I think the point is that the whole reason for the change is that the thermostat is upstairs and the OP finds this less than ideal - correctly.
Fair enough - and, despite the part of the manual I quoted (which makes it sound ideal, connection-wise), you will see from my exchange with BAS that there is actually uncertainty as to whether it really means what it appears to say. However, that was just the first one I came across, so there may be more (including programmable) ones out there. The wording I quoted also seems to indicate that at least some manufacturers do appear to have given consideration to those who want to upgrade from a 2-wire thermostat (like yours).
Yes, I understand all that - but, as you will have seen, I thought (maybe incorrectly) that there were wireless ones around which would do as the OP wants, but with the 'receiver' (the hard-wired bit), as well as the transmitter, being battery-powered, such that he could simply use it to replace his upstairs 2-wire stat. The bit I keep quoting from one of the manuals seems to imply that it was designed for such a purpose - but the spec seems to contradict that! ... so maybe I dreamed it, and such animals do not actually exist!
As I've said, if a device such as I have been thinking about existed, the "point" would be that it would do precisely what the OP wants/needs, in a manner that should be easily DIY-able. He could then simply replace his existing upstairs stat with a battery-powered wireless receiver which only required the two switch wires already present at that location (no neutral needed), and then have the (again battery powered) sensor/transmitter wherever he wanted in the house. However, as I've said, maybe they don't exist.
I don't really understand that analogy. I would have said that what I'm talking about was more like starting with a TV which had no remote facility (all control;s hard-wired on front panel) and replacing its (hard-wired) on/off switch etc. with a wireless (or IR) receiver which could be controlled by a movable (hand-held) remote control.
Yes, I understand all that but there is no need for such a device.
I'm sorry but the normal device fits the OP's needs
Alright, A set without remote, buy IR receiver, stick it to wall behind couch, wire to TV.
The normal device fits the OP's need IF EITHER he replaces the 2-core cable to the present stat location with a 3-core cable OR he locates the wireless receiver near the CH controls, and knows how to wire it. If what I was talking about existed, he would merely have to replace the existing stat with the new receiver - a five minute job requiring no special knowledge.
Maybe I haven't explained clearly enough. I've been talking about 'hiding the receiver' at the upstairs landing location where the current stat is (it could be anywhere, but that's where switching conductors are currently available, hence 'easy' for the OP) and then, as you say, have the transmitter (with sensor) wherever the OP wants.
Only because the OP's needs are misguided because he didn't know how they work.
PRECISELY.
Why would anyone make such a stupid thing?
Yes, we've known that all along, but the OP would probably have diffculties in wiring it, and I thought (maybe incorrectly) that something existed which would make the job much easier for him, as a DIYer.
Just maybe because, if it did exist ...
??as Mr Danfloss (albeit seemingly not very truthfully in terms of the product being referred to!) said:
I expect they assume (not at all unreasonably, IMO) that the existing 2-wire, dumb thermostat is in the right place, and that's where you'd want to put the more sophisticated replacement. Which needs to be powered, something that can't be done using the 2 wires from the boiler.
Yes, It allows a programmable thermostat to be substituted with only two wires available but the OP's requirement was primarily to have the thermostat downstairs.
I must be having a bad day, because I don't understand the logic of that. Why would they regard it as 'ideal' if, as you say, the 'more sophisticated replacement' that one wanted to install in the same place could not be powered by the 2 available wires at that place? I must be missing something!
If you're talking about the wireless sensor/transmitter, that presumably requires no wires at all (the clue is in the "wireless"!), so I'm not sure why they would comment specifically that it was ideal for upgrading a 2-wire stat. I think I must be getting confused!
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