After a bit more thought and discussion with other family members I think we'll stick with the current 3 zones but get the evotouch & dt92s to control them. This would be identical to the system layout described on page 8&9 of the evo-touch application guide, except with three zones instead of two.
It would be nice to have extra zones for the bathrooms and the lounge but I don't think the extra cost of fitting HR80s throughout the house is justifiable to achieve this.
I notice that fitting a BDR91 to the boiler is optional. When fitted does the evotouch perform load compensation (e.g zone valve open but boiler off for part of the duty cycle to modulate water temperature down when close to the setpoint)? If this is the case isn't this direct load compensation, described as dangerous to non-condensing boilers by NeilUK earlier in this thread?
Without a BDR91 on the boiler I assume the boiler is switched on/off only via the opening of zone valves and no load compensation occurs?
With the above described zone-valve based set-up am I right in thinking we could still add a couple of HR80s as additional remote sensors to ensure all areas of a zone are at the set-point?
Thanks for all the feedback so far.
It would be nice to have extra zones for the bathrooms and the lounge but I don't think the extra cost of fitting HR80s throughout the house is justifiable to achieve this.
I notice that fitting a BDR91 to the boiler is optional. When fitted does the evotouch perform load compensation (e.g zone valve open but boiler off for part of the duty cycle to modulate water temperature down when close to the setpoint)? If this is the case isn't this direct load compensation, described as dangerous to non-condensing boilers by NeilUK earlier in this thread?
Without a BDR91 on the boiler I assume the boiler is switched on/off only via the opening of zone valves and no load compensation occurs?
With the above described zone-valve based set-up am I right in thinking we could still add a couple of HR80s as additional remote sensors to ensure all areas of a zone are at the set-point?
Thanks for all the feedback so far.
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