Looking to Installing Honeywell TR6 Smart Thermostat

[PatrickJD]

Hi all, need some advice. I've got a Combi boiler (Baxi) which has a wireless thermostat setup (Siemens RDJ10RF and RCR10/433-GB). I'm looking to replace it with a Honeywell TR6-HW Wireless setup. It looks fairly straightforward but the wiring currently installed looks different from the instructions from the Honeywell website. Should I go for the Honeywell instructions, or follow what was previously installed.

From what I can see of my boiler, the mains cable goes directly to the boiler, and from the boiler there is a cable that goes to the Siemens receiver box and is wired as per the image.

Honeywell Instructions:

Any advice appreciated.

 

[CBW]

Without opening the boiler up and use existing wiring connect Siemens to Honeywell as follows:

L - L
N - N
L1 - B (green/yellow and sleeve it brown as it’s being used as a line conductor)
Link L - A using the existing brown piece of wire

If you tell us the model of Baxi, it might be opentherm compatible, which gives better control over your heating. Make sure if you’re getting the T6 get the T6, not the HW version, as you have a combi boiler which delivers hot water on demand.

 

[PatrickJD]

Thanks for the reply. So basically replace the Siemens receiver with the Honeywell receiver as is (but change G/Y sleeve to Brown)

Boiler is a Baxi Neta Tec Plus 33

The Thermostat is this one: Honeywell Home T6R Wireless Smart Thermostat — W-iFi App-Enabled to Save Money and Improve Efficiency — Compatible with Apple HomeKit, Google Home, Amazon Alexa and and IFTTT, Black (1 Piece) : Amazon.co.uk: DIY & Tools

 

[CBW]

Yes basically the same, but you do have OT capability, but removing the cover on that boiler is a job for a gas safe registered engineer. I don’t know if this isn’t the same, but it’s cheaper: https://www.jtmplumbing.co.uk/centr...7BIcS8_mzytSImPDbnl3Mn7FYgTl7RqxoCfSwQAvD_BwE

 

[muggles]

Yes basically the same, but you do have OT capability, but removing the cover on that boiler is a job for a gas safe registered engineer. I don’t know if this isn’t the same, but it’s cheaper: https://www.jtmplumbing.co.uk/centr...7BIcS8_mzytSImPDbnl3Mn7FYgTl7RqxoCfSwQAvD_BwE

Out of stock though - that's the old model which they presumably discounted to sell through