Anti cycling

[Grampy]

What is Anti Cycling mode please ?

 

[Technotim]

Is it not when Plumbers and heating engineers are trying to get home late on friday night stuck in traffic and some lycra wearing suited Toff jumps the red light sticking his fingers up at you.

 

[Grampy]

Is it not when Plumbers and heating engineers are trying to get home late on friday night stuck in traffic and some lycra wearing suited Toff jumps the red light sticking his fingers up at you.

That's really unhelpful

I thought I would get a sensible answer here but obviously I'll have to look else where

 

[ajstoneservices]

Anti-cycling control reduces on/off cycling, increasing efficiency of the boiler and reducing fuel costs.

From a well known boiler manufacturer.

 

[Grampy]

Thankyou ajstoneservices that helps.

 

[mrshr]

I know this is an old thread but I have the same question.

When/why do boilers go into anticycling mode?
My understanding is it happens when the return temp is too close to the flow temp. (i.e. not enough of a differential between the two flow temps)

Is that right or is it far more complicated than that?

 

[Dan Robinson]

When the boiler goes above Tmax and there is still a demand from the external controls.

 

[mrshr]

When the boiler goes above Tmax and there is still a demand from the external controls.

So nothing to do with flow/return differential?

I'm just trying to find info on Tmax.

 

[Dan Robinson]

Not directly.

Tmax = boiler setpoint.

 

[mrshr]

I take it boiler set point is different to flow temp?

 

[Dan Robinson]

No, but it can be changed in numerous ways depending on the boiler and the controls.

 

[mrshr]

So I thought when flow temp reaches the setpoint (and there is still call for heat), the boiler simply goes into condensing mode?

 

[Dan Robinson]

No. Condensing "mode" (dunno where/why that phrase has come into the lexicon) is when the return is below Dew point.

 

[mrshr]

Dew point!! More jargon!! I'm looking that up now!!

Is there a glossary somewhere that lists all these buzz words and describes how boiler controls operate?

 

[Dan Robinson]

Their not buzz words. They're names for actual things in boiler control strategy and combustion theory.

Dew point is to do with the temperature water condensing back to liquid from flue gases - varies depending on many things.

There is no "mode" that switches condensing on and off.

There is no single glossary for this stuff.