Delay before turning boiler on when using thermal actuators?

[CurlyHutty]

Hi folks, I have looked for an answer to this but not come up with anything... maybe some experienced people will be able to advise.

I am installing an 8-zone underfloor heating system, with a thermal actuator on each zone.
I have a wiring centre that will open the relevant actuator when there is a call for heat from any zone, and will turn on the boiler if there is one or more zone calling for heat.

However, since the thermal actuators will take 3 minutes to open, then each time only one zone (the first zone) calls for heat, all the actuators will be closed - and the boiler will presumably cycle a few times (just pumping a tiny volume internally through the by-pass valve), before the actuator has opened.

So should there be a 2-3 min delay before activating the boiler after the first actuator-open signal? Or maybe I am worrying unnecessarily about this.

However I did see on an expensive wiring centre that it had the facility to switch on 'boiler delay', but there was no documentation about when this would be appropriate.

Boiler is a new Vaillant EcoTech Pro.

Thanks for your advice.

 

[Aquaheat]

Need more info on the UFH system/wiring centre/boiler

A few pics would be nice as they are worth a 1000 words

Jon

 

[simond]

Some UFH wiring centres have this delay. Some UFH wiring centres use 4 wire actuators...

But at the end of the day, you are worrying unnecessarily.