Let me explain my situation:
I bought a property in the South 77 in August 20. Longère type of 240 square meters, exposed stone and therefore not at the top insulation. The existing heating was centered on a system of PAC + Gas in tank with water radiator system. (15 radiators in the house)
First winter: I turn on the heat pump in October (Which had to manage the heating up to 5 degrees outside), and I realize after a month of use that my electricity bill has made a gigantic leap. (600€ for this month alone....). So I switch to the gas boiler, knowing that it will also cost me an arm. We avoid overheating, and stay at an average temperature of 19.
I make an assessment at the end of winter: 3000€ of gas. In short, it is time to move towards another heating system. After much research, I decided to switch to pellets, via Okofen boiler.
The Ardente company, which manages sales in my Region, therefore sends me a local installer who, after studying the house, offers me a Pellematic PES25 boiler + 7-tonne geotextile. According to her, I should consume around 8 tonnes per year.
The installation is done in August 21, so first winter with the Okofen.
As I write to you, it is 16 in the living room...usual temperature when, outside, we are below 5 degrees. Almost all the time right now.
At the bottom of the house, all the radiators are on max, at the top we only heat the children's rooms. In the end, we will say that we heat about 180 square meters.
On December 03, the outside temperatures drop and that's when I realize that the heating does not follow inside and that the temperatures are yoyo (Between 16 and 20 at best). I therefore contact my installer to understand what to do in order to stabilize at a permanent 20 degrees. He answers me more than 2 weeks later:
"For the operation of your boiler, indeed, the boiler "produces" hot water according to the outside temperature that the sensor constantly measures, also according to the temperature you request (comfort and reduced) and finally values "supposed" to be representative of your level of insulation, these are the foot of the curve and the heating curve.
To these settings, you must add the inertia of your house, which remains impossible to estimate and which is discovered by heating also depending on the outside temperature....
The inertia will correspond to the potential of your house to retain heat or not.
Example, it is 20° at 22:00 p.m. and you have programmed 18° for the night from 22:00 p.m.
It will not be 18° at 22:01 p.m. but it can take 1 hour, 2 hours or more to come down. And it all depends on how cold it is outside...
This is why for a radiator network, we put 120mm of anticipation as the basic setting.
In basic settings, with a house like yours, the foot curve is 35 and the heating curve 1.5
Then, do not make the big difference between 26° in comfort and 18° in reduced. It is necessary to avoid exceeding 3 to 4° maximum.
If you want 20° continuously, don't make lowerings, especially this big!!
Put the boiler on comfort instead of the auto position
This will already avoid yo-yoing with the temperatures.
Then, when you go to the "heating" icon, go down with the right arrow until you find "heating curve"
There you can check the foot of the curve and the heating curve (35 and 1.5).
In the "comfort limit" setting, put a value in line with the comfort temperature you have chosen.
For example 20° in comfort >> 18° in comfort limit (2° below)
Then, with each adjustment, your house takes some time to react, so you should not "if possible" change several parameters at once and change them again the next day.
After 24 hours if you do not have the 20° you are looking for, but below, you will modify the foot and the curve:
From 35 at the foot of the curve, go to 36
From 1.5 in heating curve, go to 1.6
And leave to see the result.
Note the evolutions of settings in order to have a history.
Given what you write, I think the base setting 35 and 1.5 does not allow enough hot water to be sent to the network.
This results in a ceiling of your comfort temperature, and at night when you ask for 18°, at some point the temperature necessarily drops and in the morning, the boiler pedals to raise the temperature...
Try all this, in 24 hours, change "possibly" the foot and the curve, when already, it will be settled, the programming with a lowering will be topical."
3 or 4 exchanges have followed since (we are on 17/01 and the last one dates from 21/12!), asking me to "play" with the feet of curves, slopes... in order to obtain the expected result . As you will have understood, I have never succeeded, especially since I regularly notice that the hot water flow temperature is never stable and oscillates regularly. (Currently flow temperature, set point 58 and measured 54 ; quite stable by the way since I went back to automatic mode 2 days ago)
Having had very few respondents, you can imagine that I escalated my concern to Ardante who, themselves, send me back to the installer. By dint of getting upset, I have the project manager send me 2 emails on 13/01 asking me a few questions:
"I have just looked at your boiler. Indeed the flow temperature does not reach the setpoint.
Is the 3-way valve correctly put in automatic mode and not in manual mode.
Do you have enough pressure in your networks (1.5bar).
Have you purged your radiators (we have already encountered this problem with Mr. Morin during start-up, the heating water was blocked). A simple bubble can block circulation. "
==>I answer him that I have already done many purges, and cannot understand the relationship with the fact that the starting temperature is never optimal and fluctuates regularly during the day. (This morning of 13/01; 35 on waking, 49 at the time of my email for 67 requested)
The pressure is OK(1,5).
I ask him to call me urgently, and hasn't heard back since January 13, explaining to me that his schedule is tight...the guy isn't able to contact me.
In //, the height of despair, I go to check the silo by acquired conscience... and realize that it is almost empty. Indeed, he will let me go the next day, 14/01/22.
==> How is it possible to have consumed more than 6 tons in 5 months, including 2,5 months when the boiler only heated the balloon?????
I was told +/- 8 tons / year, the house only heats to 16 degrees (bottom), and I hardly heat the top.
There really is a problem in general.
Again, if it was really hot, I would be able to understand a little more pellet consumption, but there, I was told to be quiet almost the year with my 7 tons, and I realize in the middle of winter that I have nothing.
You can imagine the complexity of having it delivered urgently, so I had fun this weekend picking up 1,5 tons of bagged pellets...very expensive...and very practical to handle and fill the geotextile with. ....
I don't know what your feedback is with installers/dealers and your equipment, but personally, I am extremely disappointed and not far from angry at the moment.
Do you know what recourse I have and who I can contact since Ardente and the heating engineer do nothing for me?
Thanks for reading and helping,
