November 28, 20214 yr I’m about to start wiring in the control centre for the UFH. It’s a Hetta system that seems great so far except the wiring diagram sent with it doesn’t quite match the box. I can’t find an earth point for the incoming mains and I’m fairly sure it needs earthing. Along with the manifold pump which seems to only have connections to a live/neutral with again no earth. Is this the earth for either or both? tia!
November 28, 20214 yr I would think so but I would want to be sure. I suspect that pair of terminals just join to each other and nowhere else. Personally I would unscrew the boards and have a look at the pcb tracks to confirm that. I have a question. How do the room thermostats connect to that controller? I see no terminals? Is it all wireless?
November 28, 20214 yr Author 1 minute ago, ProDave said: I would think so but I would want to be sure. I suspect that pair of terminals just join to each other and nowhere else. Personally I would unscrew the boards and have a look at the pcb tracks to confirm that. I have a question. How do the room thermostats connect to that controller? I see no terminals? Is it all wireless? thanks @ProDave, good shout - I’ll have a look. Yes all wireless here! Retrofit so not chasing in cables everywhere!!
November 28, 20214 yr Author This is what I have from the back…. Doesn’t go anywhere by my calculations?
November 28, 20214 yr Yep, that looks fine. There is no need for an earth connection to the unit, it is just a means to join all the earth wires together so the pump etc get an earth connection.
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