How A Combi Works In 2.5 Minutes

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How a basic combination boiler works

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The idea to use the drawings like you have is top notch. It’s given me a new approach to teaching process driven knowledge (and other things). Thanks

TheChunder

1) Does a modulating boiler only modulate down the burner, or does it also modulate the rad pump flow rate?
2) is the modulation power (kw) set by the opentherm stat or is the flow temp set by an opentherm stat and then the boiler chooses the appropriate kW?
3) if I use a weather compensating control like a google nest, does that automatically set the boiler output or does it set the flow temperature?

kevinleesmith

It would be convenient if you added the subtitles, cause the voice is too quiet.

watchknowhow

hello,

thanks for the nice video,

i have an Ariston gas combi boiler, the hot tap water temperature fluctuates annoyingly between really hot and warm or even cold, i have many technicians trying to troubleshoot with no success. do you have any clue or suggestion about the cause of the problem and the solution?

FarahWahhab

Seems so inefficient to heat one body of water for it to heat another. Also, do you ever get pin holes an fresh an heating water mixing on the secondary plate?

frankkelly

Excellent basic video on how a Combi Boiler works, simple to understand, it includes, both Hot Water and Central Heating, in 2.5 minutes. Mine is an old Valliant so i am sure it is the same, i doubt you get any better in understanding than this, video. These items are very complicated, and can be a minefield to the untrained person. Thanks for helping understand, and in a way a kid, and adult can understand, and gain knowledge. Just what i needed.

avtardisange