BDR91 / Y87RF2024 - No permanent live feed

[D_Hailsham]

The Y87RF2024 is just a thermostat; it is not a programmable stat. So the OP still needs the existing programmer.

There is a way to do it, but it all depends on having four wires to the existing stat.

 

[stem]

The Y87RF2024 is just a thermostat; it is not a programmable stat.

According to Honeywell, when the RFG100 Mobile Access kit that the OP mentions in his first post is added, it also adds programmable stat functions.

• Install the Single Zone Thermostat with internet control:: just install theRFG100 Mobile Access Kit at the same time
• Use as a Programmable Thermostat: Once connected, you can also use the Total Connect Comfort App to provide a combined time and temperature profile of 6 time periods a day variable by day for each of 7 days

This would cost the OP of course, hence my suggestion:

Alternatively, take it back and instead buy a wired programmable thermostat and swap it for the existing thermostat.

 

[Dan Robinson]

The Y87RF2024 is just a thermostat; it is not a programmable stat.

Oh dear....

 

[Dan Robinson]

https://drive.google.com/file/d/0B6V-Gyu0ykkgS0hqR0NlUVhSRWM/view?usp=sharing

 

[Dan Robinson]

Nothing quite like RTFM

 

[D_Hailsham]

The Y87RF2024 is just a thermostat; it is not a programmable stat.

According to Honeywell, when the RFG100 Mobile Access kit that the OP mentions in his first post is added, it also adds programmable stat functions.

And when your smart phone, router etc develops a fault you are left with just a thermostat. What then will be the fail-safe condition?

 

[Dan Robinson]

No you're not. Schedules are stored on the Rfg100. Which doesn't need the Internet to talk to the thermostat.

Must try harder Mr Hailsham.

 

[Dan Robinson]

The Y87RF2024 is just a thermostat; it is not a programmable stat.

According to Honeywell, when the RFG100 Mobile Access kit that the OP mentions in his first post is added, it also adds programmable stat functions.

And when your smart phone, router etc develops a fault you are left with just a thermostat. What then will be the fail-safe condition?

You're getting confused with Tado.... that is internet dependant IIRC>

 

[D_Hailsham]

No you're not. Schedules are stored on the Rfg100. Which doesn't need the Internet to talk to the thermostat.

So the app on your smart phone talks directly to the RFG100?

 

[Dan Robinson]

Via the router and interweb.

The stat talks to the Rfg100.

 

[Simon Shaw]

Thanks all - RFG100 it is then.
The whole idea of the wireless stat is so that it can be in the Living room, as the Landing (where the current stat is) can be a very different temperatures (either much hotter and colder) than the Living room, and I don't really want to start having to get wires to a stat in the Living room and having to redecorate. So a replacement stat. on the landing isn't really the idea - but agree it would be cheaper.
For the moment I'll just leave the ST9400C programmer to be on 24/7 and longer term re-wire so the BDR91 has a permanent live.

 

[stem]

Just remember for correct operation, the radiator(s) in the room where the thermostat is sited, should not have Thermostatic Radiator Valves (TRV's) fitted. All other radiators should have them.

 

[Phill Peck]

Is your current thermostat on the outside of your airing cupboard?