Beckett Burner Problems

Biged

Is it a R7184U OR P? If it is a R7184U the dip switch can be set to upwards of 10min for post-purge so first check that is not the case.

gehring_3

Beckett Burner Problems



I have a Burnham Steamer, with Aquastat, fitted with a Beckett Oil Burner. After the thermostat (or aquastat) is statisfied the burner is supposed to go through a "post-purge" for approx. 10 seconds and then shuts down.

Well, something is wrong as my burner wants to keep running indefinitely after its done making flame. In other words, the "10 second post-purge" has turned into a "will not stop running until the switch is thrown" mode.

What would cause this? What part has gone bad? Is there anything I can try on my end to fix this?

Thanks

Biged

Beckett control

gehring_3

Beckett Post Purge

It is an "R7 184P 1080"

It ran fine until today. Today I noticed it post-puring way too long so I simply hit the breaker and decided to write in for some advice.

What would make it all of a sudden start acting differently when nothing was touched or changed? I bascially have not touched the boiler since the winter months so it is not like I could have accidently changed anything.

Unknown

Post Purge Problem

The last time I saw this happening was on a job that had a real dirty ground connection. On that job the electrician and I both found 26 volts of AC current between the conduit or boiler jacket and L2 of the control (Hot water Boiler). Turns out there was a transformer wire touching the conduit somewhere in the basement. It also turned out that the auxiliary breaker panel that was serving the boiler did not have a source of earthen ground back to the main lug panel.Solid state controls need a good source of ground and correct polarity to operate correctly. I wish I had a more definitive answer but its a good place to start.

Also....do you have the V-8 equipped with a R8239 contactor relay mounted on the upper right jacket panel that has the thermostat and aquastat wiring isolate to it or does your iring go directly to the burner control T-T connection? let me know.

Glenn Stanton

Manager of Training

Burnham Hydronics

www.burnham.com

Leo

This is all controlled by the Primary Control which is one of the safties on your system. Call a pro immediately.

Leo

gehring_3

Beckett


Glenn-

My wiring and ground appear to be in good order. (It is all fairly new wiring and nothing changed today - haven't touched anything) Also my thermostat wires go via the aquastat diretly to the T-T terminals - there is no separate relay on my particular unit.

I just turned the unit back on and it fires up and runs no problem, aquastat says stop and the flame goes out but the post purging keeps on going (I let it run for several minutes on post purge before giving up and fliping the power switch)

gehring_3

Beckett


My wiring and ground appear to be in good order. (It is all fairly new wiring and nothing changed today - haven't touched anything) Also my thermostat wires go via the aquastat diretly to the T-T terminals - there is no separate relay on my particular unit.

I just turned the unit back on and it fires up and runs no problem, aquastat says stop and the flame goes out but the post purging keeps on going (I let it run for several minutes on post purge before giving up and fliping the power switch)

Unknown

Post Purge Problem

If nothing has changed as you have stated, then assumably there is something wrong with the R7184P Primary Control and as already stated by others, it should be replaced as soon as possible by a qualified individual. It is advisable to have this done immediately since if there is something wrong with the post purge circuit then there also may be something wrong with the flame safety circuit as well. Probably a good idea to leave it shut off until then as well.

gehring_3

Primary Control

Glenn-

I took a look at that control unit and it seems to be wired in a fairly straighforward manner. Is it possible to take it somewhere to be bench tested? Also, is that a warranty item? I purchased my V8 new, packaged with the Beckett, in the summer of 03. (Installed it myself that fall as you know - has been running great for 2 heating seasons - dry steam, low fuel bills, etc.) If not I will just buy and install a new control unit, but I thought I should ask. Thanks

REF

5 years

I believe Burnham has a 5 year program that covers the burner too. I'd check it should have lasted longer.

REF

tommyoil

The wiring looks straightforward ???

What does O.K. wiring look like? If you are not familiar with the control or its function my suggestion would be to call a professional at once. It MIGHT be the dip switches or it MIGHT be the control arent answers I'd be comfortable sending you into the trenches with. Find a qualified contractor to check your control to play it safe. Call a pro. Good luck!

Unknown

The warranty

on all controls included with the boiler is only one year. Again, I would have it replaced and/or checked by a qualified individual as burner primary controls are a safety control to keep you and your family safe.

Glenn

Unknown

REF

The 5 and 10 year extended warranty programs are only available through qualified contractors as part of the Home Heating Team program. The standard warranty on controls is 1 year.

Unknown

Agreed Tom!

As I have already stated it is best to have a qualified individual check this one out. This control for the V-8 was not equipped with the DIP switches.

David Sutton_6

do you

Have a power venter??

gehring_3

Straightforward wiring..

Yes. All of the wires are color-coded and the key is printed right on the label of the unit itself - that, in conjunction with the wiring schematic provided in the owners manual, renders this component a "straightforward" (i.e not very complicated) re-wire job if it were to be replaced.

But, back to the main question...aside from a faulty control unit and/or bad ground, what might be some OTHER possible causes of long post-purge? (BESIDES the unit being bad please)

Any ideas? I am just looking for other possible causes (if any) Thanks

watson_2

Air?


Maybe air in the lines is causing the purge to take loner. Also check for a clean filters.

gehring_3

Power Vent


No. I do not. Any other thoughts? Thanks

gehring_3

Power Vent


No. I do not. Any other thoughts? Thanks

John Barnes

Could a leaking valve (in the burner unit) also cause prolonged post-purge? If oil continues to dribble out while the burner is trying to purge itself would the unit sense that and keep running?

Ken_8

The control's probably shot

It's simple. The delay timer solid-state component crapped out and in all liklihood the control needs to be replaced. It should cost well under $100.

Why are we diagnosing a bad control to death. Replace it, move on. I am very doubtful the delay timer component can be replaced without destroying the integrity of the control, so don't even think about that - unless blowing up the house is somewhere on your short list of exciting things to do at home(;-o)

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