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My existing British Gas RS1 room thermostat is in the hall and as I understand my central heating room temperature is controlled by this thermostat. The boiler is a Gloworm Ultimate and the heating and hot water programmer is a Honeywell ST6400C.
The RS1 is not too accurate and I wish to replace this with a Honeywell DT90E, this should give greater accuracy whilst, hopefully, retaining simplistic operation (I am a bit of a simpleton)
This is the wiring for the RS1, there is also an earth wire arrached to the back of the box.
Blue is neutral(N), red is live(L), yellow is attached to at terminal (3)
This is the Honeywll DT90E wiring terminal. It 3 connectors with screws A, B and C
I have tried wiring the DT90E as follows Red wire to terminal A (L), Blue wire to terminal B (N) and yellow wire to terminal C. The i turned the power on it tripped and blew the fuse at the socket which served the central heating programmer.
Looking on line it seems that I may only need to connect the new thermostat to 2 wires.
My question, how to I wire the new thermostat, which wire should go to terminal A, which wire to terminal B, if any, and which wire to terminal C, if any. Hopefully someone can help and thanks in anticipation. I am sure if I knew what I was doing it is relatively simple, for now I have put the RS1 back and all is working as it did.
The RS1 is not too accurate and I wish to replace this with a Honeywell DT90E, this should give greater accuracy whilst, hopefully, retaining simplistic operation (I am a bit of a simpleton)
This is the wiring for the RS1, there is also an earth wire arrached to the back of the box.
Blue is neutral(N), red is live(L), yellow is attached to at terminal (3)
This is the Honeywll DT90E wiring terminal. It 3 connectors with screws A, B and C
I have tried wiring the DT90E as follows Red wire to terminal A (L), Blue wire to terminal B (N) and yellow wire to terminal C. The i turned the power on it tripped and blew the fuse at the socket which served the central heating programmer.
Looking on line it seems that I may only need to connect the new thermostat to 2 wires.
My question, how to I wire the new thermostat, which wire should go to terminal A, which wire to terminal B, if any, and which wire to terminal C, if any. Hopefully someone can help and thanks in anticipation. I am sure if I knew what I was doing it is relatively simple, for now I have put the RS1 back and all is working as it did.