Hi I'm looking for wiring diagrams in the manual for this boiler but none available. I'm trying to wire up a Horstmann wireless thermostat to a valiant Eco plus 837. Which terminals do I use as ther is 3 diagrams on this particulater thermostat? On the boiler wiring it dosnt correspond to diagrams online. You have a 240v connection which is in plus a live link from the live to the terminal next to it which is one of two, the pair have below it written -240v.
Thanks in advance
Dan
Thanks in advance
Dan