[Solved] Thelia Condens: constant temperature, weather curve, settings?

Hello.
I have a Saunier Duval Thelia Condens AS 25 - A (H-PL) boiler with an Exacontrol E7 V. 2.11 controller and an outside temperature sensor.
I would like to disable regulation based on outdoor temperature, indoor temperature and weather curve.
I would like the boiler to maintain a constant temperature of water feeding the radiators, e.g. 40 degrees. How to set it up?
Thanks in advance.

After disconnecting the external sensor and the regulator, you set the required temperature on the boiler. With a connected weather sensor and controller, you cannot. Only turn off the weather and leave the thermostat function (in the controller in service settings).
What kind of installation do you have that, having the above, you do not want to use this benefit?

Hello. Thank you for your interest.
I have had a boiler for a few days, it only produces heat for central heating.
I have not read in the manual how it is with a constant temperature, so I am asking out of curiosity.
The house is 250 meters high, insulated walls, ceilings, roof ... The consumption of coal for heating was 5 tons per season. Mostly oversized cast iron radiators with thermostatic heads.
Ultimately, I want to control only the weather curve, with the inside temperature sensor turned off, because each floor has different thermal conditions.
Is it possible to do so that, for example, at -30 * C outside, have 40 * C on the radiators and at 0 * C outside 30 * C on the radiators?

Cast iron radiators and thermostats are the perfect solution for this boiler. a lot of water in the system guarantees better heat recovery from the flue gas
in the boiler service settings:
parameter d43 - the slope of the heating curve - you can freely set it
parameter d45 - Value of the lower point of the heating curve - you change it if, after setting the curve, the room temperature is not intended
In the controller, in the service settings, you switch off the thermostat function (influence of internal temperature), the device works according to the set heating curve.
the graphs of the curve predict the range -20 to + 20 * C and the curve is selected for these values. In your case, I suggest 0.3

Did you commission this boiler by the service - flue gas analysis? These settings belong to the service technician and he should set it up for you. It is free to run.

Thank you very much. The service technician was there, he measured, he adjusted the curve, but he didn't tell me anything about the curve adjustment, I didn't ask, so now I'm exploring the topic.

I will check what I have set and I will probably ask again ;-)

A service technician threatened me with sludge from cast iron radiators ... Is it really a problem? I rinsed the installation after disassembling the old boiler: once with water, then with detergent, and four times with water. A lot of black iron oxide was flowing, but I did not notice some "glutes" and sediment.

if not a service technician, at least the installer should train and pre-arrange it, for that they take money, and it is not a lot of trouble.
The analysis has a bit too little CO2, the manual says 9.2 + - 0.2% with the front panel removed and 9.2 + - 0.3% with the front panel on. It is important that the CO is not exceeded.
Thelia exchangers are one of the best, over 10 years, proven. Large cross-sections inside and resistant to fouling.
As for the sludge from the radiators - when you started the installations, you know what you have. When you rinsed it is ok, it is best to add some agent, turn on the pump on the old installation for a month and then change the boiler.
You shouldn't have any problems. It is important that there is a magnetic filter in front of the wheel, because there is an electronic pump.

Welcome back.
I would like to ask about the parameters:
d.43 Heating curve
d.45 Value of the lower point of the heating curve
What are they actually doing? I imagine the curve as some function, something from the outside temperature. But what? Supply temperatures? On the way back? What is d.43 doing with this graph of the function and what is this point d.45?

the heating curve reflects the heat demand of your building. Perfectly matched, the boiler provides as much energy to the room as is needed to maintain the desired internal design temperature at a given moment. The more efficient the condensate is, the more heat it receives from the flue gas, therefore the curve is used and not, for example, 70 * C. It is always good to set it up with little margin for comfort or lowered for less gas consumption.
d.43 - range 0.1-4. You choose the slope of the curve for your building. As you can see in the diagram, the heating (supply to radiators) temperature is a function of the outside temperature.
When the (ebus) exacontrol e7 controller is connected, the possibility of adjusting the curve disappears (I do not remember if you turn off the thermostat or not - you have to check)
d.45 - changes the starting point of the curve (x and y axis intersection). i.e. if it is ok at low temperatures, then with positive temperatures the curve may differ a bit, therefore you move the beginning of the curve with this parameter.
Tehelia generally has a lot of room to set up

Hello,
You do not need any regulator to work with the boiler ONLY with weather control. The system is in the boiler, you only need to connect a WIRED external sensor (or make it yourself for a few zlotys, i.e. housing + appropriate thermistor + 2 resistors matching the characteristics of the system to the characteristics of the original sensor). By seeing the charts of heating curves, you can in d43 and 45 make sure that it is not too hot in the transitional period, and too hot or too cold in severe frosts. And sell Exacontrol on OLX In general, the room regulator and weather automation are not interchangeable, but only complement each other. The continuous regulation causes the boiler to be smoothly modulated so that the set temperature in the room is achieved asymptotically and it tries to maintain this in a continuous manner. The problem arises when we do not have a representative room in the facility (school, hospital, etc.), which is also the case with you, where only the weather itself works, without being related to the actual temperature in the rooms.

Thanks for the good idea.
Should I switch off "automatic heat curve management"?

You should completely disconnect the room regulator because it, and more precisely the room temperature with the regulator, will modulate the boiler's operation only for the needs of this one room and it will probably not be representative for other rooms.
Greetings

Szczecin62 wrote:

You should completely disconnect the room regulator because it, and more precisely the room temperature with the regulator, will modulate the boiler's operation only for the needs of this one room and it will probably not be representative for other rooms.
Greetings

There is an option to disable the influence of internal temperature in the controller. I will not disassemble exacontrola until I have a warranty for the whole thing. So two more years without two weeks.

My friend,
EXACONTROL is a ROOM ONLY controller, so it would be pointless to deactivate the temperature sensor in it and there is no such possibility! POORBAR is built into the boiler and cooperates with the regulator or can work without it.
Either you get lost or you got it mixed up with Vaillant's weather controls. There, weather regulators (Vaillant boilers do not have a factory-built weather forecast and it is applied in the regulator) were only switched to the weather by default and had to be activated in the program to also be a room thermostat.
Greetings

Szczecin62 wrote:

My friend,
EXACONTROL is a ROOM ONLY controller, so it would be pointless to deactivate the temperature sensor in it and there is no such possibility! POORBAR is built into the boiler and cooperates with the regulator or can work without it.
Either you get lost or you got it mixed up with Vaillant's weather controls. There, weather regulators (Vaillant boilers do not have a factory-built weather forecast and it is applied in the regulator) were only switched to the weather by default and had to be activated in the program to also be a room thermostat.
Greetings

Yes, I WAS MISTAKED, Only that you have not written what the regulator is about. I associated it with type B (and 99% of it does not have such an option). You show type C and in fact there is such an option on it (if I am not mistaken then only when we connect the external sensor to the boiler and it is practically unnecessary with such a regulator, because the regulator itself can greatly optimize the operation of the boiler only as a function of the internal temperature, and more precisely as it grows quickly and how quickly it descends) and I never paid attention to it because it seems to me that it is difficult to justify the option to turn off the room regulator when the weather system itself is in the boiler! Why this regulator then?
Greetings

I repeat the question:
Should I turn off "automatic heat curve management" if I want to set myself to 20 and 0.3?

Exa won't let you change the curve without turning off the automatics.

Sell Exa on OLX set the curve and offset on the boiler you have solved the problem.
Remember that the curve and its offset should be set with an understanding of how both parameters influence each other and what they give together. You will not set them theoretically, but experience and intelligent observation after at least one season will give you a hint on how to set. After the second season, everything should be ok and you forget about the weather (make sure that no vermin get into the external sensor housing because their products can change the resistance. It is less of a problem for new boilers, because they have a thermistor of about 1 k (20 * C) and it is difficult to change such a resistance, but in older boilers the thermistor was 12.5 ka, for such a resistance, already wet cobwebs, etc., garbage was already flowing in.
I'm silent on the subject
Greetings
for everyone

Szczecin62 wrote:

You should completely disconnect the room regulator because it, and more precisely the room temperature with the regulator, will modulate the boiler's operation only for the needs of this one room and it will probably not be representative for other rooms.
Greetings

You were right. Indeed, exa blocks the possibility of changing the d45 parameter. I unplugged it, set it up and it's fine.
Thank you.

Szczecin62 wrote:

You should completely disconnect the room regulator because it, and more precisely the room temperature with the regulator, will modulate the boiler's operation only for the needs of this one room and it will probably not be representative for other rooms.
Greetings

You were right. Indeed, exa blocks the possibility of changing the d45 parameter. I unplugged it, set it up and it's fine.
Thank you.

Added after 3 [minutes]:

1. Disconnecting the room regulator.
2. Parameters:
d43 - 0.3
d45 - 21