Drip Feed Method?

[jls]

Hi All,
Can someone enlighten me to what exactly the "Drip feed method" is when it comes to measuring the oil feed rate of a Rayburn 368K? I've searched the net and asked oil engineers and I can't find any reference to such a method other than in the Rayburn installation instructions

[john]

flow rating on a vaporising appliance is carried out by measuring the rate of flow from the oil into using a measuring cylinder usually over a period of 3 mins to give an accurate assesment of the fuel rate . On the cooker side it will literally be a drip feed with 4cc at low, and 13 cc at high will give a fairly rapid drip. The problem however is that when the appliance heats up the oil control , then the carefully set rates will change and you may have to adjust again for a decent flame picture.

Boiler side of a 368K is mega fiddly cos you have to have a 240 v supply connected directly to the solenoids so better to adjust based on flame picture

[jls]

Thanks John, I thought that would probably be it but I was confused by mention of adapters. On a slightly different tack, how does the oil level in the burners tie in with flow rate? Is it simply a case of getting the fuel to the wicks in the cooker burner and not overflowing the pilot well in the boiler?

[john]

Hi Jls
At initial set up the depth is set at the boiler burner using a dipstick and I seem to remember 16 mm as the figure . The oil control is raised / lowered to achieve this, with the solenoids hot wired .
The cooker burner level is then set by adjusting the three screws which it stands upon to give a set depth . The depth is chosen for adequate oil to the wicks without the fuel flowing/boiling over more or less as you thought.

[jls]

Thanks John, I'll be having to set the boiler level again anyway when I try the replacement boiler but do you think that might be the source of the explosive ignition that I mentioned in another thread ?