Danfoss Wireless thermostat losing signal

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Hi
Does anyone have experience of these? Fitted one a couple of days ago, sender unit is in the hallway about 10 metres from the receiver in the back room; there's not a direct line of sight between them, there's a brick wall and a corner. Anyway, the receiver keeps losing contact with the sender and when that's happened, the receiver won't respond to me adjusting the sender dial up or down. Then, even when I bring the sender into the same room as the receiver and adjust the dial to request heat on or off, it ignores it and I have to do the whole recommissioning thing again (pairing the receiver and sender) before it behaves properly. I would have thought it should just pick up where it left off? Does this sound like a faulty unit?
Cheers
Malc
 
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Make sure it`s compatible to the boiler, I fitted a wireless stat to duotech, it was a baxi, but they gave me a potterton wireless stat! Baxi, Potterton? same? apparently not!
 
Nah it's compatible, the output from the receiver is just a pair of relay contacts, the boiler just needs a closed/open signal so no problem there.
 
Yeah, but if the receiver aint compatible with the pcb in the boiler it won`t work. The transmitter may be transmitting and the receiver may be receiving but it if it aint compatible with pcb it wont work.
 
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It's a relay signal, that's all the boiler needs.
There's a red light on front of the receiver that shows whether it's being asked for heat by the sender or not; that's the indication that shows that the signal is dropping.
 
The baxi stats plug in to the pcb on the boiler, dunno how the danfoss set up is. Does it plug in to pcb or wired in to roomstat connection?
 
The input for the boiler is just a connecting block; it is intended to have two wires connected to it which go to the switching contacts of a thermostat. Closed = on. That's exactly what comnes out of the receiver of the Danfoss. There's nothing wrong with that; it works. I can duplicate it with a bit of wire, and there's nothing wrong with the connection between the Danfoss receiver and the boiler.
As I mentioned in the first post, the sender and receiver of the Danfoss are losing signal, as can be seen by the red light not going on when it should be (as indicated by the sender unit showing a 'flame' icon).
 
Fine it`s wired in like a roomstat, i beg your pardon, that`s why i asked, I don`t need a lesson on how a transmitter/receiver/hard wired external stat works or other,I was saying how the stat i have used works... i know how a wireless stat works. A Baxi stat is wired in to the pcb so you are knackered at fault finding your transmitter/receiver fault after that, Geddit??
 
Looks that way! It's weird that the receiver seems to forget it's been paired with the sender. I've emailed Danfoss but I'd imagine one of the units is faulty; just wondred if anyone else has fitted one and had similar issues. Ah well.
 
It could be metalwork in the building construction.

Take it back and swap it for the honeywell version.
 
If you wire in your reciever to the same connections as your external roomstat and it wont work, then you put the link back in (you know what I mean) then the boiler fires up, the answer is obvious innit? Dodgy transmit/receiver.
 
If the transmitter and receiver lose connection when they are in the same room, its likely to be a fault with one or the other or both. However, if once synchronised they only lose communication when the transmitter is in the room 10 metres away, it could be a transmission problem. Two things worth trying:

1. The MIs usually suggest keeping the receiver well away from metalwork, for example the boiler itself. If it is too close to a lump of metal, particuarly an earthed lump of metal, much of the transmitted signal could be lost, not leaving enough to communicate. Try re-siting the receiver, even moving it around on a longish cable until you find a good position.

2. Run a piece of thin cable (bell wire is fine) in a coil under the receiver, and the other end as close as you can to the receiver, with due allowance for aeshetics. Don't connect the coil to the receiver, or the other end to anything. It just acts like an old fashioned radio aerial. I've used this successfully over quite long distances.
 
Littleplum2 wrote
Yeah, but if the receiver aint compatible with the pcb in the boiler it won`t work. The transmitter may be transmitting and the receiver may be receiving but it if it aint compatible with pcb it wont work.

Page 32, figure 49 of MIs shows bk1 and bk2 terminal requiring a short circuit to run the boiler in CH mode. TP5000 or similar would apply s/c to said terminals to fire the boiler. TP5000 will be 100% compatible with Duoteck boiler.

OP, check the batteries in the transmitter. Green light should flash when receiver gets the signal to switch. Call Danfoss directly- they have good technical backup.
 

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