ESI ESRTP6C to smart thermostat help

[matty2583]

Hi all, I’ve tried following a similar post but mine is showing different wiring, as the title suggests I have the ESi esrtp6c thermostat on the ground floor and another on the third floor. I was wondering if it was possible to fit a generic copy Wi-Fi thermostat and if so how? I’ve added pics of the wiring of thermostat fitted currently and a pic of the thermostat I’d like to replace it with for the Wi-Fi feature. Any help would be much appreciated I’m aware a link wire needs to be added but not sure to which terminal.

Many thanks

Matty

 

[MNW67]

How about a straight swap for the WiFi version?

ESI Wi-Fi Programmable Room Thermostat ESRTP6CWF

www.plumbarena.co.uk

ESI Wi-Fi Programmable Room Thermostat ESRTP6CWF​

If you have the ESRTP6C located on the wall within a new build property you can upgrade your thermostat to a ESRTP6CWF WIFI Model.

 

[matty2583]

How about a straight swap for the WiFi version?

ESI Wi-Fi Programmable Room Thermostat ESRTP6CWF

www.plumbarena.co.uk

Thanks for that. Considered it but £140 for Wi-Fi through ESi compare to £40 for the other thermostat if they work which is why im seeing if it is possible.

 

[Deleted member 267285]

I’m confused slightly, are both thermostats the same on both floors? Looks like you might have opentherm or ebus?

 

[Mister Banks]

I think the extra £100 would be well spent. Your cheap wifi thermostat looks like it is mains voltage switching and your existing thermostat isn't. Get it wrong and you could blow the boiler PCB.

 

[MNW67]

I’m confused slightly, are both thermostats the same on both floors? Looks like you might have opentherm or ebus?

It looks like it's a standard TPI thermostat (ERP Class IV) but part of a kit for new builds with a power supply and DC voltage.

https://support.esicontrols.co.uk/wp-content/uploads/2022/10/ESRTP6C-Installation.pdf

 

[RandomGrinch]

Have a look here...

Replacing ESI ESRTP6C with Nest Thermostat (3rd Gen) - Dual Zone

Hi, I am planning on replacing the two thermostats in my new build house that control the dual zone central heating. The thermostats are ESI ESRTP6C are connected to a wiring system that is connected to the combi boiler and two valves. The thermostats have the following wires connected: +5V...

www.diynot.com

You should be able to connect RH to 0V, and the zone should start heating.

However, you would still need to find a Live and a Neutral to power that new thermostat. A battery powered smart thermostat may be a better idea.