ENO cooker

[pio]

In my SO 32 from 2004 an ENO cooker/oven is mounted. Since few years the flame of the large burner has yellow points. When cooking potatoes, after the water is boiling, I turn down the height of the flame. Then the flame becomes fully yellow and starts sooting. Also I hear the gaz then buzzing.

I'm using camping gaz with a pressure controller of 30 mbar.

I heard that this phenomen happens more, but I didn't hear a solution.

Can anyone help me?

[tomina]

Hello Pio

The mostly likely fault is a distorted aluminium flame ring. This is the ring which sits under the top black "cap" and from which the flame emanates. If you take the ring off the cooker and set it on a truly flat surface you might just see the distortion which will be very small. The item is easily replaceable from the ENO/Calor dealer which is near Southampton (I think). If you are in the UK.

It is less likely but possible that the regulator pressure valve is slowly failing, they should be replaced every five years, while it is possible to adjust them you would need to get advice from the manufacturer.

I would go for the flame ring first and get the small one at the same time.
Hope that helps
Michael Solano S/Y Julia Too

[pio]

Michael, many thanks for your reaction. I checked the crown ring and found it to be OK. My pressure valve gives exactly 30 mbar. But I cannot check if it is pulsing or not. The valve is 1,5 years old and I head same problem with the previous valve. In fact the large burner never worked very well.

Yesterday I've done few experimenst and found that most likely the venture effect is not strong enough for this very low gas pressure. So I try now to improve the venturi effect by placing the gasnozzle a bit higher. Now it seems that the venturi effect is easily disturbed by a bit false wind or by the heat of the flame itself.

[electricmonk]

Oct 17, 2013 17:52:02 GMT pio said:

In my SO 32 from 2004 an ENO cooker/oven is mounted. Since few years the flame of the large burner has yellow points. When cooking potatoes, after the water is boiling, I turn down the height of the flame. Then the flame becomes fully yellow and starts sooting. Also I hear the gaz then buzzing.

I'm using camping gaz with a pressure controller of 30 mbar.

I heard that this phenomen happens more, but I didn't hear a solution.

Can anyone help me?

The clue is soot.

any yellow in the flame indicates a lack of air for complete combustion so its highly probable that there is nothing wrong with the gas side of the burner. The air mixture adjuster is a clip round the gas inlet pipe to the burner and it lives under the tray. It sounds like this is either adjusted wrongly or is full of fluff (very common). If you are unsure about how to tackle this get the cooker serviced by a gas technician.

[pio]

Electricmonk,

thanks for your input. unfortunately I didn't manage to find a gas service technician who wants to check this ENO equipment, because they all do not know this kind of equipment. They only want to work on th kitchen equipment from Bauknecht and such, working on earth gas with much higher pressure. so with the help of a friend who has some industrial experience with burners I try to solve the problem myself.

we dismounted the whole ENO stove, incl gas pipes, control valve etc. I all cleaned it up and the problem remains, I checked the pressure of the gas presuure regulator and found it also ok.

so I indeed concluded that the reason would be lack of air in the burner. You suggest that there should be an air mixture adjuster being a clip round the gas inlet pipe to the burner and it lives under the tray. But I didn't find anything like that. The burner pot is a closed type and there is only an gas inlet and a gasnozzle. the only way air is coming in the burner is between the upper side of the tray and the crown ring of the burner, which cannot be adjusted. also on the control valve or anywhere else I don't find an air inlet/adjuster. by lifting the crown ring a bit the flame becomes much better, so I indeed believe that it's an air problem. but by lifting the crown ring the thermostatic safety is not working anymore so it can not be a permannet solution. so I wonder how to improve the air inlet.

Read more: jeanneau.proboards.com/post/new/2854#ixzz2idg50CCL

[pio]

I have now made some 3 holes with diameter 10 mm in the bottom of the burner pot and the flame is now much better. So it looks like that there wasn't enough air. As I couldn't find any other method to get more air in the burner I've schoosen for this solution.

[pio]

Now, with the holes in the burner pot, I've tried to cook the potatoes. Without the pan on the cooker and full flame there are almost no yellow points. With the pan on the cooker and full flame there are little yellow points and with the flame lowest there are no yellow points. But with the flame half the flame is almost wholely yellow.
Too much fresh air?