Buderus GB 072 + RC 300: Optimizing Floor Heating Settings in 24 cm Cellular Concrete Building

Hello, I launched CO two weeks ago in a building completed in June. Until mid-November it was heated with a traditional fireplace. The building is made of H + H 24 cm cellular concrete, plus 18 cm foam. The ground floor has an area of 67 meters and the floor is 50 square meters. Buderus GB 072 20 kW furnace, hot water tank Galmet 115 liters, Buderus pump set. I have two separate heating circuits, each on the first floor, where the RC 300 is on the ground floor and RC 200 on the first floor + outdoor temperature sensor. I have a separate circuit in the distributors for each room. There is underfloor heating everywhere.

After baking the screed in April, I now selected all the settings myself:
OG 1
19.5 day, 18.5 night
Design temperature 48
Maximum flow temperature 45
4K room influence
Room temperature correction -1k (overheating, that's why I set -1k)

OG 2
20.5 day, 19.5 night (higher temperatures because the controller is located in the staircase, where the heat from the ground floor affects it and thus indicates a temperature 1 degree higher than in the rooms)
Design temperature 48
Maximum flow temperature 45
4K room influence
Room temperature correction 0k

Min outdoor temp -20
Suppression NO
Medium building type
Optimization of switching the time program off
Summer mode from 13 degrees

At outdoor temperatures -1, + 3 over the last two weeks, daily burner starts are about 40-50 times, and the burner has a working time of 7-8 hours. My first request is not the burner work time too big? My second request, the stove still overheats by an average of 0.7-1.0 degrees - how to deal with it?

The most important for me is comfort and then burning, especially since the pregnant wife is at home during the day. I have an external gas tank.

daniel_poznan wrote:

My second request, the stove still overheats by an average of 0.7-1.0 degrees - how to deal with it?

On which circuit?

daniel_poznan wrote:

Suppression NO

I think it would be optimal to include.

daniel_poznan wrote:

the furnace still overheats by an average of 0.7-1.0 degrees - how to deal with it?

High design temperature. I think 35 * is enough, and it can still be too high.

daniel_poznan wrote:

daily burner starts are about 40-50 times

Too much boiler power to the surface.

When it overheats, check the service menu diagnostics for the measured values on the heating circuit which correction the influence of room temperature the boiler has taken.

piracik wrote:

daniel_poznan wrote:

My second request, the stove still overheats by an average of 0.7-1.0 degrees - how to deal with it?

On which circuit?

OG1 0.5-0.7 and OG2 0.7-1.0

daniel_poznan wrote:

Suppression NO

I think it would be optimal to include.

After switching on, I understand that the stove will not react so often to changes in the outside temperature?

daniel_poznan wrote:

the furnace still overheats by an average of 0.7-1.0 degrees - how to deal with it?

High design temperature. I think 35 * is enough, and it can still be too high.
Then the stove will not be turned on all the time? I mean here a reduction of the boiler operating temperature in relation to the outside temperature?

daniel_poznan wrote:

daily burner starts are about 40-50 times

Too much boiler power to the surface.
In the sense, these 20 Kw is too much for this surface? Can you somewhere in the oven settings limit the power? He also heats on hot water.

When it overheats, check the service menu diagnostics for the measured values on the heating circuit which correction the influence of room temperature the boiler has taken.

In the service menu under "Diagnosis", the room influence has a value of -4K in the monitored values OG1. OG1 was overheated by 1.1.

I forgot to ask why for the set night temperature instead of showing this temperature, the info shows that the heating is off?
Tonight I will change the setting according to the above and in a few days I will report.

-4k means that the design temperature setpoint is too high.

Heating on at night - change the setback mode to room temperature

Thank you for the advice. Now the oven overheats / does not heat by 0.3, so from what I read it is approx.
I am tired of the topic of burner starts - it gave on average about 40 and work time about 7 hours. Wouldn't it be more economical if the stove turned on less often?

enable optimization, the controller will work as if the weather is on, it will turn on earlier (in my case, even 3 hours in cold weather) and will work with a lower supply temperature. and write down the gas meter after a week, you will evaluate two

Marek39 do you mean optimizing the activation of the time program?

I have no idea what is the optimization of the time program or thermal sensibility 4 seasons I fought with it and nowhere has a description what it is (neither the service technician nor the internet doctor could explain), in short my rc35 starts heating so that when switching to the day program the temperature is as achieved or I had to rearrange the hours of night-day and so Mon-Fri the day starts at my place at 15.30 (at 15.00 my wife returns from work) in cold weather the heating starts from noon, from 20.00 I have night (because I go to sleep theoretically) only sat-sun day I have from 8.00-12 and 18.00-20.00. The weather (according to the outside temperature) heats practically all day and I don't need to heat up the attic bedroom during the day but only at night. And so at current temperatures and winds in the morning, night-time heating of the flow temperature starts. 28-33 medium (i.e. high efficiency of the furnace). In the middle of January last year at the weather (I was persuaded to the test) I found that gas consumption exceeded the average year-to-year by 160 m, which gives me a frosty additional month. I wrote, I hope I understand comprehensively - I will add a house 160 sq m total glued garage and attic settings 21 / 22.5stC temp and 46 degrees. Annual fees with water heating 1800-1950 PLN for 7 months of the season which gives 2/3 of what I pay for a year in the city for 40 sq m in the block

From what I conclude from the description, this option in the RC 300 is called optimization of the time program activation and it is started with one button and in the automatic operation it is quite expensive.

in RC35 this option is in the service menu settings heating circuit as a question about activating the optimization of switching (probably because you have to play day-night hours) as to the fees, I gave them and rather they are Oki all friends are surprised and maybe someone will enter here in addition pays for gas when heating GB072 - swag's brother 4 thousand