Hello. I've purchased a new Hive 2 system for my combi boiler to replace my current Honeywell ST9100A programmer and wired thermostat. The boiler is an Alpha CD28C combi installed around 4-5yrs ago
Looking at the programmer, I plan to of course wire the earth, L and N up, but need some advice on the wires in slots 1 and 4 of the Honeywell, presumably 1 is common and 4 is the heating on wire? If thats the case, what would be in the connector block? The current thermostat wiring would then be removed completely?
I've included pics of the current wiring, along with diagrams for the Hive and Honeywell programmer.
Looking at the programmer, I plan to of course wire the earth, L and N up, but need some advice on the wires in slots 1 and 4 of the Honeywell, presumably 1 is common and 4 is the heating on wire? If thats the case, what would be in the connector block? The current thermostat wiring would then be removed completely?
I've included pics of the current wiring, along with diagrams for the Hive and Honeywell programmer.