Hi, I'm super-confused. My new ST9400C controller, V4043H zone valves and T6360B1028 room thermostat were all purchased as 24v items (eg see https://www.amazon.co.uk/gp/product/B003CSGRIQ/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1). But now that I've got the wiring diagrams it seems they...
