satchwell to honywell thermostat

[spidderpaj]

hi
i have a satchwell tlx2259 thermostat and want to changer it to a honeywell cm900, on the tlx2259 i have three wires a yellow in No1 - red in No3 and a blue in No4 where do the go in the honywell?
many thanks

 

[Dan Robinson]

1 to A
3 to B
4 to be made safe.

 

[spidderpaj]

many thanks

 

[Dan Robinson]

8)