Esse Sovereign (Oil burner: Cooker and Central heating)

[essehelp]

Hello, I am new to this forum and I am a bit unsure of protocol but I have a question about an Esse sovereign (cooker and Central Heating). Its an Oil burner, as basic as it gets, its been serviced repeatly (I think the engineer is confused as us!), chimney drawing perfectly, oil flow at the correct level, air flow good, but continues to burn with a yellow flame...any suggestions? as its only achieving a luke warm heat on any setting and its a bit chilly here! Help most appreciated!!

 

[mysteryman]

You may be getting either too much oil or not enough, also the draught may not be correct.

When set to the correct theoretical minimum oil flow rate, there is not enough oil for the flame to fill the pot completely. This gives a dirty yellow flame and will soot up the pot quite quickly. You can increase the flow rate gently by the control knob until it just fills the pot with a blue flame. Similarly, maximum flame as set may be a bit too much.

The pot and oil entry tube need to be clean and decarbonised at each service; this may need to be twice a year. The flue ways above, below, beside, and behind the top oven need to be brushed and vacuumed clean.

There are several different burner pot sizes on these cookers, giving differing heat outputs. Some of them were badged as Cleopatras.