Nuiscance G115 buderus

Ray Landry_3

HELP! I've got a g115 buderus that I just can't seem to get dialed in right. Installed three weeks ago, and has been fine until today. Boiler is out on limit. I'm going to check on it now, but one thing that threw me for a loop was the CO2 levels from the burner. They where REAL high. The only way I was able to get them to drop was with the air band WIDE open. Only then was I able to get my CO2 down to an 11.5... My CO was steady at about 20ppm, 02 was around a 6 or 7 if memory serves me correct. My net stack tem was 340ish, breech draft was -.02 Pump pressure was 145, I was originally thinking maybe it's overfired but that doesn't seem to be the case. Only thing I can think of is maybe I got the wrong burner with the boiler, but I'm pretty sure it was a match with the water content I had. Boiler vents into a 7x7 masonary lined chimney approx 24 feet high, I ran fresh air direct to the burner with the proper vacuum breaker, new oil line, general filter at tank, high micron at burner. I'm not understanding what's happening here. The new Line I ran is over head, and not two pipe, but I've always been taught as long as theres no leaks or they don't run out of oil there's no need for a return or a tiger-loop. Of course I could be overthinking all of this and it could be something stupid, but I'm still wondering why my C02 levels where so high.

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=463&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Tom Hopkins

Is

this a Direct Vent?What is the smoke#? All the other #'s mean nothing if you are producing or on the verge of producing smoke.Is this set to specs as far as nozzle size,turbulator,pump pressure etc.?

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

dana_3

g115

the overhead oil line is the problem. put it on the floor, or add a tigerloop, if your firing a 60-b nozzle. try a 60-w. i've found they they run much better with the delavan w nozzles

dana_3

g115

also a zero smoke at 13% is not uncommon

Kevin__Flynn

Ray-

what was the outside air temp on the day of start-up. The warmer the outside air is the higher the CO2 will be.

Just a thought.

Kevin Flynn

Kevin__Flynn

Overhead oil lines

while overhead oil lines can certainly be a nuiscance, unless there is a high vaccum on the oil line this should not cause this issue. Is there?? My thinking however, is that even if there was a high vaccum problem due to the overhead oil line the symptom should be that the burner would be essentially starving for fuel therefore it would be over-aired which would lower the CO2 and raise the O2. I think...

Kevin Flynn

dana_3

g115

quigk rule of thumb.1" vac for every verticle foot of lift. 1"vac for every 10' horizontal run of oil line. riello's will have problems with 8-10"vac. on overhead oil lines

Tim_41

Over head line

I agree with the tiger loop. The riellos will not work with a single overhead line. The pumps may work for a short time but they end up causing a problem because the lift capabilty is very small with the riello.

Kevin__Flynn

Overhaed line

Remember, if the burner is on the same level as the bottom of the oil tank the lift is cancelled out by the equal drop down to the burner. If this is the case, then there should be no added vaccum due to lift. What can happen if the line wasn't purged extremely well however, is that small air bubbles can settle to the high point in the oil line. Over a short time these small air bubbles collect together and create one large air bubble that the oil pump can't pull through. This will show up as a gradually increasing vaccum over time.

Kevin Flynn

lchmb

what goes up

What goes up must come down. I would be willing to bet once the line is properly purged the overhead line has little to do with it. Put a vacuum guage on a properly purged overhead line and you will find you are pulling no more vacuum than if it were on the floor.

Jim Davis_7

12%-14% CO2 are not considered high on new burners. 11.5%CO2 would be considered low. These have to be dialed in with a smoke tester. CO rarely indicates the smoke content of the burner. Off on limit I assume is flame failure. With two oil filters in the line there is a lot of air that has to be removed form the cartridges. This can only be done by pulling a vacuum on them for several minutes. If not you will have loss of prime intermittently for several weeks. The over head line is no problem except when there is air in it. The Tiger Loop can't remove air that is in the lines before it and that would be the only place the air bubbles would normally cause loss of prime, unless the tank is well below the burner. If you have a leaky fitting that is letting in air you need to check the vacuum on the pump and see if it holds. If it does your only problem is the air in the oil filters working it way out. Your CO reading indicates that the nozzle should be okay.

Ray Landry_3

> 12%-14% CO2 are not considered high on new

> burners. 11.5%CO2 would be considered low.

> These have to be dialed in with a smoke tester.

> CO rarely indicates the smoke content of the

> burner. Off on limit I assume is flame failure.

> With two oil filters in the line there is a lot

> of air that has to be removed form the

> cartridges. This can only be done by pulling a

> vacuum on them for several minutes. If not you

> will have loss of prime intermittently for

> several weeks. The over head line is no problem

> except when there is air in it. The Tiger Loop

> can't remove air that is in the lines before it

> and that would be the only place the air bubbles

> would normally cause loss of prime, unless the

> tank is well below the burner. If you have a

> leaky fitting that is letting in air you need to

> check the vacuum on the pump and see if it holds.

> If it does your only problem is the air in the

> oil filters working it way out. Your CO reading

> indicates that the nozzle should be okay.



Thank you all very much for your help I am going out later on this and will let you know what i find

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"