Originally posted by top brake
View Post
I have a Vaillant Ecotec Plus 438 open vented boiler. So my connections are slightly different. I don't have 24V RT, Burner Off and EBus. As shown in the diagram below.
22090566.jpg
Instead I have the following.
ecotecboiler.jpg
I'll try and see what the 7, 8 and 9 correspond to in terms of 24V RT and Burner Off. (Except I'll be ignoring the warning message elsewhere in the manual! - see image)
rbhzqe.jpg
I guess the OT terminals on the VR33 are big terminal block T10 which is connected by the Red jumper wire when you buy the VR33.
Comment