Underfloor lagging

[GRO]

I have an Grant 15/21 oil condensing boiler which is set at 15, I have lagged my central heating pipes under suspended wooden floor, my pipes warm up quicker and the radiators warm up quickly, but I have noticed the boiler cuts in and out about every two minutes, the radiators all warm up about the same temperature, I read online that this could be over cycling , but if the water going back to the boiler is still warm surely it will keep cutting out.the plume of smoke from the flue is clear in colour is there a problem.
Any help would be appreciated.

 

[Exedon]

I would suggest it's working as it should
Most oil boilers your grant included fire at a fixed rate.
So unlike equivalent gas boilers they do not modulate down.
If its coming up to temperature really quickly you could get your oil engineer to fit a smaller nozzle .
Unfortunately not a diy job as you need combustion analysis equipment to make any meaningful changes to a oil burner.
Maybe first work out heat load of your heating system and take it from there.
Maybe ask the mods to move this to Plumbing forum?

 

[GRO]

Thanks Exedon much appreciated.
I am going to book a boiler service. I am surprised the difference lagging the pipes has made, with the price of oil it will be interesting to see if there is a saving on the oil used.
I don’t know how to move this to the plumbing forum ?
Thanks again.