Boiler locking out

[Bob Moore]

I have an intermittent fault with an external Worcester oil boiler.
It intermittently locks out and after reset runs again. My condensing waste pipe is connected to a gutter downpipe.
It occurred to me that during heavy rain the condensing pipe may not be able to drain and can cause the problem.

Is this the possible cause of the problem?

 

[Aquarius]

If the condensate pipe is potentially blocked, even just full of water, then yes this can cause the problem of locking out.

 

[Bob Moore]

Thanks

 

[SJB060685]

Yes if blocked it could cause lockouts. The condensing discharge should have an air break where it tee's into to drainage externally.
What's the pattern and frequency of these lockouts? What burner is it?

 

[Bob Moore]

Yes if blocked it could cause lockouts. The condensing discharge should have an air break where it tee's into to drainage externally.
What's the pattern and frequency of these lockouts? What burner is it?

I'm not sure what burner.
Very intermittent.

I'll reset it and see if it trips when we have a downpour.

 

[SJB060685]

I'm not sure what burner.
Very intermittent.

I'll reset it and see if it trips when we have a downpour.

If it was a blocked condensing discharge I'd expect it to lock out and not refire.

 

[Bob Moore]

If it was a blocked condensing discharge I'd expect it to lock out and not refire.

I was thinking that the water can't drain if the water is coming from the gutter and it locks out. When the water in the downpipe has drained allowing the condensing pipe to drain the reset will work?

 

[SJB060685]

I was thinking that the water can't drain if the water is coming from the gutter and it locks out. When the water in the downpipe has drained allowing the condensing pipe to drain the reset will work?

It could do yes, if there was a slow drain.

 

[SimonG]

Never seen an oil worcester lockout due to condensate. It would just drop into main heat exchanger.

Although I have seen one full of water when the 40mm pipe froze and the washing machine filled the main heat exchanger 😮

Can you take a picture of the burner.

 

[Bob Moore]

Never seen an oil worcester lockout due to condensate. It would just drop into main heat exchanger.

Although I have seen one full of water when the 40mm pipe froze and the washing machine filled the main heat exchanger 😮

Can you take a picture of the burner.

I can't take a picture at the moment but it is a Worcester green Star camray 18/25 External oil boiler