Oil furnace build

[dallen]

(07-14-2015, 06:43 PM)Pete O Wrote:

(07-14-2015, 07:32 AM)dallen Wrote: drill and thread a hole in the side of the pipe and hook up a gas bottle with an adjustable regulator on it,

remember that the blower is always turned on first, before turning on the gas bottle.

you may also need to do like some do and put a dump valve between the blower and the furnace to control air, or make some type of damper, something as simple as a piece of card stock over the inlet will control air flow.

So does that mean that with the blower on, it is no more complicated than just getting some gas into the pipe? No jets etc to worry about? I've had a look at some gas burner setups online but they are all on systems that are set up to use gas as the main fuel, so a bit more involved in the gas burner. I was thinking of a tube that could be inserted into the side of the air pipe with a hole directed downstream and a small ball valve, such that the whole thing could be shut off and withdrawn once the oil is burning. I think I have a piezo igniter in a drawer somewhere too, could be fixed in the pipe downstream from the gas inlet.
Something that is not clear to me with this system is whether the gas should burn inside the pipe or only where it exits the air pipe inside the furnace.

with a burner with a blower on it you don't need an orfice as the blower is providing the air, on a Burner that sucks in the combustion air by the gas exiting an orfice which causes the air to get sucked in to the vacumn that's created.

To make it pretty simple no you don't need and orfice in your burner if you are going to use a blower.

I worked on burners that were as big as 750 million BTU's and the gas was just a free flow into the burner body.

My burner which has been copied and modified by a lot of people on the net just dumps the gas into the air stream where its mixed. you want I can find some photos

I have a little project I'm going to be pouring in a day of two I'll video it and post the link so you can see how I run mine.