blinding,thanks mate. was going to put a seperate fuse spur in for the receiver unit, so boiler can be isolated seperatly for maintence, thank you for you help, i was planning on doing that but wanted confirmation. wasn't sure whether to use the 24v stat or the 230v terminals.
hi i have a valliant ecotec pro 28 boiler (h vuw 285/5-3), and a siemens wireless thermostat, (RCR10/433)jujst wondered how i go about connecting the reciever into the boiler