What are these components

[2sppandey]

Moved into a new place that has a system Boiler. Can some one pls tell what are the white electrical boxes for?


Need to fit in a nest thermostat on this. I think it will go in the top most White box but just wanted to make sure.

Thanks

 

[ianmcd]

The box at the top RH of your picture is a receiver for a Hive thermostat, why would you want to change that for a nest ? they do exactly the same thing

 

[RandomGrinch]

The box at the top RH of your picture is a receiver for a Hive thermostat,

Looks a bit like a Honeywell BDR91 to me?
So may just be a wireless thermostat for the C/H.
Could the Nest replace the RWB29 for full system control?

 

[2sppandey]

The box at the top RH of your picture is a receiver for a Hive thermostat, why would you want to change that for a nest ? they do exactly the same thing

It's not hive, it's a basic Honeywell thermostat

 

[2sppandey]

Looks a bit like a Honeywell BDR91 to me?
So may just be a wireless thermostat for the C/H.
Could the Nest replace the RWB29 for full system control?

Hi yes it's BDR91

 

[CBW]

Agree with @RandomGrinch, looks like BDR91 (Honeywell) receiver in top left (as I’m looking at it), 2 channel programmer (Siemens) and you have a blanking plate and Honeywell wiring center. For Nest, would need changing at the programmer, or new wiring at the Center. You might need to use the usb lead for the Nest thermostat though, or run a 2 core cable, a Hive wouldn’t as they’re AA battery operated.

 

[2sppandey]

Thanks for your response. So you suggest that I need to fit the nest box replacing this?

 

[CBW]

Yes, that’s the one.

 

[bhm1712]

I think people are getting really confused and offering bad advice here.

The item “top right” and the one highlighted in the red circle is not a receiver for a wireless thermostat. It’s a Siemens RWB29 two channel programmer.

The receiver for a thermostat is top left of the first image.

If you’re wanting to fit a nest heatlink and thermostat, the heatlink would go in place of the RWB29 and the wiring from the existing thermostat receiver would need to be reconfigured to accept the nest thermostat or removed and thermostat 12v fed out from the heat link to the base plate of the thermostat.

 

[Madrab]

I think people are getting really confused and offering bad advice here

??

For Nest, would need changing at the programmer, or new wiring at the Center. You might need to use the usb lead for the Nest thermostat though, or run a 2 core cable

 

[bhm1712]

The confusion I’m referring to is people saying the top RH item is a wireless receiver for Hive.

 

[CBW]

The confusion I’m referring to is people saying the top RH item is a wireless receiver for Hive.

Both myself and @RandomGrinch stated otherwise, so one comment from one poster doesn’t represent people.