Pellematic Condes 25 kW: setting?

[tulul63]

Hello,
I have just moved into an old 250m² house which has an OKOFEN pellematic condens 25KW with outside sensor and an ambient thermostat (no DHW), my problem is as follows:
when the temperatures become negative my boiler struggles to regulate the comfort temperature set at 19 and I have the impression that it keeps switching off and on again all the time.
Here is the data I was able to find:
foot of curve = 37
slope = 1.4
comfort ext t limit = 19
limit t ext reduced =12
anticipation = 120 min
stop hysteresis = 0.8
hysteresis on =0.5
t max start =65
t start min = 35
van mel opening = 5s
van mel pause =5s
van mel closing: 3s
tc setting range = 10
adjustment range td= 10
evolution t boiler etc increase = 5
evolution t boiler etc adjustment range =5
I was also able to pull out a curve
Thank you for your feedback

[Pilpoill]

Hello,

To start, I propose to start again on reliable bases adapted to condensing models in the majority of cases.

180 anticipation
Stop and start hysteresis on 1K
V3V open 5 pause 15 close 5
Evol T Hot ETC increase 0
Evol T Hot ETC setting range 0

The curve in image format would be clearer ;)

[tulul63]

Hello,

To start, I propose to start again on reliable bases adapted to condensing models in the majority of cases.

180 anticipation
Stop and start hysteresis on 1K
V3V open 5 pause 15 close 5
Evol T Hot ETC increase 0
Evol T Hot ETC setting range 0

The curve in image format would be clearer ;)

Thank you for your answer, I have just put the settings mentioned above and I will see how the boiler behaves with these new data
Regarding the curve here is an image which I think will be much more readable.

[Pilpoill]

The flow temperature is never stable, the circulator cuts out several times during the day, no doubt due to an ill-adapted heating curve and too low cut-off hysteresis.

The two EH measurements are not useful for this problem, however the boiler temperature should be added to the graph (PE1 TC mes)

[tulul63]

The flow temperature is never stable, the circulator cuts out several times during the day, no doubt due to an ill-adapted heating curve and too low cut-off hysteresis.

The two EH measurements are not useful for this problem, however the boiler temperature should be added to the graph (PE1 TC mes)

Here is the beginning of this day's curve with the boiler temperature

[Pilpoill]

The boiler temperature which varies in sawtooth over an amplitude of 25°
There is something wrong...

Unsuitable power?
Incorrectly adjusted circulator?
…?

If I can have access to the time to check that all the parameters are correct, that would greatly facilitate the understanding of what is happening.

[tulul63]

The boiler temperature which varies in sawtooth over an amplitude of 25°
There is something wrong...

Unsuitable power?
Incorrectly adjusted circulator?
…?

If I can have access to the time to check that all the parameters are correct, that would greatly facilitate the understanding of what is happening.

I know that my boiler is connected because the technician who serviced me installed the app on my smartphone, but I don't know how to give you access? if you give me the instructions to do it no problem for me

[tulul63]

The boiler temperature which varies in sawtooth over an amplitude of 25°
There is something wrong...

Unsuitable power?
Incorrectly adjusted circulator?
…?

If I can have access to the time to check that all the parameters are correct, that would greatly facilitate the understanding of what is happening.

I know that my boiler is connected because the technician who serviced me installed the app on my smartphone, but I don't know how to give you access? if you give me the instructions to do it no problem for me

if you tell me what parameters you want, I can give them to you by taking screenshots

[tulul63]

The boiler temperature which varies in sawtooth over an amplitude of 25°
There is something wrong...

Unsuitable power?
Incorrectly adjusted circulator?
…?

If I can have access to the time to check that all the parameters are correct, that would greatly facilitate the understanding of what is happening.

Here is the last curve with the parameters entered last night
and the pellematic adjustment table

[Pilpoill]

Good evening, the water law is too strong, it still triggers despite the cut-off hysteresis at 1K and there are probably many other things to study.

A photo of the circulator (in operation if it is led) to see how it is configured.
Is the flow temperature sensor firmly attached to the flow pipe? (Normally positioned above the circulator)
How many radiators and their type for this surface?
Are they all open to the maximum if they are fitted with a thermostatic valve?