Originally Posted by
Paulharr
Cheers guys, turns out I was right and wrong. The orange wire from the valve wasn't getting live but that's because the overheat stat on the tank was stopping it. This is because whilst the Honeywell thermocouple in the thermowell of the tank was reporting low temperatures, the tank was actually hot. I will need to improve the Honeywell thermocouple.
I am a chemical engineer so this type of thing is fun for me, but I can imagine that the average member of the public would not want this hassle to get hot water and heating!
Next job, balancing 23 radiators until I can afford to buy 23 evohome TRVs!
Any other good advice on this system? When I replace my bathrooms I will install electric underfloor heating in these and have these connected to the Evohome (based on advice already from here instead of a wet system).
THanks again guys.