Need help for boiler De Dietrich MCR 24/28 MI

[tokata]

Hello,
I am from Bulgaria.
I have a boiler De Dietrich MCR 24/28 MI.
Currently the boiler is controlled by a thermostat on/off.
I want to replace it with a modulating internal temperature with OpenTherm standart.
In Bulgaria only available model "DeDietrich-easymatic", which costs over 300 euro.
So I want to buy from online shop.
I wonder between two models: Remeha iSense and Honeywell CMT957.
Whether you are compatible with my boiler and which one is better?
Who will control the boiler more precise? I can only modulate the internal temperature will not have an external sensor.

Thanks a lot!

 

[Boilerman2]

Any "Open Therm" Control will do what you want, however Remeha are owned by De-Dietrich, so the I-sense may be the way to go?

 

[tokata]

Hello,
First I want to thank you for your reply to my inquiry.
I have several questions and will be happy to reply.
The manual for my boiler De Dietrich MCR 24/28 MI, nowhere mentions that there OpenTherm standard, no logo, but the circuit diagram of the terminal 7 and 8 have written Compensator / OpenTherm. So I guess my boiler has this standard. Can you tell me if my boiler really is this standard? If my boiler has OpenTherm standard thermostat which would you recommend: Remeha Celcia 20 or iSeanse?

 

[D_Hailsham]

Remeha are owned by De-Dietrich

It's the other way round.

Remeha acquired De Dietrich in 2004, forming the De Dietrich Remeha Group. They then acquired the Baxi Group in 2009 to form BDR Thermea.