pre ignition

Robert_17

I had I solved. The nozzle was out of adjustment.
Thanks everybody.

Robert_17

Pre ignition

Help.... I have a service contract with a local company.
I have a 3 year old armstrong forced air furnace with a Beckett Burner. The service company cannot tell me why I am getting pre ignition. Alotr of smoke comes out and that has not happened before. 1 week ago I notice a slight smell of pre ignition. I waited a couple of days to see if it would stop. Instead 3 days later I came home to find my burner would not ignite at all. I callled the service company and they showed up 5 hours later. In the 5 hour waiting period I tried to start the burner 2 times. ( It was getting cold).
The last attempt it started. When the service showed up he said he could not yhelp me because the burner was working. I told him about the pre ignition and he said to let it continue. Well I am know seeing alot of smoke come out my smoke stack. Not to mention the smell inside the house. WHAT IS THE PROBLEM AND HOW DO THEY FIX IT.

Weezbo

it may be incomplete combustion...

that is due to an oil leak after the burner shuts down,or a leaky nozzle, with an electrode burning an arc to the nozzle. oil fired boilers can have a fire in the box for considerable periods of time without it being noticed depending on the firing rate and load.

the black smoke can cause soot that will cover a safety devise that looks for light,smoke from a small fire in the bottom of a chamber can do the same thing.that devise isnt the cause it only monitors the fire chamber. fluxuating oil pressures from drive coupling malfunctions can also produce similar problems.

oil pumps can also present the nozzle with oil that isnt sufficently atomized. this oil can load up and drip onto hot surfaces ... some more remote possibilities include motors ....leaks ahead of the gun ,that leak onto the blower in the burner and spin oil into the chamber that doesnt burn off completely during the call ,yet, is hot enough to continue the burn after the call, also can produce that. a broken shaft in an oil pump could cause simlar problems that frozen oil lines create.

water droplets and ice shards can hose an oil pump, that mess over the operation of the oil delivery to the combustion process.

the smoke from that type of fire sometimes will clear up during post purge for a while. really there are quite a few things that need to be determined and done. usually some indication other than being off on reset is evident on inspection . it isnt something a homeowner can easily recognize ,that is why you need someone there with tools to make the repairs.

[Deleted User]

Robert, I am new to oil

How do you adjust an oil nozzle?