The above makes no real sense either as the temperature keeps rising when the burner is apparently off.
What signal/indication are you using to tell you that the burner is firing or not?.
I would suggest monitoring the burner firing time (boiler on/off) by watching the flame actually coming on/off in the viewing window and monitoring the temperatures.
I would also suggest that you do the above on the UFH(s) and monitor the manifold flow temp (which I don't think you have been) and note the total flow as per the flow tubes, the UFH output can then be cross checked reasonably well by using the % boiler cycle firing time. The manifold temperature gauges should also give reasonably accurate temperatures.
What signal/indication are you using to tell you that the burner is firing or not?.
I would suggest monitoring the burner firing time (boiler on/off) by watching the flame actually coming on/off in the viewing window and monitoring the temperatures.
I would also suggest that you do the above on the UFH(s) and monitor the manifold flow temp (which I don't think you have been) and note the total flow as per the flow tubes, the UFH output can then be cross checked reasonably well by using the % boiler cycle firing time. The manifold temperature gauges should also give reasonably accurate temperatures.
Last edited: