Equation Confort - Identify which cables to use with my thermostat.

You need some help attaching the thermostat to your specific boiler. This way please !
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utar
Posts: 3
Joined: 14 Oct 2020, 14:30

Equation Confort - Identify which cables to use with my thermostat.

Post by utar »

Hi, I've recently moved and I want to install my netatmo into the new house. I have no access to the boiler, only to the thermostat.

My current thermostat is an Equation Confort but I do not understand my current thermostat installation.
The attached image "current-equation-conforts" shows three cables attached to the thermostate.
current-equation-confort.jpg
current-equation-confort.jpg (694.88 KiB) Viewed 924 times
However the instructions (equation-confort-instructions) says:
- contacts 1, 2 for N.O valves
- contacts 1, 3 for N.C valves
equation-confort-instructions.png
equation-confort-instructions.png (395.99 KiB) Viewed 924 times

I do not know what cables should I connect my netatmo thermostat or even my boiler is compatible with netatmo


Can somebody help me?

thank you
Last edited by GEORGzer on 14 Oct 2020, 14:58, edited 1 time in total.
Reason: title adapted for better searchability
GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

Re: Equation Confort - Identify which cables to use with my thermostat.

Post by GEORGzer »

N.C. and N.O. stand for "normally closed" and "normally open".

Meaning when not heating, this thermostat in its "normale" state closes the contact between terminal 1 (L) and terminal 2 (N. C.).
When active (heating), that switches and the contact between terminal 1 (L) and terminal 3 (N. O.) gets closed.

So if you wire the cables from terminals 1 and 3 to the Netatmo Thermostat, you'll achieve the same state when heating comes on as your old thermostat did.
However, the Netatmo Thermostat can't provide a separate "N. C." contact and that may be a requirement for your heating system to work properly, hard to tell without more informations.

A possible workaround would be to get a 2-way relay and wire that one in between the Netatmo Thermostat and the onsite system. That would create the same circumstances as you have right now.


But please make sure that no wires are active before doing any work. This can be dangerous with a not accessible boiler.
Home: Weather Station (V3 + Rain & Wind Gauge, 3 additional Indoor Modules, Shield), Valves Starter Pack + 7 Valves, Video Doorbell
Office: Thermostat (V2), Healthy Home Coach, Smoke Alarm, 2 2in1 Sensors

Not a Netatmo employee
utar
Posts: 3
Joined: 14 Oct 2020, 14:30

Re: Equation Confort - Identify which cables to use with my thermostat.

Post by utar »

Thank you so much for the explanation, now I am able to understand it.

I've asked to my energy provider if they can facilitate me more information.

Thank you again
GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

Re: Equation Confort - Identify which cables to use with my thermostat.

Post by GEORGzer »

;)
Home: Weather Station (V3 + Rain & Wind Gauge, 3 additional Indoor Modules, Shield), Valves Starter Pack + 7 Valves, Video Doorbell
Office: Thermostat (V2), Healthy Home Coach, Smoke Alarm, 2 2in1 Sensors

Not a Netatmo employee
utar
Posts: 3
Joined: 14 Oct 2020, 14:30

Re: Equation Confort - Identify which cables to use with my thermostat.

Post by utar »

well, after asking to my company and they confirmed only two cables are necessary I have installed my netatmo.
But, once the boiler is on, it is never turn off. Even if a detacht the thermostat from the cables. I need to attach the older one in order to turn off the radiators.
So I think I need to use the three cables and my netatmo is not compatible :(
GEORGzer
Posts: 2663
Joined: 14 Jan 2014, 18:14

Re: Equation Confort - Identify which cables to use with my thermostat.

Post by GEORGzer »

As I feared, your boiler needs a dedicated „turn-off“ signal.

But as I mentioned, you could wire a relay between and solve this problem.
You would need a so called „change-over“ relay, that can switch between 2 contacts like this one:
https://www.conrad.com/p/eltako-er61-uc ... cs-2162230
Home: Weather Station (V3 + Rain & Wind Gauge, 3 additional Indoor Modules, Shield), Valves Starter Pack + 7 Valves, Video Doorbell
Office: Thermostat (V2), Healthy Home Coach, Smoke Alarm, 2 2in1 Sensors

Not a Netatmo employee
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