Hello all - first post so be gentle!
Our old thermostat is on the way out and so, combined with the fact that it's very basic, I've purchased a new one. The old one is a Drayton RTS1 and I will be replacing it with a Honeywell CM907. It's connected to a combi boiler. Before I go ahead and swap them over I have a couple of questions
1) The old thermostat has 3 (well 4) wires attached. One blue to N, one red to L, one yellow to 3 and one yellow/green to nothing
Click for bigger
and the wiring diagram for the new thermostat looks like this:
Am I right in thinking that I will not use the blue and yellow/green wires for the Honeywell and just attach the red to A and the yellow to B?
2) Am I right in thinking that I will need to flip off the power at the fuse box before I start disconnecting the old thermostat? If so, any ideas as to which circuit it would be on:
(Click for bigger)
Annoyingly the label was damaged when we moved in a few years ago I would like to avoid switching off the power to the whole house for a number of reasons - primarily because we need our house alarm backup battery changed so that it doesn't go off if mains power is lost...
3) Following on from above, there is a switch by the boiler which turns power to it on and off but I'm guessing that wouldn't cut power to the wires behind the thermostat? If it would then that would definitely be preferable...
Thanks in advance
GK
Our old thermostat is on the way out and so, combined with the fact that it's very basic, I've purchased a new one. The old one is a Drayton RTS1 and I will be replacing it with a Honeywell CM907. It's connected to a combi boiler. Before I go ahead and swap them over I have a couple of questions
1) The old thermostat has 3 (well 4) wires attached. One blue to N, one red to L, one yellow to 3 and one yellow/green to nothing
Click for bigger
and the wiring diagram for the new thermostat looks like this:
Am I right in thinking that I will not use the blue and yellow/green wires for the Honeywell and just attach the red to A and the yellow to B?
2) Am I right in thinking that I will need to flip off the power at the fuse box before I start disconnecting the old thermostat? If so, any ideas as to which circuit it would be on:
(Click for bigger)
Annoyingly the label was damaged when we moved in a few years ago I would like to avoid switching off the power to the whole house for a number of reasons - primarily because we need our house alarm backup battery changed so that it doesn't go off if mains power is lost...
3) Following on from above, there is a switch by the boiler which turns power to it on and off but I'm guessing that wouldn't cut power to the wires behind the thermostat? If it would then that would definitely be preferable...
Thanks in advance
GK