The new stat/timer is installed and working great. Manual clock/timer is left always on and the stat is wired directly to the board (on far left side).
FYI, the blue and brown wires power the clock, and the two black wires are the switch. Don't wire blue and brown to the CM907!
I'm planning on disconnecting the timer completely, as the Honeywell is a stat and 7 day timer.
Am I correct in saying the blue and brown wires are used to power the clock, and the 2 black wires are the switching ones? I'm going to isolate the blue+brown and use the 2 black to the A and B...
Help! I'm trying to replace the mechanical clock on a Baxi combi boiler (80e). It's got a round mechanical clock with 2 black, 1 brown and 1 blue wires. I tried connecting the blue and brown to the Honeywell cm907, but this blew the boiler fuse... Should I have used the black wires instead? (The...