AK wrote:
Related to the "Jobs are too small" thread below. I have been encourged by
some of you to at least have a go with trying to do the thermostat myself
with your help and guidance, so here goes!

I currently have a Drayton room stat like this one http://tinyurl.com/25kle

I want to replace it with Honeywell CM67.

I have looked at the wiring on the Drayton and it is as follows:

Blue wire to N
Red wire to L
Earth (green & yellow) to earth
Yellow wire to a terminal numbered 3

I have looked at the instructions (and I've looked inside) of the honeywell,
there are 3 terminals, which is my first confusion as I have 4 wires! They
are labeled (A), (B) and (C). On the instructions there are 4 wiring
diagrams that are double dutch to me!! I have looked at the honeywell
website to see if they have installattion manuals I can refer you to but
they don't for this thermostat, just the RF version which looks very
different from this one.

I know this is a popular thermostat as I got the recoomendation from here,
so hopefully some of you will be very familiar with it and you can tell me
exactly which wire goes where and what I do with the left over one????

Thanks in advance.

Angela


Angela,
As repeated from my other post, thermostats are at mains voltage so turn
everything off before you start.

I suggest you unscrew the existing thermostat and peek inside, how many
wires have you actually got in there?

Secondly, what controls when your heating comes on at present as you may
need to consider how it will interact with the CM67?

Nick Brooks