Nozzle flow rates

S Ebels

Does anyone have or can anyone point me to a chart that give flow rates for oil nozzles at different pressures?

Specifically, I have an F-10 on a G215 Buderus that is set up with a 1.75 running 185psi. I have to think this is above the recommended firing rate of 2.1gph for this boiler. It lights of with a WHOOMP which can be heard all through the church. Rather distracting during the middle of the pastor's sermon. Can't seem to get rid of the hard light off.

Weezbo

F10? i go looky thru my riello books.

J.C.A._3

Steve,

My Beckett chart shows that to be about 2.35 GPH.

How are the electrodes set? Birdies tell me that they should be 3/16-5/16ths apart and that will smooth out the light off. Merry Christmas and try this before the midnight service if you can! Chris

Joe@buderus

G215

With the pump pressure and nozzle, it is slightly overfired. As suggested check electrode spacing, check that draft at breech is at negative .02. Let us know how you make out.

Alan R. Mercurio_3

Merry Christmas

Your friend in the industry,
Alan R. Mercurio

www.oiltechtalk.com

Weezbo

so ...did you down size the nozzel a bit or put the pump

pressure down or change the angle of the dangle nozzle,did the e-mail make it to you?

S Ebels

Thanks guys

I can see from the charts, my hunch was correct. Drew and I played with it on Wednesday night til about 10PM and wound up setting the pressure back to 150psi just on a by guess or by golly basis. It lights off a lot better but it's still not what I have come to expect from a Riello/Buderus combination. We're going back armed with a bunch of nozzles with different patterns, flow rates and spray angles. We had to set the burner head almost all the way out to get it to not rattle the windows when it lit even with the lower pressure. Electrodes are gapped a small 1/4". Draft is negative .02 WC" with the burner running. Didn't check the overfire value.

Steve_35

The formula to figure flow rate is

Old flow rate * square root(new pressure / rated pressure.

So in this case it would be:
1.75 * sq rt(185/100) = 2.38gph

Unknown

I love the Riello burner , but .......

I never had an F-10 with a clean fire on a new install . By eye it looks like the flame is very sloppy - all over the place . We haven't tried one in a Buderus though . It's been Peerless or Burnham . Every time I would go over the whole burner with a magnifying glass - adjust pump pressure , try every spray pattern and nozzle type , play with the air damper and nozzle assembly settings . And of course , we check the draft beforehand . I always give up and downfire a few sizes and call our service department .

I have to say we never have a problem with the F3 , F5 or F15 in any pin type cast or steel boilers . A bit of trouble with an F5 in a Buderus G-214 . It was not a burner problem though . I've been asking our sales department to sell either a Beckett of Carlin in boilers where we would use the F10 . It ain't worth the extra few hours to troubleshoot .

Rusty_2

Had some issues with the riello/buderus 215 combo. Found that following setup as listed by buderus (supercedes riello specs) produced a dirty, lousy flame. Cleaning it up resulted in ignition failure. Finally solved by using riello's specs, and setting the electodes at a full 5/16. Happy as a clam now, but was the 3rd 215 with this problem.

PS. if memory serves, the 215 is a positive pressure boiler, so nix the -.02 over the fire. Remember Joe's -.02 at the BREECH.
PSS. Found a 215 with an AFG burner recently. Worked for a while, but not long. Melted the end off the burner, looked like a plugged cannon barrel from a bugs bunny cartoon.
Replaced with an AFII. More betterer!