
Posts 2
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Re: Oil Heating operating correctly
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Chris, where did you get the PDF manual for the Lamborghini boiler from please?! I'm currently staying with relatives in France who have a Lambo (Fire 1 C/FR) which after a few hours of disuse, refuses to fire up - it's showing a red light at the top left which is clearly a 'fan failure' light - we don't have a manual, and I've figured we can restart the boiler by taking the bottom front cover off and pressing what appears to be a priming pump/switch. However, this is ponly a temporary fix. My assumption is that this is possibly associated with fuel temp - the outsoide temp being around -3 at the moment. Any thoughts, or a hint as to where I could find a manul, would be gratefully received!!!
 chrisbooth wrote: | |
Hi again, hope you dont mind me asking another question. I have manged to download a pdf file with the instructions for the Lamborghini boiler. It appears the boiler has an output of around 34kw, it is a combi bolier but we only use it to heat the radiators. the water is provided by electric on heures creuse.
If I purchased new injector for 0.50gph (does this stand for gallons per hour?), is it possible for me to self fit. I am confident of being able to physically fit the part into the burner unit, but if it then needs to be adjusted it will be beyond my expertise.
I am off to france on Boxing day and now you have kindly given me information I would like to use that in making the boiler more efficient
Thanks again
Chris |
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France Forum » Building and Re... » House Renovatio... » FAQ - Oil Heating, Hot water production and plumbing “funnies” in France
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