Replacing a Danfoss Thermostat

Michael78

Hi
I'm looking for advice on replacing the cental heating thermostat on the wall with a new easy to use model.
Currently I have a Danfoss DP5E wall thermostat. It is in working order but is installed in a dark corner of the hall making it increasingly hard with my ageing eyes to read the display and reprogramme. So I need something new that is clear and I can program from my iPhone.
But I don't know how to choose something compatible.
The Danfoss controls 8 electric radiators as if they were one. That is, they all get turned on or off together. That's fine, I don't wish to change that.
The photo shows what I see when I take the thermostat away from the wall


There are just two wires coming in. There are two AA batteries in the DanFoss. Does this mean it's low voltage ?
Any advice anyone can give me, will be very welcome. If someone point me to specific thermostats that will do the job and be easy for an amateur in DIY to install, even better,
I'll thank you for reading this far !
Michael

EdTheHeaterMan

Hard to tell from that Picture. It may be a 240VAC thermostat. It may be 24 Volts. I'm going to look up that model number DPSE

pecmsg

I see 240volt 50 hz

Jamie Hall

The low voltage batteries are for the electronics in the thermostat. It is, however, switching one leg of the 240 volt supply to the heating elements.

I don't, off hand, know of any wifi or bluetooth compatible thermostats which will, on their own, switch grid power. Any thermostat, however, can be used to do that -- but it has to go through and control a relay which switches the actual grid power.

That wouldn't be all that hard for an electrician to set up, in principle, although since you have only one power leg at the thermostat (no available return there) they would have to get power for the thermostat from somewhere else, and find room for a relay (I'm not sure I see a wall box there for the relay to live in).

Not to mention that you are playing with grid power, so you really need to know what you are doing.

Not really a do it yourself job.

HVACNUT

If it is line voltage, it's a little disheartening to see the wire just poking out of the wall. From the screw holes in the thermostat, it looks like it would mount to a Gem or Handy box. 

Jamie Hall

HVACNUT said:

If it is line voltage, it's a little disheartening to see the wire just poking out of the wall. From the screw holes in the thermostat, it looks like it would mount to a Gem or Handy box. 

Cheeer up, @HVACNUT . It's even more disheartening to see the white wire just clipped off and not properly terminated. Wonder what the other end is connected to?

Michael78

May I sincerely thank those who have read and replied to this plea for help.

I had been hoping that there's a thermostat available that's wifi connected and that has a big enough bright display, (even though it seems it may be necessary to ask a professional to fit it.) So many thermostats seem to have small pale gray characters and miniscule symbols. And worse, depend on button pressing to program. This is 2024 not 1970.

hot_rod

The thermostats used for electric radiant heat are usually 240/ 120V
Here is a wifi model
https://www.suntouch.com/products/hvac-hot-water-solutions/electric-floor-heating/electric-floor-heating-controls/sunstat-commandplus

Michael78

Thank you hot_rod !! I'll have a look