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I just realized that the boiler is not wired to anything. It's set to 60C. If the temperature drops to 54C, it starts. If it reaches 66 it stops and restarts if 10 mins have passed and temp is lower than 54. The thermostats just control the actuators and the pump and don't trigger the boiler...

Just noticed a different problem. All thermostats reached the designated temperature. All actuators closed and circulation pumps closed as well. No demand from the boiler. Boiler starts till it reaches 66 degrees and shut down. Restarts after 10 minutes. Pipes are hot, main flow and return pipe...

After I increased the boiler water temp to 60C everything worked as intended. Took a while to draw that conclusion, as UFH doesn't heat up the room as fast as radiators. However, now I have 22-23C ambient upstairs. I was asking about the flow rates as an optimization. Maybe making the system...

What am I aiming for? To have a 6 degree delta between flow and return? Is this achievable only by fiddling with TMV or the flowmeters and pump needs some adjustment as well?

Upstairs the bypass valve is 20% open. Downstairs it's 45% open. Roughly

The pump is 37W nominal power, 800-4250 rpm, 3.3 m3/h max volume flow Upstairs only one circuit demanding heat, 42C in and 38 out and downstairs everything was closed. So I turned up all thermostats and waited like 10 mins. Here's the data: Downstairs: 35C in and 32C Out Flowmeters: 3 , 3 , 4...

The temperature sensor for the TMV is not inserted in the flow manifold, it's actually soldered to it by design. I attached I picture from the manual. I'm not conformable in removing the TMV temperature dial because it brushes against the wall and there is no room. I doubt that the pin is...

The mixing unit has a bypass valve. As I played with it, it has 15 turns to fully open. Right now is at 3 turns open. Should I close it completely?

The TMV is set to 45 and I measured again and it's 35C flow and 33C return

Flowmeters starting from the copper flow pipe: 4.5 , 5 , 4 , 4.5 , 2.5 , Closed , Closed , 2 , 3 L/min The temperatures and flow ratings are for upstairs. Downstairs I didn't measured as almost all the actuators are closed. However, the copper pipe is noticeably hotter than upstairs

It's funny the black tape made like a 2 degree difference when reading. So, the flow pipe is 32.2 and the return is 30.2

Sorry if I don't get the exact technical terms right. The boiler is a Buderus logamax plus gb072-24k v2. I set the boiler flow to 60C and the TMV to 45C as instructed. Indeed the boiler didn't shut down. Kept it at 60, drop to 58 and repeat. Saw some swings to 64 and to 56 as well. Regardless...

I got an issue with the UFH and hopefully someone can help me out as I see there are a lot of knowledgeable people here. Quick brief about the situation: House with 2 floors, UHF everywhere (no radiators, not even in bathrooms), 24 kw gas boiler. Each floor has its own panel with circulation...