Hello,
the first four months of "living" in our new home are over. We are very happy to have chosen a ventilation system (Zehnder 450). Our house has a living area of 240 m² (2,583 sq ft) and is heated with gas (Buderus Logamax plus), and there is a solar thermal system for hot water. Additionally, we have a tiled stove in the living room.
I turned on the heating exactly four weeks ago and have been tracking the gas consumption. During this time, 125 m³ (4,413 cu ft) of gas was used. October was rather warm. The rooms tend to be too warm (23°C / 73°F), even though the thermostats for the underfloor heating are all set to the lowest setting (level 1).
The desire to make it "cozy" with the tiled stove just doesn’t arise.
What could be going wrong here?
Best regards,
Barossi
the first four months of "living" in our new home are over. We are very happy to have chosen a ventilation system (Zehnder 450). Our house has a living area of 240 m² (2,583 sq ft) and is heated with gas (Buderus Logamax plus), and there is a solar thermal system for hot water. Additionally, we have a tiled stove in the living room.
I turned on the heating exactly four weeks ago and have been tracking the gas consumption. During this time, 125 m³ (4,413 cu ft) of gas was used. October was rather warm. The rooms tend to be too warm (23°C / 73°F), even though the thermostats for the underfloor heating are all set to the lowest setting (level 1).
The desire to make it "cozy" with the tiled stove just doesn’t arise.
What could be going wrong here?
Best regards,
Barossi
K
Knallkörper31 Oct 2017 14:29Joedreck schrieb:
Can you see the flow at the manifold after all...?Yes, the original poster should check that. The flow rate must drop to zero when the room thermostat is turned off, or at least to a minimum when the room temperature is around 22 or 23°C (72°F to 73°F) (you can hear a quiet click when turning the dial indicating the control threshold is passed).
If this does not happen, there is likely an electrical issue, and the supply temperature is irrelevant at this point. The heating system cannot be properly adjusted if not all heating circuits can be operated correctly. So it is essential to open the manifold and test each room thermostat actuator one by one.
Hello everyone,
Great, I think that’s it.
All (13!!!!) electronic controllers were set to "open."
I switched them all to automatic mode and set 1-2 thermostats to maximum; I heard the clicking and then saw (with a delay) the flow.
Here are photos of the two control units, now all without flow; red ring "top":
I will proceed as Joe described. After adjusting the design temperature from 47°C (117°F) to 35°C (95°F), I’ll wait for a cool, shady day (0°C (32°F)) and observe how the temperature stabilizes with the controllers fully open (wait time, control cycle 24 hours), then possibly increase the design temperature moderately.
Is that okay?
Next step will be fine-tuning the domestic hot water.
Thanks everyone!
Best regards,
Barossi
Great, I think that’s it.
All (13!!!!) electronic controllers were set to "open."
I switched them all to automatic mode and set 1-2 thermostats to maximum; I heard the clicking and then saw (with a delay) the flow.
Here are photos of the two control units, now all without flow; red ring "top":
I will proceed as Joe described. After adjusting the design temperature from 47°C (117°F) to 35°C (95°F), I’ll wait for a cool, shady day (0°C (32°F)) and observe how the temperature stabilizes with the controllers fully open (wait time, control cycle 24 hours), then possibly increase the design temperature moderately.
Is that okay?
Next step will be fine-tuning the domestic hot water.
Thanks everyone!
Best regards,
Barossi
I think I have the same problem. Some of the room thermostats are set to 0, others to 15, others to 21, but it doesn’t matter—it's 21 everywhere. Too warm for sleeping, unnecessary in the guest toilet. But I won’t adjust or open anything; the heating engineer should come and check it. That’s what they’re there for. Karsten
Nice to hear about a result.
What design temperature do you have set, and which major city is nearby?
By the way, it might stay too cold now, possibly. In that case, you could try setting the offset menu option to +1.
There are many good and detailed guides available online.
Fine-tuning is up to the user. The main goal of the heating system is “at least warm.”
And don’t get frustrated too quickly. It can easily take the entire winter to dial it in perfectly.
But then, at maximum efficiency, you get the best comfort atmosphere at home.
What design temperature do you have set, and which major city is nearby?
By the way, it might stay too cold now, possibly. In that case, you could try setting the offset menu option to +1.
There are many good and detailed guides available online.
Fine-tuning is up to the user. The main goal of the heating system is “at least warm.”
And don’t get frustrated too quickly. It can easily take the entire winter to dial it in perfectly.
But then, at maximum efficiency, you get the best comfort atmosphere at home.
Joedreck schrieb:
Nice to hear some results.
What design temperature do you have set, and which major city is nearby?
By the way, it might stay too cold now, so you could try setting the offset menu option to +1.
There are many good and detailed guides available online.
Fine-tuning is up to the user. The heating system’s goal is “warm enough.”
And don’t get frustrated too quickly. It can easily take the whole winter to get it exactly right.
Then, with maximum efficiency, you’ll have the best comfort at home.
Hello Joe,
I have now set the design temperature to 35°C (95°F). Previously, it was set to 47°C (117°F). I live in the suburbs near Hamburg.
All thermostats are currently set to 1 (closed), and I’m letting the temperature drop. Then I will set all the radiator thermostatic valves (RTR) to 3 and observe the room temperatures. I’m keeping the heating curve as it is for now.
Best regards, Barossi