Buderus set up question

Pinball

I just recently installed and set-up a few Buderus G-115 boilers with Beckett burners. On the initial start-up, all of them had so much air that the fire actually was being blown out! Factory nozzel size was .85gph The Primary air band was almost wide open and the secondary is open to the 10 mark. By closing the primary down I was able to get it to run smooth. 0 smoke but the C02 was over 16% !! By adjusting it I was able to pull down the C02 to 13.5% @ a 250* net stack.Since I don't have alot of experience with Buderus. Is this a normal way Buderus ships the units? or is this THE most efficient oil boiler/burner on the market!? I was always taught that a C02 over 12.5-13 is dangerous and the net stack should be at least 300* Are they comming off the line with nozzels that are too small?
Thanks for all your help. This one has me amazed and baffled. :)

dconnors

a few comments

Is the pump pressure set right? what chimney are you venting into? Is the burner an OEM or an off-the-shelf? We do have removable baffles and the capacity to increase the nozzle size. 1-800-BUDERUS ext. 137

Pinball

Thanks for the reply .
First, they have been OEM burners. Second, I did'nt check the pump pressure (asumed it would be right form the factory) and yes I know what assumtions do.:) and third, it is vented into a conventional 7 inch flue that has a new s.s. liner. I was'nt aware of the removable baffles to raise the stack temp.(good Idea) and I was alittle leary about useing a larger nozzle (it won't short cycle?)how large can I go without getting into trouble? These are hooked up to a low temp radiant system w/ indirect dhw.
Unfortunatly, during normal business hours I am on the road working in areas with almost no cell service, and new construction sites w/ no land line either. So I was hoping I could get a few tips here, and maybe baseline readings to compare to.
Thank you
Al

Robert O'Connor_6

Check

and verify everything is as it should be on a new oil install regardless of manufacturer.

Here is what I do:
Check the nozzle for tightness . Check electrodes. If it has an adjustable head see that it is at the reccomended setting. If it's fixed head set the z dimension. Bleed pump and check safety timing. Check pump presssure

Then I do complete combustion test and adjust accordingly

Regards

Robert

ME

Wayco Wayne_2

Hey!

I've started up 3 ol fired Buderus boilers this Fall. 2 Riello's, and 1 Beckett. All 3 have has clogged nozzles from the start. Icanna splaine Lucy but I'm starting to order an extra nozzle when I install them just to have on hand. Mayby when they test them before shipping something is getting in that coagulates and causes a restriction. I don't normally work on oil fired stuff, just love to pipe boilers though so I don't turn them down. WW

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Pinball

Hey Wayne!
Yup one of the three I had to replace the nozzle. It was plugged right out of the crate. Hmmmmmm? maybe your onto somthing.