So I've disconnected it all now and put back my existing Honeywell thermostat so the wife can have heating on
Contacted Google who are going to replace the unit for free and hopefully will be up and running no problems by the weekend Basicay I used the exact wiring as previously posted by MikeyD
No agreed but it was the most relevant post to my config when searching, and if it's good it's never too old
Anyway yes unit was installed by qualified electrician, and have checked supply at terminals and appears to be wired correctly with expected voltages.
I've contacted Google nest and as...
SO I;ve jsut got around today to wiring up the heatilink to my turbomax plus 824 as per the instructions below provided by MikeyD which seem to work for most others with this combination. However once completed boiler turns on but Heatlink appears totally dead, no power light nothing and...