New Williamson H.A. oil (can't get co2 above 9%) ??

tommyoil

If so, whats the head size? Are you firing at .65 with an F-6 head? Bob already touched on the LRFB.

Saggs

Just completed a new Williamson hot air oil install w/ a Centennial front flue. Down fired unit from .75 to .65 to match the house requirements. Using my electronic combustion analyzer I could not get the co2 above 9.6% with both air shutters closed to fullest extent. I checked the flame and retested it w/ my Bachrach and same result. Burner gasket and all is tight, front chamber plate appears tight. Any ideas? I couldnt run unit too long as it was over 80 degs in customers house. I will go back when the weather cools a bit.

Robert O'Brien

Check

the Beckett OEM guide for specs for that combo,static disc,LRFB,pump pressure etc.

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Leo_13

Is the unit

Is the unit rated on it's plate to downfire? If so did you use the right nozzle ie solid or hollow? Solids will get slightly higher CO2. What CO2 reading do the instructions say to shoot for? The few Williamsons I deal with seem ok but I have seen some lesser boilers say 10% CO2 is acceptable. Is the igniter sealed to the burner chassis, no unplugged holes in the chasses allowing air in?

Leo

Saggs

This unit can be fired from an .85 down to a .65. It calls for a solid nozzle. Ignitor is sealed well against chassis. The spec manual calls for 12% co2, I've put a bunch of these in and never seen this before. There must be a big air leak somewhere . I will check pump pressure and static disc for proper sizing?

Leo_13

Saggs

I would check what you already stated. I would also check the hole on the left of the burner to be sure the plug is in it or does it have the wire for the oil valve coming out of it? I would remove the burner and check for seals. I would also change the nozzle, I occasionally see a bad one right out of the vial.

Leo

Jim_47

Downfire

Seems to me there is a baffle on Beckett burners that needs to be installed below .85gph.ALSO>>>>> What is the pump pressure? It may be able to have a .65 nozzle but at what pump pressure?

Saggs

All pump pressure settings are at 140psi- I will check for open holes, missing grommets etc.. Thx for the tips

Charlie Masone

Are you on 2 pipe? If so check for suction line leaks or too much vacuum.

David Sutton_6

Static plate

Try putting a static plate on , it hangs down from the housing inside under the transformer, this is not the one that mounts on the draw assembly, this one clips on above the fan below the trans.

David

Jeff_12

williamson

David, it is called a low fire baffle. You are right as it should solve the problem.

Jeff

David Sutton_6

Thanks Jeff!

Man , i just could not remember the name of it LOL.

CRS= cant remember stuff

David