Which bimetallic thermostat should I use for a 25kW eco-coal stove with IRYD RTZ?

Hello,

I have a 25 kW eco-coal stove with an IRYD RTZ PID fuzzy logic controller. I’d like to buy a thermostat for it (normally open), preferably with a bimetal control mechanism, without the need for a separate power supply. In other words, the contacts are open before the set temperature is reached, and once the temperature is reached, the contacts close and the stove (controller) switches to the maintenance mode. I found something like this on Allegro: ‘Bimetal Room Temperature Controller, Room Thermostat, model: MT-2’. The problem is that it seems to work the other way round, i.e. the contacts are normally closed. Can you recommend anything?

Here you go Link

Exactly, but first of all, you need to connect a separate power supply to it, which I’d like to avoid, and the sensor has to be clipped onto a pipe. What I’m after is a room thermostat that measures the air temperature.

It doesn’t need a power supply, but if you want a room-temperature one, get one like this . It has 3 terminals: NC, NO and COM; you’ll need the NO and COM terminals.

The manual says I need COM and NC.

galusxx wrote:

So the contacts are open before the set temperature is reached

Sorry, but you wrote that yourself.

Yes, that’s right, and I can see there’s a mistake in the instructions . Take a look at the first image

Well, there you go – the contacts must be NO.

OK, I’ve bought an Auraton 1300; I’ll let you know how it performs once I’ve installed it.

Room thermostats refer to contacts that are either open or closed when the set temperature in the room is reached.
If COM and NC are marked, you need to connect to the terminals that will be closed when the temperature is reached.
So the instructions are correct.

You’re wrong.

AdamMat is right – you just need to read the description carefully (the two sentences preceding the first diagram) – it’s very simple and to the point.

You’re right.

Right, we’ve finally reached a consensus

Perhaps a bit off-topic

There’s a bit of a mess in the village

And here’s the mess my installer has left me with:

And then there’s the stove from Profil:


I paid a bit extra and bought an Auraton 2005; I splashed out on the day and night programmes. Everything’s working well.