Logic esp1 35/ESi ESRTP5

Aquabloke

I currently have an Ideal Logic combi ESP1 35 connected to two (multi zone) wired ESi ESRTP5 room thermostats.

The 2 thermostats are upstairs/downstairs and seem to be wired first to a honeywell valve each which control the 2 zones.

The thermostats are wire live/neutral and n/o.

Do tado offer a compatible solution?

BenG1980

So I had this issue - New build property. 2 Zone system. ESI controls and wiring centre.

I solved the issue though.

I removed the ESI thermostats and replaced with 2 x Tado Wired thermostats.

I bought a Wago wiring centre from Screwfix for about £20 and wired the whole thing up as an S plan. Fairly simple to do.

The main issue was the motorised valve heads. The versions on my pipe work had pre installed plugs on the end (for direct connection to the ESI wiring centre). I bought two new ones (coincidentally ESI branded but with open wires at the end rather than plugs). Cost about £55 for the 2 (delivered). For anyone who doesn’t want to have to buy new ones - you can just cut the plug off the existing one and strip the wires back. I wanted to retain my full old ESI system though in case I ever move and want to reinstall it. Cutting the plugs off will lose that option.

The only thing holding it all back is the ESI wiring centre which is a ‘plug and play’ setup for ESI thermostats and valve heads.

I’d invested a fortune in my Tado system so was desperate to find a solution. It was a very simple job in the end - albeit with more investment required. Should pay for itself though with Tado savings 😀

johnnyp78

You should in theory be able to replace the thermostats with Tado wired thermostats if they have one heating channel each.

MrRuldolph

Hi Aquabloke

I'm also trying to do the same boiler with 2 zones on Honeywell valves but with a ESi ESRTP6 thermostat instead of the 5. So could be a different reason but I'm finding that the ESI Wiring Centre is not compatible with tado and would need to be replaced or re wired to work with tado.

You may not face the same issue but it may be an ESI compatibility issue https://community.tado.com/en-gb/discussion/12243/last-ditch-attempt-before-i-send-my-tado-wired-thermostat-back-uk

Crash_Evans

Just to close this off and if anyone else had this setup.

Connect the extension kit to the boiler. The two opentherm connections from the extension kit to the opentherm connections in the boiler.

You can use the 240 terminals in the boiler to power the extension kit.

Remove the Room stat switched live (this setup only had one SL to the wiring centre.

You can use wireless thermostats or wired as in the end I just put the Grey wire (0V) in each thermostat to the Black (RH) into a wago connector and park the Brown (+V) into a separate wago connector on it’s own.

No changes to the wiring centre and it means both valves are open and calling for heat and the extension kit is controlling the boiler demand. Tested and it switches on and off correctly. Happy to share pictures if required.

SignoY

Hi Evans,

I would really appreciate it if you could share some photos of the wiring for the extension kit and the wired thermostat.

I want to make sure I understand the setup correctly before I purchase Tado's product and make my Ideal Logic ESP1 boiler smart. Seeing the wiring details would help me feel more confident about the installation process.

I'd be grateful for the additional visual guidance.😊

Crash_Evans

What system do you currently have installed? Which thermostat are you replacing?

It’s quite easy to help you once I know your current setup.

Sam

Sb000003

Hi @Crash_Evans , great that you got this working.
I'm also facing the same problem ideal logic espi1 35 combi boiler with 2 ESRTP6 thermostats that I want to replace.

How does adding the rh(black) wire into a wago keep the valves open and calling for heat?

Thanks in advance

Sb000003

Ahh does connecting 0v(grey) & rh(black) in a wago just keep the original esi circuit open all the time?

In terms of connecting the extension kit to the boiler was there any of the original esi wiring center wiring you had to remove or replace on the actual boiler? Was it just connected to the opentherm connections?

Sb000003

Also not sure if anyone has tried this but the manual for the esi valves notes there is a "MAN OPEN" switch on these motorised valve for draining and filling purposes. I'm wondering if that can be just be set to manual open and forgot about. Then just delegate everything to the tado receiver.

Surely the original esi wiring control center can just be switched out for the tado receiver. Live and neutral and the two opentherm wires.

Sb000003

Scratch the above about the straight swap for the esi control center. It's not using opentherm as its an s plan with the motorised valve.

I think that's what crash_evans meant above about removing the esi switched live in the boiler before wiring in the tado receiver into the opentherm slots in the boiler. I think that switched live comes off the open valve when it opens and calls for heat.

Then I'd still be interested to see if you can just set those motorised valves to MAN OPEN in order to get everything working.

Apologies for spamming this post.