M. Gerd
2020-03-22 17:56:40
- #1
Hello everyone,
while heating up our screed, I noticed that it was dripping from the ceiling at one spot. The heating engineer broke up the screed at one point where a coupling was installed, but everything was dry there. I was told that the pressure of 2 bar would go directly into the basement if water had leaked out, since the special electric heating used for heating up has no expansion tank. We suspected that it might have come from the roof because there was also heavy rain at that time and the roofer was sealing it.
After the flow temperature reached its highest value, the dripping stopped. Now the temperature is dropping and is currently at 30°C. I have now noticed that the pressure in the underfloor heating has dropped from 2 bar to 1.3–1.5 bar. 1.3 bar at the manifold in the attic floor and 1.5 bar at the heating unit. Yesterday the flow temperature was 35°C and the pressure was each about 0.1 bar higher.
My assumption now is that the water expanded due to warming and flowed out somewhere through a leak in the underfloor heating. Now that the temperature is falling, the pressure is dropping because there is less water. We have about 200m², so at least 100 liters of water in the underfloor heating. When heated from 20°C to 50°C, the volume would then be 101 liters. This 1 liter more also roughly corresponds to what dripped from the ceiling.
Is it perhaps normal that the pressure drops when the temperature drops again during functional heating, or could my assumption be correct and I have a leak somewhere in the underfloor heating?
so long..
while heating up our screed, I noticed that it was dripping from the ceiling at one spot. The heating engineer broke up the screed at one point where a coupling was installed, but everything was dry there. I was told that the pressure of 2 bar would go directly into the basement if water had leaked out, since the special electric heating used for heating up has no expansion tank. We suspected that it might have come from the roof because there was also heavy rain at that time and the roofer was sealing it.
After the flow temperature reached its highest value, the dripping stopped. Now the temperature is dropping and is currently at 30°C. I have now noticed that the pressure in the underfloor heating has dropped from 2 bar to 1.3–1.5 bar. 1.3 bar at the manifold in the attic floor and 1.5 bar at the heating unit. Yesterday the flow temperature was 35°C and the pressure was each about 0.1 bar higher.
My assumption now is that the water expanded due to warming and flowed out somewhere through a leak in the underfloor heating. Now that the temperature is falling, the pressure is dropping because there is less water. We have about 200m², so at least 100 liters of water in the underfloor heating. When heated from 20°C to 50°C, the volume would then be 101 liters. This 1 liter more also roughly corresponds to what dripped from the ceiling.
Is it perhaps normal that the pressure drops when the temperature drops again during functional heating, or could my assumption be correct and I have a leak somewhere in the underfloor heating?
so long..