Condensing Boiler

[John.g]

Not sure where I picked this up but it does show a very low flue gas temperature, presume the boiler was allowed sufficient warm up time.

 

[SJB060685]

Not sure where I picked this up but it does show a very low flue gas temperature, presume the boiler was allowed sufficient warm up time.

Dated 16 of June last year, so a reasonably recent service.
Figures look good.
When commissioning a burner it should be set up from cold but usually the burner will have been running 10-15 minutes.
Also when commissioning a new install the burner is loosely set up and then the technician returns two or three days later to set up properly once the boiler has had a chance to burn off any impurities from construction, otherwise your readings would be all over the place.
The flue gas temperature of 56°c suggests the boiler is condensing nicely.
The CO² % is an indication of the level of combustion, so I higher CO² % and lower flue gas temperature = greater efficiency, however you always have to allow a certain amount of excess air for complete combustion. The CO ppm is acceptable though.