Boiler thermostat - replacing

thorganby

Mutton_Geoff said:

thorganby said:

Mutton_Geoff said:

fenwick458 said:

and would you care to explain why?

Programmable stats trigger the "call for heat" switched live, not the timed circuit.

Anyone capable of reading and understanding the boiler documentation can see that your comment is irrelevant and incorrect.

The timeswitch is redundant, should be disconnected and the relevant link fitted when connecting the programmable stat.

I can read the manual and as an engineer, I prefer to do things properly. I'd still leave the time clock as is and set it to permanently on then wire a programmable stat into the room stat call for heat. The effect is the same but I prefer to do things logically so that if there was ever a fault, future engineers would start looking in the right place.

Engineer or bodger?
The fact is that you obviously did not read any manuals before posting your 'advice' and you would not have thanked southcoastrgi, agreeing with him that wiring the new programmable stat as fenwick458 suggested would blow it up if you had, which shows your lack of basic knowledge.
At least southcoastrgi humbly admitted that he was wrong.
Wiring two timeswitches in series is a complete bodge and certainly not logical.
A real engineer does not make silly assumptions and then state that "I prefer to do things properly"!