The Efficient Home Forum

Hi, having fitted a full evohome system before using opentherm and underfloor, having moved into a new build recently, I've decided to fit it again.

I have a Valiant ecotec boiler which is quite far away from the cylinder. The set up is a 2 zone plus HW, so 3 zone valves. My plan is to remove the upstairs zone stat and fit the evohome controller in the position of the down stairs zone stat. I will be following the Y plan wiring schematic.

Couple of questions...

The Vaillant boiler I understand has a pump live feed, so in the wiring I'll connect the pump live to that.

The boiler also has the full mains plus an RT connection, which I presume is the switched live for the above circuit? The main live fitted as permanent.

Also, I presume I'm fine wiring the two heating zone valves together.

Thanks

Tim

Hi Tim,

Why would you follow the Y Plan diagram, if you have S Plan Plus?

Best diagram to use when using smart TRV's is page 46 of the latest evohome installation guide.

Any support you need on this, just call Resideo technical support on 0300 1301299.