I'll assume you didn't read my post then
TRVs for one pipe system are not, repeat not bi-directional, so as I said you have the wrong valves.
Ps, I assume he run the new pipes from the boiler to connect into the existing htg pipes in the same place.
TRVs for one pipe system are not, repeat not bi-directional, so as I said you have the wrong valves.
Ps, I assume he run the new pipes from the boiler to connect into the existing htg pipes in the same place.