Swapping thermostats

[SimonB2008]

Hi there!
I’m trying to swap a wired Lifestyle P111 heating programmer with a Netatmo thermostat.
The Lifestyle has a blue, red and yellow wire and the Netatmo requires only two wires.
I think I need to isolate the blue and connect the red and yellow to the Netatmo, but any advice would be greatly appreciated.
Photos attached.
Thank you.

 

[Leesparkykent]

Doesn't the boiler relay have brown, blue, black and grey?

 

[SimonB2008]

Hi Lee, thanks for your reply.
I did not intend to connect the boiler relay to the boiler - I’d intended to use the plug in relay and switch out the heating controller for the Netatmo Thermostat. Main reason being I didn’t want to be left with a hole in the kitchen tiles.

 

[buzzlightyear]

the lifestyle is for system boilers and open vented only. what type of boiler have you got.

 

[SimonB2008]

the lifestyle is for system boilers and open vented only. what type of boiler have you got.

Hi Buzz.
We have a Worcester Combi boiler. There’s no hot water tank.

 

[Leesparkykent]

Hi Lee, thanks for your reply.
I did not intend to connect the boiler relay to the boiler - I’d intended to use the plug in relay and switch out the heating controller for the Netatmo Thermostat. Main reason being I didn’t want to be left with a hole in the kitchen tiles.

You want to install the thermostat in the kitchen where it will get hot from cooking etc? This will not give you a true reflection of the houses temperature.

 

[Leesparkykent]

Do you have an existing thermostat as well as the single channel programmer?

 

[SimonB2008]

You want to install the thermostat in the kitchen where it will get hot from cooking etc? This will nor give you a true reflection of the houses temperature.

Good point Lee. So I’d be better attaching the relay directly to the boiler and using the Netatmo in wireless mode.
Would I be right in thinking that by doing this I’d also be disconnecting the old Lifestyle programmer and so would not need to insulate the wires in the kitchen?

 

[SimonB2008]

Do you have an existing thermostat as well as the single channel programmer?

No Lee -at the moment there is no thermostat in the house, just the programmer In the kitchen.

 

[Leesparkykent]

Good point Lee. So I’d be better attaching the relay directly to the boiler and using the Netatmo in wireless mode.
Would I be right in thinking that by doing this I’d also be disconnecting the old Lifestyle programmer and so would not need to insulate the wires in the kitchen?

Yeah it would be better to use the relay so you can position the thermostat in an appropriate position. You could put a blank plate on to cover the hole in the tiles. The cable that goes to the programmer is probably connected to the boiler and could be disconnected.

 

[buzzlightyear]

the thermostat needs to be in the coldest part of the building possible hallway
and not near a radiator .

 

[Leesparkykent]

I would position the thermostat in the most commonly used room, out of direct sunlight and out of direct drafts from doors opening etc. Make sure the room you install the thermostat in doesn't have a thermostatic rad valve. If it does you could change the TRV for a lock shield valve or simply turn it right up and remove the head or if it won't be fiddled with then just turn it right up. This way the thermostat and the thermostatic rad valve will not conflict with each other.

 

[SimonB2008]

I would position the thermostat in the most commonly used room, out of direct sunlight and out of direct drafts from doors opening etc. Make sure the room you install the thermostat in doesn't have a thermostatic rad valve. If it does you could change the TRV for a lock shield valve or simply turn it right up and remove the head or if it won't be fiddled with then just turn it right up. This way the thermostat and the thermostatic rad valve will not conflict with each other.

You’ve been incredibly helpful Lee, much appreciated. Now I just need to identify the thermostat terminals in the Worcester 28cdi and I’m good to go!

 

[buzzlightyear]

http://www.newtonnet.co.uk/house/boiler/servicemanual.pdf put this on hear for you.

 

[SimonB2008]

http://www.newtonnet.co.uk/house/boiler/servicemanual.pdf

Thanks Buzz, I’d just found this and was having a look. The diagram shows clearly where the LS / LR terminals are - I attached the black and grey relay wires to that, and then blue and brown wires to the power supply terminals. I’m guessing the wires for the prgorammer will be in the power supply terminals at the moment so i’ll take those out.